Schlumberger Cl200 Watthour Meter Manuals

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I will tell you what those three dots that replaced your old fashionedspinning wheel means.

Upgrading to 200 Amp Service

This will help you figure out how much "juice"/instantenous power is being used by a given appliance with a short test.
See the meter(watch the dots) in the picture below, switch between 0.720kW and12.0kW.Well, I was trying to figure out how much electricity was being usedby some hungry appliances.
So, I went to my Itron Centron Watt-hourmeter C1SR 304A 1.0Kh - CL200 240V 3W.
I was able to see what effecthaving the hot tub turned on for one hour had on the reading of thekwatt-hour (kWh, kilo watt hour , kilo-watt-hour) display.
But whatever happened tothat old wheel on the base of the old electric meters.
Well, it has been replaced with a wheelemulator or disk simulator which shows 3 dots.
By watching these dotsyou can tell your instant usage. Fast changing means using a larger amount of watt-hours thenslow changing of the display.
Are you happy now? I was not and called my electric company Xcel Energy and had no luckwhat so ever.
After several calls and being put on hold while theylooked for an answer.
I decided some web searches and still noanswer. I finally searched for the manufacturer which is Itron(formerly Schlumberger Electricity, Inc).
I found a nice productdescription at Itron.comandsome more detailed specificationsbut still no answer to the dots and how to get one watt-hour(Wh) data from themeter.
So, finally called the phone number on the product data sheet aboveand was put in contact with an engineer who had the answer which I amnow sharing with you.
Hope this helps some people like myself with alittle less effort to get the answer.
At 12 o'clock on the face (direction, not time of day) - directlyabove the meter an infrared light is omitted at a rate of one pulse per watt-hour usage.
Okay, probably does not helpyou. Your other option is to read that emulator which has 3 dots that turnon and off on the C1SR model.
Here is the pattern. First the left goeson, then the middle goes on, then the right goes on, then the leftgoes off, then the middle goes off, then the right goes off.
Kind oflike a digital wheel being emulated, cute.
Well, that full cycle is 6watt-hours or to make it simpler, every time one of those dots changes it is1 watt-hour.
Now you can do simple tests of turning on something (like ahot tub, hair drying, drier, tv, light bulb, etc) and count the numberof dots you see or if it is going fast the number of cycles (multipleby 6 the result) and you have the energy usage of watt-hours of that appliance duringa fixed period.
One minute periods worked well for me.
If you wantfull accuracy you can turn off the entire house at the circuit breakerand just turn on the breaker for the one appliance (I did not need toget that accurate).
ENJOY.Well, here is how I figured out what mine was using.It is a Wind River Hurricane Pinnacle built in 1998.
It runs 230VAC,60Amp,60Hz and when it has 250 Gallons of water the manual says thatwith a good cover the heater can add 8 degrees Fahrenheit perhour.
So, figure out the temperature loss per hour and that tells youhow often the heater needs to run.
My data showed my house used about 3.5 cycles/min or 21 Watt-hours/Min or 1.26kWh/Hour.My data showed that running the heater and the two jet motors used 34cycles/min or 204 dots/min (Wh/min).
So subtract the 21 Watt-hours/Min thatis normally used and you get 183 Wh/M which is 10.98kWh/H.
Running theheat alone was 5.58kWh/H and the jets alone was 5.94kWh/H. There must besome overlap since running both is less then the sum of the parts.
So,that is how it is done. Now see the heater run time and multiple by the heater usage and youfigure out your monthly usage and then your cost.Thanks to Mark Petrovic who did a searching of the FCC device databaseand found more information on the meter, including the Technical Reference Guide.
Entering into the following page the ID "SK9" as thegrantee code at the FCC Prod site.Here is another link on reading your Bi-directional Meter.
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Integrated Well Abandonment. The CL 200 on your electric meter refers to your Amp service.
However, CL 200 simply indicates capacity instead of confirming actual service.
Your power company can confirm service capacity. If your home isn't at 200 Amp service, consider upgrading with help from a licensed electrician.
Enter a zip below and get matched to top-rated pros near you. You don't have to be an electrician to know what the numbers on your meter mean.
What might look like some random codes are important denotations for your home's electrical system.
One string of characters that might be leaving you mystified is CL 200.
Let's clear up the confusion! Most people who live in modern, single-family homes will come across this string of numbers and letters on their meters.
CL 200 indicates that your home is rated for up to 200 Amp service. Of course, even an older home may also be at 200 Amp service, and it’s possible to update an older house to have 200 Amp service.
The 200 Amp service represented by the CL 200 indicator on your electric meter means that your box is rated for up to 200A continuous 220/240V power draw through it.
In other words, the combined total load from both your breaker boxes and main breakers should not go beyond 200A on each live lead of your 220/240V wiring.
Related Article. The average cost to move an electric meter ranges from $100 to $1,200.
While you may have a CL 200 meter base, that doesn't mean that you necessarily have 200A service drop capacity.
In fact, your actual capacity could be much less than 200A. The CL 200 distinction simply means that your box is rated for up to 200 Amp of continuous line power demand.
It is in no way a guarantee that your incoming drop service is rated for 200 Amp.
If you have questions about your actual drop service capacity, it's important to check in with your power utility company.
A local electrician can also help you get answers regarding the specifics of the power setup at your home.
Some common reasons why service capacity might be limited include:. Your meter box capacity .
Service drop (wiring) capacity .
Service connection capacity. It's not unheard of for some utility companies to limit your allocated service capacity based on what other properties sharing the same transformer have already installed.
In some cases, a power company may require a transformer upgrade before you can upgrade a home's power demand.
While this is sometimes a covered expense, it may cost thousands of dollars for transformer or service drop upgrades.
If you've discovered that 200 Amp service is available, you might consider upgrading to account for heavier electrical loads at your house.
This is common when people add additions, new appliances, new sump pumps, heated pools, and other new items that increase a home's electrical load.
It's always necessary to have a licensed electrician upgrade your home to 200 Amp service, and permits are required.
Most municipalities require an in-person inspection.
It's also usually necessary to have the power company disconnect power during installation.
The full job includes installing the 200 Amp service wire, a main disconnect, and a new 200 Amp electrical service panel.
Upgrading to 200 Amp service will cost you between $750 and $2,000.
West Union, SC 29696
The product you have purchased contains a battery (or batteries), circuit boards,
and switches. The batteries are recyclable. At the end of the meter’s useful life,
under various state and local laws, it may be illegal to dispose of certain
components into the municipal waste system. Check with your local solid waste
officials for details about recycling options or proper disposal.
This equipment generates, uses, and can radiate radio frequency energy. If not installed and
used in accordance with the instructions manual, this equipment can cause interference to radio
communications. The equipment has been tested and found to comply with the limits for a Class
A computing device pursuant to FCC Part 15, Class A registration of FCC Rules, which are de-
signed to provide reasonable protection against such interference when operated in a commercial
environment. Operation of this equipment in a residential area may cause interference in which
case the user will be required to correct the interference at his own expense. The user is encour-
aged to try to correct the interference by one or more of the following measures:
•Increase the separation between the equipment and receiver
Consult the dealer or an experienced radio/TV technician for help
North American Business Offices
6700 Century Avenue, Suite 100
Canada
Fax: 905-812-5028
Ejercito Nacional 425
Mexico City, Mexico
Fax: 52 55 5263-3193
313-B North Highway 11
Tel: 864-638-8300
vi
CENTRON® Meter Technical Reference Guide
Proprietary Rights Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Trademarks Used in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Compliance With FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . iii
FCC Part 15, Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
FCC Part 15, Subpart C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Factory Repair of Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Repair of Meters Under Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Repair of Meters Not Under Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Service Return Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1-3
Meter Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Personality Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Product Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 1-4
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Display Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Characteristic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Burden Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
C1SD/C1ST/C1SL Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Shipping Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Selecting a Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Installing the Meter into Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Programming the C1SD,T,L Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Retrofitting with Personality Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
viii CENTRON Technical Reference Guide
CENTRON 1S, 2S CL200, and 3S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
CENTRON 2S CL320, 4S, 12/25S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 3-4
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 4-1
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Kilowatt Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Resetting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
LCD Display Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Stepper Motor Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Modes of Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Alternate Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Programmable Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Register Display Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Self Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Last Season Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Informational Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-10
Test Mode Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12
Programming the Meter With a 200 Series Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .5-12
Demand Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Time-of-Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
TOU Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-15
Calendar Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-15
Rate Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Daily Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Seasonal Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Daylight Savings Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Current Season Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Last Season Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Load Profile Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-17
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5-17
Bit Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
Interval Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-17
Power Outage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
Channel Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
Data Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Recording Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
CENTRON Technical Reference Guideix
Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
Electronic Detent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
Expansion Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 5-19
Security Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 5-19
Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20
Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 5-20
Demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20
Demand Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21
Power Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Battery Life (Load Profile & TOU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Three Button Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
Option Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25
CENTRON R300CD Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 5-25
Programming the R300CD Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 6-2
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Electronic Detent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Resetting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Transmission Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
FCC Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 6-4
Tamper Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Testing the CENTRON C1SR Tamper Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Retrofitting the C1SR Personality Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 7-2
Transmission Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Display Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Resetting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Programming the C1SC/CN1SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . 7-4
Chapter 8Testing, Troubleshooting, and Maintenance
Testing Support Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Infrared Test LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Pulse Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Watthour Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
TOU Rate Annunciators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Test Mode Annunciator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Testing with the Infrared Test LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Testing Using the Disk Emulation Annunciator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
xCENTRON Technical Reference Guide
Recommended Energy Testing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
AEP Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Field Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Required Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Error Codes (R300) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Non-Fatal Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Fatal Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Error Codes (Demand, TOU, and Load Profile) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Non-Fatal Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Fatal Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . 8-7
Inspecting and Troubleshooting—General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
Blank Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
Time and Date Wrong (TOU or Load Profile Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
No Accumulation of kWh or kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
Software Cannot Communicate with Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Reed Switch Does Not Activate the Alternate Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 8-9
Reset Mechanism Does Not Initiate Demand Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 8-9
Demand Reset Cannot be Initiated Through PC or Handheld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Test Mode Switch Does Not Place Module in Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Inspecting and Troubleshooting—C1S LCD and C1SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-10
Blank Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
C1S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
C1SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
C1SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
C1SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
C1ST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
R300CD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
C1SL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
1.1Personality Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2Form 1S, 120 Volt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.3Form 2S, CL200 240 Volt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.4Form 4S, 20 Amp Transformer-Rated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.5Personality Module Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.6Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.7C1SD/C1ST/C1SL Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
2.1Removing the Inner Protective Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.2Removing the Two-lead Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 2-4
2.3Removing the Board-to-Board Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 2-4
2.4Removing the Register Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.5New Module Snap-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.6Circuit Board Notches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.7Board-to-Board Connector, Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.8Board-to-Board Connector, Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
3.1Power Measurement Principle in 2S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2Simplified CENTRON Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 3-3
3.3Hall Cells and ADCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
4.1C1S Personality Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2Mounted Clock and LCD Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.3Clock Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.4ZRO-C2A Resetter Connected to the CENTRON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.5Reverse Side of ZRO Resetter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.6LCD Display without Segment Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.7LCD Display with Segment Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 4-6
4.8Stepper Motor Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
5.1C1SL Meter with Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2C1SL Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.3Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.4Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5.5Program File Export. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . 5-13
5.6Program File Export Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.7Import Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5.8Battery Life Calculation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
5.9CENTRON TOU Personality Module with R300CD Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
6.1C1SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2CENTRON C1SR Transmission Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
6.3FCC Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 6-6
7.1C1SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.2CellNet Telemetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
7.3C1SC/CN1SC Programming Port Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
8.1LED Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.2Pulse Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.3TOU Rate Annunciators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
9.1Form 1S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
9.2Form 2S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
9.3Form 3S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
9.4Form 4S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
FigureFigure TitlesPage
xiiCENTRON Meter Technical Reference Guide
9.5Form 12S Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
9.6Form 25S Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-10
1.1Outer Cover Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
5.1LCD Display Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.2Register Display Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5.3Programmable Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
5.4Information Data Items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
5.5Test Mode Data Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
5.6Recording Duration for 32Kb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
6.1ReadOne Pro Tamper Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
8.1AEP Test Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
8.2Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
8.3Non-Fatal Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
8.4Fatal Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
9.1C1S Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.2C1SR Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
9.3C1SC Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
9.4C1SD Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
9.5C1ST Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.6R300CD Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
9.7C1SL Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
TableTable TitlesPage
xivCENTRON Meter Technical Reference Guide
Chapter 1General Information
This technical reference guide explains the installation, operation, and
maintenance of the SchlumbergerSema CENTRON® meter family.
SchlumbergerSema urges you to read the entire manual before attempting
installation, testing, operation, or maintenance of a meter. To operate the
SchlumbergerSema PC-PRO+® Programming Software and the PRO-READ®
handheld reader programmer discussed in this manual, refer to their respective
About This Manual
This manual contains the following information as listed in the chapter
Chapter 1
Provides a general description, operation, physical and
functional descriptions, and complete meter specifications.
Installation
Gives instructions for the proper handling and installation.
Operation: Base Metrology
Describes the measurement technique used for the base
Chapter 4
Provides a physical description and operational
characteristics of the basic watthour (kWh) only meter for
Chapter 5
C1SL
Provides detailed information and theoretical operation for
Demand (C1SD), Time-of-Use (C1ST), and Load Profile
(C1SL) versions. Gives step-by-step procedures for
accessing the three operational modes and associated
Chapter 6
Provides a physical description and the operational
characteristics of the R300 900 MHz radio frequency
Chapter 7
Provides a physical description and the operational
characteristics of the CellNet personality module.
Testing, Troubleshooting,
Provides an explanation of the testing, troubleshooting, and
Chapter 9
Drawings
Provides a listing of meter part numbers and drawings.
1-2CENTRON Meter Technical Reference Guide
The CENTRON meter family is a solid-state, singlephase and network meter used
for measuring electrical energy consumption. The CENTRON incorporates a two-
piece design combining a base metrology with a variety of personality modules
that snap on the standard meter base. Utilizing the Hall Effect technology for
accurate power measurement, the metrology portion of the meter contains all
measurement circuitry and calibration information, while the personality modules
contain the register functionality and communication mediums.
Each version of the meter is distinguished by the various personality modules that
mount to the standard meter metrology base (see Figure 1.1) The personality
•Energy only—C1S (clock, cyclometer, or LCD)
•Time-of-Use (TOU) with Demand—C1ST
•Energy only with radio frequency AMR—C1SR
•Energy plus demand with radio frequency AMR - R300CD
Cyclometer
R300
CellNet
Clock
CENTRON Meter Technical Reference Guide1-3
The CENTRON meter features a common meter base to which various personality
modules are attached. The covers come in configurations of polycarbonate and
Meter Base
The CENTRON meter base contains all of the measurement circuitry and
calibration information on a SchlumbergerSema metrology board.
The meter base assembly includes two current conductors, a flux-directing core, a
Hall Effect device, the metrology circuit board, and the ultrasonically welded
module support. The base also contains a MOV, metal oxide varistor, which is used
Meter bases are built specific to the metering form and are available in Form 1S, 2S
CL200, 2S CL320, 3S 120V, 3S 240V, 4S, and 12/25S configurations.Examples are
Figure 1.2 Form 1S, 120 VoltFigure 1.3 Form 2S, CL200 240 Volt
1-4CENTRON Meter Technical Reference Guide
All of the personality modules in the CENTRON meter family snap into the module
holder located on the standard meter base (see Figure 1.5). From the base
metrology, the energy data is transmitted to the personality modules, which
contain the meter display, communication mediums, and register functionality.
Product Availability
MetrologyClass 100, 120V, Form 1S
Class 320, 240V, Form 2S
Class 20, 240V, Form 3S
Class 200, 120V, Form 12S
Personality
C1S—Clock (5x1 or 4x10)
C1S—LCD (5x1 or 4x10)
Frequency)
C1SD—Demand
C1SL—Load Profile
CENTRON Meter Technical Reference Guide1-5
The CENTRON C1ST and C1SL modules contain a battery that powers the clock
circuit during a power outage. The battery is permanently soldered to the module
The TOU and Load Profile modules display a Low Battery error code (Er 000001) if
the minutes on the battery counter exceeds 525600 minutes (1 year). Refer to
Chapter 5,"Operation: C1SD, C1ST, and C1SL Versions" for detailed battery
Covers
The outer cover configurations available for CENTRON meter family are described
Outputs
The C1SD, C1ST, and C1SL personality modules are available input/output-ready
(I/O-ready). These modules contain circuitry that allows future functionality
Display Functions
The C1S and C1SR modules can display kWh readings in either a 5x1 or 4x10
The C1SD, C1ST, and C1SL modules can display a maximum of 32 Normal, 32
Alternate, and 8 Test display items, up to a total of 48 items.
Electrical
Meter VersionsCover Options
C1S, C1SR, C1SCStandardOptional
C1SD, C1ST, C1SLIncluding Demand Reset+ Optical TowerNot Available
Operating Voltage± 20% (60 Hz); ± 10% (50 Hz)
Operating Range± 3 Hz
Operating Range2.7V - 3.8V
1-6CENTRON Meter Technical Reference Guide
Characteristic Data
Temperature-40°C to +85°C
Accuracy ± 0.5% @ unity power factor
Transient/Surge SuppressionANSI C37.90.1 - 1989
ANSI C62.45 - 1992
2S CL2005W
3S CL201.2W
Temperature RiseMeets ANSI C12.1 Section 4.7.2.9
1S120 0.453.7
2S Class 3202400.6510.2
4S2400.65 10.2
240V
Watt Loss0.010.010.010.450.900.90
120V
Watt Loss0.010.010.010.280.900.90
120V Option BoardR300CD
VA 23
Watt Loss2.2
CENTRON Meter Technical Reference Guide1-7
To get the watt loss or VA of the overall product, add the metrology watt loss to the
Technical Data
•ANSI C12.1-1995
•ANSI C12.20 (Class 0.5) - 1998
•IEC 61000-4-2
The following dimensional measurements are shown in inches and (centimeters).
VA (Meter)VA (Metrology)VA (Register) + VA (Option Board)+=
Watt Loss (Meter)Watt Loss (Metrology)Watt Loss (Register) + Watt Loss (Option Board)+=
Polycarbonate
6.29 (16.00)6.95 (17.70)2.70 (6.90)3.16 (8.00)4.53(11.50)
6.42 (16.30)6.95(17.70)3.17 (8.10)3.64 (9.20)5.01 (12.70)
1-8CENTRON Meter Technical Reference Guide
The following dimensional measurements are shown in inches and (centimeters).
Shipping Weights
The following weight measurements are shown in pounds and (kilograms).
ABCDEFGH
6.29 (16.00)6.95 (17.70)2.70 (6.90)3.16 (8.00)4.53(11.50)4.98(12.70)6.29(16.00)6.95 (17.70)
Meter1.375 (0.623)2.75 (1.247)
96 Meter Pallets214 (97.30)335 (152.30)
Chapter 2Installation
This chapter of the guide gives instructions for the proper handling and installation
Inspection
Perform the following inspections when you receive the meter:
•Inspect for obvious damage to the cover, base, and meter assembly.
•Compare the meter and register nameplates to the record card and invoice.
Verify the type, class, voltage, form number, and other pertinent data.
Battery
The lithium battery is soldered to the register module circuit board(C1ST and
C1SL only). A low-power mode for the battery preserves the capacity of the
battery. Factory-programmed C1ST and C1SL meters should be put into service in
a timely manner to avoid degradation of the battery. Programmed meters are not in
Storage
Store the meter in a clean, dry (Relative Humidity < 50%) environment between
-40° C to +85° C (-40° F to +185° F). Avoid prolonged storage (more than one year)
at temperatures above +70° C(+158° F). Store the meter in the original packing
material. The lithium battery has a shelf life of approximately fifteen (15) years.
The product you have purchased contains a recyclable lithium battery. At the end of its
useful life, under various state and local laws, it may be illegal to dispose of this battery
into the municipal waste stream. Check with your local area solid waste officials for
details about recycling options or proper disposal.
The C1SR also contains a tilt switch that may contain mercury. Please dispose of
2-2CENTRON Meter Technical Reference Guide
As with all precision electronic instruments, the meter should be handled with care
in an outdoor environment. Follow these precautions when handling the meter:
•Avoid damaging the meter base, cover, reset mechanism (if supplied), and
•When handling personality modules, grip the circuit board by its edges. Do not
Selecting a Site
The meter is designed and manufactured to be installed in an outdoor
environment, at operating temperature ranges between -40° C and +85° C (-40° F to
+185° F). Operation in moderate temperatures increases reliability and product
When using a Demand, TOU, or Load Profile meter where the line frequency is not
stable, SchlumbergerSema recommends using either the C1ST or C1SL meter
version with Crystal Time synchronization if a clock is needed (TOU or Load
Installing the Meter into Service
Install the meter base using standard meter installation practices.
The current and potential terminals extend as blades, or bayonets, from the back
of the meter. The meter is plugged into the socket so that the bayonets engage the
main socket jaws that connect to the service lines. Clamping pressure on the
bayonets is provided by the heavy spring pressure of the socket jaws. In some
heavy-duty sockets, jaw clamping pressure is provided by a handle or wrench.
On meters equipped with LCD displays, verify register operations by observing the
•LCD displays the correct number of digits (4 or 5).
•If the test mode annunciator is flashing, depress the Test mode button to
return the meter to the Normal mode (C1S D/T/L only).
•If the register only displays a Segment Test (all display items shown) and
flashes “CNTRON”, the register has not been programmed.
Programming the C1SD,T,L Meter
The personalitymodule should be powered prior to programming. The module can
be programmed using the optical connector. The default communications rate
when programming through the optical tower is 4800 baud; 9600 baud is
selectable. Refer to PC-PRO+ documentation for detailed programming
CENTRON Meter Technical Reference Guide2-3
CENTRON meters can be upgraded to increase functionality by changing the
To change or add a Personality Module:
2Remove the outer (polycarbonate or glass) cover.
3Remove plastic inner cover by holding the meter with both hands and applying
equal pressure on either side of the three and nine-o’clock positions (see
Figure 2.1). The inner cover is held in place by four plastic tabs on the meter
Figure 2.1 Removing the Inner Protective Cover
•If a mechanical register is present, remove the two leads that connect the
register to the metrology board (see Figure 2.2).
Mechanical registers built after June 2000 have two individual connectors
that are removed by pulling away from the metrology board.
Do not power ON the meter without the inner cover in place. Power the meter OFF before
removing the inner cover. Personality modules are sensitive to ESD damage. Take
appropriate grounding measures before retrofitting!
2-4CENTRON Meter Technical Reference Guide
•If an electronic register is present, remove the black board-to-board
connector between the circuit board and the metrology board by pulling it
by its middle while moving it side-to-side (see Figure 2.3). To maintain the
integrity of the connector, only remove it when you are upgrading the
Figure 2.3 Removing the Board-to-Board Connector
5Remove the register module, one side at a time, by pulling gently outward on
the meter frame snaps (see Figure 2.4) while lifting the module up.
Board-to-Board Connector
CENTRON Meter Technical Reference Guide2-5
6Snap the new module into the meter frame by aligning the notches at bottom
of the circuit board with the lower two snaps (see Figure 2.5).
Meter Snaps
The module must be aligned properly in the snaps to avoid damaging the connector or circuit
2-6CENTRON Meter Technical Reference Guide
7Replace the board-to-board connector by aligning the top of the connector
with the notches in the circuit board (see Figure 2.6) and pressing gently at the
bottom of connector to mate the connector to metrology board (see Figure
2.7). Then, gently press the top of the connector to mate it to the register
module (see Figure 2.8). The connector is seated correctly when you hear it
Figure 2.6 Circuit Board Notches
Notches (2)
Be sure to use the meter base for leverage instead of the LCD holder (see Figure 2.7). Pressure
on the LCD holder may damage the personality module.
CENTRON Meter Technical Reference Guide2-7
8Ensure the board-to-board connector is fully seated by pressing firmly in on
Figure 2.8 Board-to-Board Connector, Top
9Carefully replace the inner protective cover. Engage the top snaps first, taking
care to place the slot at the top of the cover over the IR light pipe. Failure to do
so could break the light pipe. Ensure that all four meter base tabs are engaged
with the slots at the top and bottom of the inner cover.
10Place the cover over the meter base until the flange on the cover is flush with
11Turn the cover clockwise until the locking tabs are fully engaged with the
12If the cover has a Demand Reset or an Optical Connector, be sure these are
properly aligned with their corresponding accessory on the register faceplate.
If not aligned correctly, the Demand Reset or Optical Connector will not
function properly. If the Demand Reset plunger is not in the retracted position
before turning the outer cover, the mechanism may be damaged.
2-8CENTRON Meter Technical Reference Guide
Chapter 3Operation: Base Metrology
This chapter describes the measurement technique used for the base metrology on
CENTRON 1S, 2S CL200, and 3S
The CENTRON meter is a solid-state meter which uses the inherent multiplication
properties of the Hall Effect to measure power. The Hall Effect principle relies on a
physical property: a conductor which carries a current in a magnetic field
generates a voltage difference across the conductor proportional to the product of
The voltage Vout created at the output of the Hall device:
ib is the biasing current (derived from the line voltage)
B is the magnetic field density (derived from the line current)
K is the Hall coefficient (analogous to a gain factor in any meter)
K could be viewed as the Hall sensor intrinsic gain and is maximized by the
appropriate choice of semiconductor materials that have been uniquely optimized
For the metering application, the biasing currentib applied to the sensor is
generated from the line voltage (V) using a resistor (R).
The magnetic field (B) is generated by the line currents (I = I1 + I2) that flow
Where
C is a constant that is dependent upon the geometric and magnetic properties
This field is focused to flow through the Magnetic Core’s air gap where the Hall
sensor is precisely positioned. The voltage, Vout, which is formed on the Hall
Effect device is proportional to the input watts (see Figure 3.1).
ibVR⁄=
1I2
3-2CENTRON Meter Technical Reference Guide
The output voltage of the Hall Effect device is then:
G is the combined gain factor of the entire system (Voltage to biasing current, line
Figure 3.1 Power Measurement Principle in 2S
From the power information available at the output voltage of the sensor, the
meter architecture is simplified over previous designs as the multiplication has
The Hall sensor output voltage is amplified by a differential amplifier in order to
bring the signal within the nominal level of the analog to digital converter (ADC).
The output of the ADC is integrated over time to get the energy information and
generates a pulse stream that is accumulated into a counter. When the
accumulated pulses reach a threshold set by meter calibration, a Wh pulse is
emitted and the meter LED is flashed. The counter threshold is programmed at the
factory and serves as the permanent gain calibration for the life of the product. The
calibration is a digital feature and has no variation or adjustment. All the
processing steps described above are integrated into a SchlumbergerSema
Application Specific Integrated Circuit (ASIC) to improve reliability and reduce
Vhall V=out GIV GPower
ib
CENTRON Meter Technical Reference Guide3-3
The custom ASIC cancels all the offset generated by the meter and removes the
need for a light load adjustment of the metrology. This allows the meter to have
excellent accuracy over a very large dynamic range, especially at the low current
levels. For this reason, no offset adjustment is needed or provided for the
There is a slight phase shift in the current to flux density conversion due to eddy
currents in the magnetic core material. This shift causes a small power factor error
that is uniform across the dynamic range (load curve) of the meter.
SchlumbergerSema compensates for this shift in the CENTRON by the use of a
capacitor in the biasing current circuit. This correction is permanent.
•Wh pulses to drive the Test LED
The same signal is also provided to the electronic register attachments.
•60Hz clock signal synchronized with the line voltage (for time keeping)
•pulse that drives the stepper motor for the mechanical register attachment (1
The metrology board, which houses the measurement components described
above, passes the following signals to the personality module attached to the meter
•When a cyclometer or clock register is used, the motor pulse signals drives the
•When an electronic module is used, the Wh pulse, energy direction, and 60Hz
clock are provided by the metrology. The two line voltages (one is referred to
as meter ground), and power supply references are also supplied for reference
An inherent feature built into the design of each CENTRON ensures that the calibration of the
product is not affected by any electronic board (existing or planned) added to the meter. This is
achieved by a distributed power supply and documented design requirements in the CENTRON
3-4CENTRON Meter Technical Reference Guide
The advanced metering forms of the CENTRON (2S CL320, 4S, and 12/25S) meter
use the same Hall Effect measurement principle that is used in the form 1S, 2S, and
3S metering forms described earlier in this chapter.
The major difference with these metering forms is the presence of two Hall cells,
For these metering applications, the biasing currentIbias (Ibias1 and Ibias2) applied to
each sensor is generated from the line voltage (Vline1 and Vline2) using a resistor. The
magnetic field is generated by the line current (Iline1and Iline2) that flows through the
conductor looped around each core. The voltage (Vout1 and Vout2) that is formed on
each Hall Effect device is proportional to the watts produced by each phase.
Each Hall sensor output voltage is amplified by a differential amplifier in order to
bring the signal within the nominal level of the ADC. ADC 1 sums the signal from
ADC 1 and ADC 2. The output of ADC 1 is integrated over time to get the energy
information. Each time the integrated signal exceeds a predetermined amount of
energy, a pulse is generated. The pulse stream is accumulated into a counter. When
the accumulated pulses reach a threshold, a Wh pulse is emitted and the meter
LED is flashed. The counter threshold is programmed at the factory and serves as
the permanent gain calibration for the life of the product. The calibration is a
digital feature and has no variation or adjustment. ADCs 1 and 2 are calibrated
independently, which means that each phase is calibrated independently.
Chapter 4Operation: C1S Version
The kWh only version of the CENTRON meter is available with one of three
personality modules to register energy accumulation:
All three modules are interchangeable and may be ordered with a 5x1 or 4x10
register for self-contained meters, and a 5xTR or 4xTR register for transformer-
The kWh only version of the CENTRON provides very accurate measurement for
energy accumulation for today’s needs, but also provides a platform for easy
Physical Description
The CENTRON Personality Modules snap into the meter register mounting
The clock and cyclometer modules are connected to the metrology board via a
two-wire connector that easily attaches to the edge of the metrology board (see
Figure 4.2). Clock and cyclometer modules manufactured after June 2000 are
attached via two individual connectors. A pulse is sent every 10 watthours from the
metrology board to these modules. This pulse drives the electromechanical
stepper motor which, in-turn, drives the movement of the clock or cyclometer
dials. A test dial is located above the two right meter dials on every clock module.
One revolution of the test dial is equivalent to 1 kWh.
C1S Clock RegisterC1S Cyclometer RegisterC1S LCD Register
4-2CENTRON Meter Technical Reference Guide
The LCD module is connected to the metrology board using the board-to-board
connector. The following information is sent to the LCD module from the
•Line voltage
•Energy flow direction
•Line frequency
A connector is located at the 12 o'clock position behind the LCD for resetting the
energy register. This is done using the ZRO-C2A Resetter.
Registers
The modules display energy in increments of whole values of kWh. Standard
operation for all modules is to add forward and reverse energy flow. Therefore, if
the meter is inverted, the registers will accumulate in the forward direction, thus
providing uni-directional operation. At the time of order, the LCD module can be
selected to have a detent register. Programmed at the factory, this feature will
cease registration while the meter is inverted, or power flow is otherwise reversed.
CENTRON Meter Technical Reference Guide4-3
The pointers on the clock module are spring fitted to their staffs and can be easily
repositioned to reset the register (see Figure 4.3).
To reset the cyclometer register dials:
1First move the spring-loaded wire off of the hook that holds it in place.
When the hook is in place, it puts tension on the individual cyclometer dials.
After moving the wire off of its hook, a washer that helps to hold the dials in
2At that point, move all of the dials to the left (as viewed from the front of the
cyclometer). From right to left, one by one, move each dial to zero.
3After each dial is set to zero, press it to the right and hold all zeroed dials in
place. They will interlock with each other and will not move.
4After resetting each dial to zero, keep the dials locked together, move them to
the right side, and reset the spring-loaded wire to its hooked resting place.
5Be sure to secure the washer against the left-most dial with the hinge by
replacing the spring-loaded wire on the left side of the washer.
At that point, the spring-loaded wire will place tension against the washer and dials
and the cyclometer will be ready to operate again.
4-4CENTRON Meter Technical Reference Guide
The ZRO-C2A (see Figure 4.4) resets the energy register through a direct
connection to the connector at the 12 o’clock position on the LCD and R300
Figure 4.4 ZRO-C2A Resetter Connected to the CENTRON
The ZRO-C2A is a pocket-sized handheld device for resetting the electronic meter
readings in the CENTRON LCD kWh meter (C1S) and the R300 meter (C1SR). The
ZRO-C2A also resets the tamper indicators in the C1SR.
The ZRO-C2A requires that the meter Not Be Powered. The device connects to
the CENTRON meter through a hole in the plastic inner cover located at the 12
o’clock position on the meter (see Figure 4.4). Extending from the ZRO-C2A is a
cable terminating in a connector which mates to the programming connector of
Beginning February 20, 2002, the C1SR module for the CENTRON meter uses a
new EEPROM component. This new EEPROM operates at a different voltage level
Use of a ZRO-C or ZRO-C2 resetter without the C2A upgrade WILL CAUSE DAMAGE to
the personality modules on both the C1S LCD and C1SR meters produced after the new
EEPROM implementation date; damaged modules will show “Error” on the display.
CENTRON Meter Technical Reference Guide4-5
All current production resetters and resetters produced after June of 2001 were
built with the C2A upgrade and are labeled accordingly as shown in Figure 4.5
below. Although personality modules with the new EEPROM are only compatible
with the C2A version of the CENTRON resetter (ZRO-C2A), the older revisions of
the personality modules are also compatible with the ZRO-C2A.
LCD Display Function
Two separate versions of the LCD are available. Both versions may be configured
for either four or five digits and will roll over at 100,000 KWh. The LCD is
automatically adjusted for contrast over the operating temperature range.
The non-segment check version displays only the kWh reading. A downward
pointing arrow on the LCD pulses at a rate equal to the energy consumption (see
Figure 4.6). The arrow flashes on for 1 watthour and off for 1 watthour. This
Figure 4.6 LCD Display without Segment Check
A second version of the LCD is available which displays the kWh reading and a
segment check (see Figure 4.7). The display scrolls between the kWh reading and
segment check with 7 seconds of on-time for each display item.

4-6CENTRON Meter Technical Reference Guide
The three triangle segments in the bottom right corner of the display represent a
watt disk emulator. This electronic load indicator will advance with each pulse,
since each pulse is equivalent to one watthour. Reverse power is indicated by a
reversal in the direction of the electronic load indicator.
As of May 2000, the stepper motor connector on the CENTRON C1S Clock and
Cyclometer personality modules, as well as the mating connection point on the
metrology board was revised. This revision, as shown in Figure 4.8 below, will
increase accessibility when removing or installing the registers.
When replacing the stepper motor, be sure to order the proper motor for your

Connection to metrology with white
Connection to metrology with two separate
Chapter 5Operation: C1SD, C1ST, and C1SL Versions
The CENTRON meter is available with interchangeable personality modules that
snap-into the standard CENTRON metrology base. The three multifunction
•C1SD—a demand module
•C1SL—a load profile module with TOU and demand
These personality modules utilize the SCS protocol which allows the C1SD, C1ST,
and C1SL meters to mimic the SchlumbergerSema 200 Register Series product line
Features
•Non-Volatile Memory—Programming, register, and load profile data are
stored in the EEPROM during a power outage. The TOU and load profile
modules contain a battery that maintains the clock circuitry during a power
•Optical Port Communication—Each module can be programmed to
communicate 9600 or 4800 baud through the optical tower.
•Self-Read Capability—Billing data can be stored automatically at
•Load Profile—The C1SL module provides 32K RAM for load profile data.
•Expansion Capability—An expansion port is available for future functions.
5-2CENTRON Meter Technical Reference Guide
•Bidirectional Metering—All three multifunction versions are capable of
measuring and displaying forward and reverse energy only (kWh). These
modules have two separate registers; one for forward kWh and one for reverse
kWh. When the meter is programmed with electronic detent, both the forward
kWh register and the reverse kWh register will be utilized. When the meter is
programmed to be undetented, the forward and reverse energy will
The C1SD, C1ST, C1SL modules are available with an LCD display and a
polycarbonate cover. The cover contains the optical port adapter and demand
Controls and Indicators
All controls and indicators are shown in Figure 5.2. For detailed instructions about
a feature or control, refer to the appropriate subsection.
Modes of Operations
When the C1SD, C1ST, and C1SL modules are powered, they automatically enter
the normal display mode, perform self-diagnostics and display any appropriate
error codes. If no error codes are detected, an unprogrammed module will
alternate between CNTRON and Segment Test. A programmed module will
scroll through the Normal display sequence, displaying each selected quantity,
annunciator, and code number for the programmed duration.
The C1SD, C1ST, and C1SL modules each have three modes of operation:
•Alternate
LCD Display
Test LED
Annunciators
Test Mode Switch
CENTRON Meter Technical Reference Guide5-3
In Normal mode, the module display automatically sequences through the
programmed displays and annunciators in the programmed sequence. Each
parameter is displayed for the program-specified period (from 1 to 15 seconds),
followed by a blank display for one second. Only the annunciator appropriate to
the selected module display can appear while its data is displayed. Each display
can have a two-digit identifier. If selected, this code can be programmed to be any
Calculations are performed to obtain programmed quantities. Specific details of
the calculated values are covered under Programmable Functions in this section.
The meter will continue to operate in Normal mode until power is disconnected,
the Alternate display sequence is initiated, Test mode is selected, or an error
Alternate Mode
The Alternate mode provides an additional set of customizable display items that
are not typically used for billing applications. The Alternate mode is accessible
only from the Normal mode and is activated using either the magnetic reed switch
or a meter programming device. To activate the Alternate mode using the magnetic
reed switch, move a small magnet (approximately 30 gauss) near the reed switch
located at the 10 o’clock position on the side of the module (see Figure 5.2). The
magnetic reed switch can be accessed with the meter cover in place. To activate
the Alternate mode with a programming device, refer to the PC-PRO+
documentation. Immediately upon activation, Alternate mode is indicated by a
flashing ALT annunciator. The ALT annunciator will not appear if there are no
Once the Alternate mode has been selected, the display will sequence once
through the alternate program items and return to the Normal display sequence.
The quantities displayed are selected during programming and have the same
display timing as in Normal mode. Like the displays in Normal mode, each display
in Alternate mode can have a two-digit identifier, programmable from 00 to 99. The
calculations and operations performed in Alternate mode are identical to those in
Test Mode
Selecting the Test mode causes the current interval demand to be compared to the
stored maximum demand and the current billing data to be transferred to non-
volatile memory. If the current interval demand value is greater than the maximum
demand, the current interval demand becomes the maximum demand. All Test
mode program parameters are then retrieved from nonvolatile memory for use in
the Test mode. In the C1SL version, a status bit is set to indicate the register was
The Test mode can be activated while in either Normal or Alternate mode using the
Test mode switch (see Figure 5.3) or a meter programming device. To activate the
Test mode with a programming device, refer to the PC-PRO+ documentation.
Immediately upon activation, the Test mode is indicated by a flashing “TEST”
annunciator in the lower left hand corner of the module display. The TEST
annunciator will not appear if there are no Alternate mode display items
5-4CENTRON Meter Technical Reference Guide
Refer to the PC-PRO+ documentation for information on selecting the Test mode
using a programming device. A programmable “Time-Out Length” from 1-to-99
minutes is available. After the programmed Time-Out Length has ended, the
register will automatically exit the Test mode. The demand test interval is
initialized whenever the Demand Reset button is pressed.
The magnetic reed switch, when activated, advances the Test mode display to the
next quantity. Calculations performed in Test mode are performed in the same
manner and based on the same program parameters as in Normal mode with the
exception of interval (subinterval) length. Test mode interval length and the
number of subintervals are specified independently for Test mode. The results are
displayed according to the display configuration selected when the register is
programmed. To exit the Test mode and return to the Normal mode, do one of the
•De-energize the meter.
•Wait for the selected Test mode time-out to occur.
Calculated values performed in Test mode are not added to previous billing values
or stored for retrieval. After exiting Test mode, all billing data previously
transferred to nonvolatile memory is retrieved, an End of Interval (EOI) is
Any time-dependent events such as rate switches, self-read, or daylight savings
time that occur while the meter is in Test mode are performed when the Test mode
Low Power Mode
The demand, TOU, and load profile modules are shipped from the factory in low
power mode unless factory programming is specified at time of order. This mode
consists of a default program and minimizes drain on the battery. The user can
place the meter in low power mode by performing a three button reset or by
programming the meter with the programming software as a demand-only meter.
While the module is on battery carryover, the display will show “on battry” while
the power is off. This can be observed by viewing the display at an angle at close
Test Mode Switch
CENTRON Meter Technical Reference Guide5-5
Low power mode can be verified in one of the following ways:
•By observing that the minutes on battery counter does not increase during a
•By observing the display during a power outage (from close range at an angle)
and verifying that the display does not show “on battry”.
See "Three Button Reset" on page 5-24 for instructions.
A nine-digit liquid crystal display, with a variety of annunciators, is provided on
these multifunction personality modules (see Figure 5.4).
Six large digits are available to display all billing and informational data. Three
decimal points are provided for programmable resolution of billing data.
Three small digits in the upper left-hand corner of the display are used to provide
code numbers to identify any display item. These three digits are used along with
the six data digits to display ID numbers such as the meter serial number and user
There are three triangle segments in the bottom right corner of the display that
represent a watt disk emulator. This electronic load indicator will advance with
each pulse, since each pulse is equivalent to one watthour. Reverse power is
indicated by a reversal in the direction of the electronic load indicator.
Directly below the three code number digits is the Test mode annunciator (TEST).
This annunciator will flash on and off once per second whenever the meter is in
On the far left of the bottom line is the Alternate mode annunciator (ALT). This
annunciator will flash on and off once per second whenever the meter is in
To the right of the Alternate mode annunciator are the TOU rate indicators (A, B,
C, D, Total). These indicators correspond to the four programmable TOU and
TOTAL rate. The TOU rate indicators can be programmed to be displayed with the
appropriate energy and demand quantities. When an energy or demand quantity for
the currently active TOU rate (A, B, C, or D) is displayed, the corresponding TOU
rate indicator will flash on and off once per second.
To the right of the TOU rate annunciators is the kWh annunciator. This annunciator
can be programmed to display with any energy quantity. The kWh annunciator can
be programmed to display as kW with any demand quantity.
The EOI annunciator is located to the right of the kWh annunciator. This
annunciator will turn on for four seconds at the end of each demand interval (or at
the end ofeach subinterval when rolling demand is used).
5-6CENTRON Meter Technical Reference Guide
The CENTRON can be programmed using SchlumbergerSema’s programming
Table 5.1 describes each display item and indicates the display mode in which each
is available. The display items and sequence of their display, along with any desired
annunciators or Identification (ID) code numbers, are selected during the
programming process. Detailed information on these display items can be found in
Table 5.1 LCD Display Items
Display ItemNormal Alternate Test
Maximum kW Demandxxx
Continuous Cumulative kW Demandxx
Self Read kWhxx
Last Season Billing Values (TOU only)xx
Segment Testxx
Meter ID (up to two 9-digit fields)xx
User Defined Fields (up to three 9-digit fields)xx
Software Versionxx
Number of Demand Resetsxx
Number of Days Since Demand Resetxx
Register Full Scale Valuexx
Demand Threshold Valuexx
CENTRON Meter Technical Reference Guide5-7
All calculated billing quantities to be displayed are specified through the
programming software. The following billing quantities are available for display in
•kWh
•Max kW Demand
•Continuous Cumulative kW Demand
•Self-read kWh
Energy and demand registers can be programmed to be displayed in any of the
Register Multiplierxx
Time (C1ST and C1SL version only)xx
Date of Last Reset (C1ST and C1SL version only)xx
Time on Battery Carryover (min) (C1ST and C1SL
Program ID Numberxx
Input Pulse Countx
Time Remaining in Test Modex
Display Mode
Table 5.2 Register Display Formats
Demand
X.XXXX.XXXXX.XX XXXX.XX
XXXXXXXXXXXX XXXXXX
5-8CENTRON Meter Technical Reference Guide
The C1SD is capable of storing one block of self-read data consisting of kWh and
maximum kW. The TOU versions, the C1ST and C1SL, will store one block of self
read data consisting of kWh and kW for all rates when a self-read is performed.
Self-read data is displayable in Normal or Alternate mode.
A self-read is programmed to initiate in one of three ways:
•Read on manual or electronic demand reset. When a demand reset is initiated,
all energy and maximum demand quantities are immediately transferred to
•Read on a programmed day of the month (C1ST and C1SL only). A specified
date (1st - 28th) can be programmed into the meter to indicate the exact day
that a self-read is to be performed. On this date at 00:00 hours, register
If desired, an automatic demand reset can be performed after this self-read.
•Read on a programmable number of days since the last manual or automatic
demand reset (C1ST and C1SL only). If the selected number of days (1 to 150)
passes without a demand reset, a self-read is initiated.
If desired, an automatic demand reset can be performed after this self-read.
For a C1ST or C1SL meter, Last Season Registers are selectable in the
programming software. For every Current Season Register there is a Last Season
Register for the same quantity. Last Season registers are stored in memory when a
season change occurs. Last Season registers are designated as LS in the
programming software. Last Season Registers are selectable for display in Normal
Operating Parameters
Programmable parameters establish the meter's configuration and define its
operation in Normal, Alternate, and Test modes (see Table 5.3). Only parameters
specific to the Test mode are displayable in Test mode. Parameters that can be
uploaded using a reading device, but cannot be displayed on the meter are
Energy XX.X
XXXX XXXX.X
XXXXXX
Table 5.2 Register Display Formats
Only the first 28 days of the month can be selected since February has only 28 days.
CENTRON Meter Technical Reference Guide5-9
Parameter Description
Display Scroll Time *The number of seconds (1 to 15) that each item is to be
Cold Load Pickup Time *(CLPU)
calculations are restarted after a recognized power
outage occurs. Setting this value to zero will cause
demand calculations to start immediately following a
Power Outage Length Prior to CLPU *
The number of minutes (0 to 255) that power must be
out for the CLPU to take effect. Defining this value as
recognized power outage.
Normal Mode Demand Interval LengthThe time in minutes (1 to 60) that each demand interval
lasts before a new interval begins. Valid interval lengths
are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60 minutes.
The time in minutes (1 to 60) that each Test mode
demand interval lasts before a new interval begins. Valid
interval lengths are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30,
Normal Mode Number of Subintervals*
The interval length divided by the sub-interval length is
equal to the number of subintervals. Valid entries are
from 1 to 10 and must be evenly divisible into the
demand interval length. For block demand, the number
Test Mode Number of Subintervals*
The interval length divided by the sub-interval length is
equal to the number of subintervals. Valid entries are
from 1 to 10 and must be evenly divisible into the
demand interval length. For block demand, the number
Register Full ScaleA kW demand value that defines the maximum rated
demand for a particular meter installation. Valid entries
Test Mode Timeout
The number of minutes the meter will remain in Test
function is active when Test mode has been activated via
remote communications. Valid entries range from 1 to 99
Operating Frequency*The operating frequency must be programmed to 50 Hz
Line or Crystal Sync*The real time clock can be synchronized off the input line
5-10CENTRON Meter Technical Reference Guide
The following items are for information purposes (see Table 5.4). All informational
data, except those items indicated by an asterisk, can be displayed in Normal and
Register Multiplier
A programmable value that is used in calculations of
setting the register multiplier equal to the CT ratio times
the PT ratio of the installation for primary read meters.
Note: Energy and demand display formats should be
Optical Communications Baud Rate*The optical communications default baud rate is 4800
Expansion Port Comm. Baud Rate*The expansion port communications default baud rate is
2400 baud; however, rates of 300, 1200, 2400, 4800,
*Indicates parameters that can be uploaded to a reading device but cannot be displayed.
Parameter Description
Item Description
(C1ST and C1SL only)The time and date that each maximum demand occurred
Time Remaining in (Sub) intervalThe amount of time in minutes and seconds before the end
Segment TestThe display illuminates all segments and selected
annunciators on the LCD in order to verify proper operation.
The watt disk emulator continues to function normally.
Two separate nine digit display items that can be used to
identify the meter with an alpha character displayed as a
displayed as the appropriate value.
Up to three separate user fields are available to display any
desired numerical information. Each user field can be up to
nine digits in length with an alpha character displayed as a
displayed as the appropriate value.
Firmware RevisionA sequential number identifying the firmware revision level
of the meter. This number is automatically provided and
CENTRON Meter Technical Reference Guide5-11
A sequential number identifying the revision level of the
software used to program the meter. This number is
automatically provided by the programming software and
Number of Times ProgrammedA counter identifying the number of times (up to 9999) the
Number of Power Outages A counter identifying the number of times (up to 9999) the
Number of Demand ResetsA counter identifying the number of times (up to 9999) a
Number of Days Since Demand Reset
(C1ST and C1SL only)A counter identifying the cumulative number of in service
Date and Time of Last Reset (C1ST and
C1SL only)The date and time of the last demand reset.
and C1SL only)The date and time the meter was last programmed.
Date (C1ST and C1SL only)The current date recognized by the meter
The current time recognized by the meter.
Note: For time of occurrence registers, time is displayed as
HH:MM:SS. All dates are displayed in the format chosen in
Day of Week (C1ST and C1SL only)A single digit denoting the current day of the week is
displayed where Monday is denoted by a one and Sunday
Time on Battery (C1ST and C1SL only)A counter identifying the cumulative number of minutes, 0
to 999,999, the meter has been in battery carryover mode.
Program ID NumberA three digit number identifying the program downloaded to
TOU Schedule ID Number (C1ST and
C1SL only)A three digit number identifying the TOU rate schedule
TOU Expiration Date *A date that indicates when the register’s TOU schedule will
Register Full Scale ValueA kW demand value that represents the maximum rated
demand for a particular meter installation. Exceeding this
Demand Threshold ValueA programmed threshold value in kW that determines when
Mass Memory Size * (C1SL only)The amount of mass memory actually being used for
recording of interval data. Valid entries are 0 to 32K, in 8K
Note: * Indicates parameter that can be uploaded to a reading device but cannot be displayed.
Item Description
5-12CENTRON Meter Technical Reference Guide
The following items shown in Table 5.5 can be displayed in Test mode.
Item Description
Time Remaining in the (Sub) intervalThe amount of time in minutes and seconds before the end
Maximum kWThe maximum demand since the meter was put into Test
mode. This value will be set to zero each time a demand
Previous kWThe kW demand of the previous Test mode subinterval/
Input Pulse CountThe number of pulses that have been received since the
Note: The display will be updated with each input pulse.
Previous Interval # of Input PulsesThe number of pulses received during the last complete
KWhThe energy accumulated in Test mode.
Present (Accumulating) kWThe calculated demand value as it increases from the start
of a demand test interval to the end of the subinterval/
Time Remaining until Test Mode
Timeout The amount of time in minutes and seconds before the
CENTRON Meter Technical Reference Guide5-13
A CENTRON meter can be programmed using an existing Series 200 program. This
procedure is a two-step process. First, export the 200 Series program you want to
use to a CENTRON file format and then import that file into PC-PRO+ as follows:
2SelectFile | Export.
The Export screen shown in Figure 5.5 is displayed.
3Select the 200 Series program to export from the list of availablePrograms.
The Program File Export Type screen is displayed.
5SelectCENTRON export format as shown in Figure 5.6 above.
The file you selected in Figure 5.5 is converted to a CENTRON format. The
program ID remains the same, but the file type becomes CENTRON.
5-14CENTRON Meter Technical Reference Guide
The Import screen shown in Figure 5.7 is displayed.
8Select the CENTRON program to import from the list of available EXP files.
The program is loaded into the Program Editor. Edit as necessary before
Demand Reset
A demand reset can occur in both Normal and Alternate modes.
•Through the optical port using a compatible programming device
•With the standard push-button demand reset switch located on the face of the
When a demand reset is initiated, the following events occur:
•As an indication of a demand reset, the display flashes all eights for six
•The current maximum demand values are added to the corresponding
•A self-read is performed (if selected).
•All Maximum Demand values are reset to zero. All corresponding times and
dates of maximum demands are cleared (C1ST and C1SL only).
•The number of in-service days since the last reset is set to zero.
•The time and date of the last reset is updated (C1ST and C1SL only).
•The normal mode display resumes. Exception is when in test mode, the display
As a security feature, additional manual demand resets are prevented for 60
When a demand reset is performed on a meter programmed for Block Demand, the current
interval becomes the first interval in the next billing period. For RollingDemand, all previously
completed subintervals are zeroed. The current subinterval becomes the first subinterval in the
next billing period. In Test mode, a demand reset will initialize the demand test interval.
CENTRON Meter Technical Reference Guide5-15
TOU Schedules
The Time-of-Use capability is available on the C1ST and C1SL personality modules.
It requires additional circuitry to store TOU schedule information and a battery for
time-keeping purposes during power outages. Schedule information is
programmed on a PC using the PC PRO+ software packages.
When using TOU functions on a meter, energy and demand registration are
segregated into time blocks during the day. Each time block can be one of four rate
periods. In addition to these four rate periods, a total rate is also available.
The calendar schedule contains all daily and yearly information necessary to
perform TOU metering. This schedule contains rate schedules, daily schedules,
seasons, holidays, and daylight savings time dates. For information on the entry of
these parameters into PC-PRO+, refer to the PC-PRO+ documentation.
Four independent rates are available for TOU registration-designated A, B, C, and
D. Only one of these rates can be active at a time. The Total register is always
active, regardless of the active rate period. The currently active rate is indicated by
Daily Schedules
Up to four daily schedules are available. Each schedule defines the beginning and
ending time of each of the four available rate periods (A, B, C, and D). Up to 32
switch points per rate may be specified for each daily schedule.
Weekdays, Saturday, Sunday, and holidays can be assigned to one of the four daily
schedules. Therefore, one to four daily schedules may be used in any combination
Seasonal Schedules
A season is a period of continuous days during the year when a particular rate
schedule is in effect. The year can be divided into a maximum of eight seasons. If
multiple seasons are not used, the TOU schedule contains one year-round season.
The Daily Schedules can be defined differently for each season. Up to eight Season
Change dates are specified for each year in the Calendar Schedule.
Season changes occur at midnight of the Season Change date (where midnight
corresponds to 00:00 hours) or can be programmed to occur at the first demand
reset following the Programmed Season Change date.
Up to twenty-two holidays can be designated per year in the Calendar schedule.
One of the four Daily schedules is assigned to each of the Holidays in the Calendar
5-16CENTRON Meter Technical Reference Guide
Daylight Savings Time switch points occur at 2:00A.M. on the first Sunday in April
and the last Sunday in October. These dates are pre-assigned in the Calendar
Schedule; however, they can be modified by the user. The user can also elect not to
recognize Daylight Savings Time and operate the meter in standard time only.
Current Season Register
All energy and demand registers selected for the active season are considered
current season registers. If a single rate schedule is applicable year-round, then
Last Season Registers
Last Season Registers are selected when two or more seasons are used during the
year. For every Current Season Register there is a Last Season Register for the
same quantity. Last Season Registers are designated LS in the programming
software. Last Season Registers can also be selected for display in Normal and
Operation
At the end of a specified season, all Last Season Registers are updated with
Current Season register data. The meter can be programmed to activate an
automatic demand reset at a season change. A season change can be programmed
to occur at midnight at the beginning of the programmed Season Change date or at
the first demand reset following the Season Change date.
The following events take place when an automatic demand reset occurs at season
•The Current Season energy registers are copied directly to the Last Season
•The Current Season maximum demand registers are copied directly to the Last
Season maximum demand registers and added to the cumulative demand
•After the demand reset, the maximum demand registers are reset to zero. Both
the cumulative and the continuous cumulative demand registers are copied to
the Last Season cumulative and continuous cumulative demand registers,
If there is no demand reset at season change, all current season registers are
directly copied to Last Season registers at season change but no current season
CENTRON Meter Technical Reference Guide5-17
Capacity
The C1SL module provides 32k bytes of EEPROM for one channel of interval load
profile data. The amount of installed EEPROM actually used for load profile
recording is programmable from 1 to 32k bytes in one kbyte increments.
The mass memory is configured for 12 bit data resolution. Equivalent pulse count
Bits = 12
Interval Lengths
The load profile records data on a block interval basis. The interval length is
programmable: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, or 60 minutes. This interval length is
independent of the interval length chosen for displayed demand quantities.
The C1SL module can flag an interval when a power outage exceeds a specified
number of seconds. The power outage duration is programmable from 0 to 255
Channel Configurations
The Load Profile register has one channel of interval load profile data. This
channel corresponds to kWh. The pulse constant is programmable from 0.02 to
99,999 watthours per pulse in 0.01 increments. This pulse constant applies to
secondary readings only. For example, a watthour pulse constant of 1.8
Some example pulse weight calculations:
If the customer pulls a 240V, CL200, singlephase, Form 2S electromechanical meter
Meter Kh = 7.2 watthours/disk revolution
then this electromechanical meter has the following pulse weight (PW):
34 bytes of the 32k bytes is reserved for firmware and software parameters.
PDR
disk revolution

4 pulses
------------------------------------

5-18CENTRON Meter Technical Reference Guide
If this meter is replaced by a Load Profile register of the same form number,
voltage and current ratings, and if the utility wants the register to operate the same
way, the pulse weight would be entered in the customer files as 1.8 watthours per
Example 2: Calculation of Pulse Weight
A Load Profile register on a singlephase, 240V, CL200, meter is programmed so that
kWh is recorded into mass memory. The maximum 12-bit data resolution is desired
First, calculate the maximum watthour accumulation during 15 minutes intervals:
The maximum number of pulses is 4095; therefore, the smallest pulse weight (PW)
Data Storage
The Load Profile register stores data in mass memory at the end of each interval.
This data stored is the pulse data for that interval. This process continues for each
interval until sixty intervals have been recorded. The mass memory is grouped into
segments of sixty intervals defined as a record or block. In addition to the profile
data, each record contains the following information:
pulse
=
Wh Max,12000 watt hours,=
4095P
Pulse
Time TagSpecifies the month, day, and hour of the end of the data
Power OutageStatus bit is set for each interval during which a power
Status BitsThere are four types of status bits written into each data
Time AdjustStatus bit set along with power outage bit when time is
Saturation Status bit is set when the pulse count for any interval in
RAM ErrorStatus bit is set if any memory address within the record
Field TestStatus bit is set if Test mode is activated during an interval.
Register ReadingsA register reading is maintained in the data record to be
used for data validation. This register reading is updated
CENTRON Meter Technical Reference Guide5-19
Use the following equation to determine the recording duration for the load profile
M= Memory size in kilobytes
Optional Features
Programming electronic detent prevents received energy from accumulating in the
delivered energy register. When detent is enabled, the received energy is
Expansion Port
A connector located on these personality modules provides the option of using
expansion modules (when available), such as the R300CD board in conjunction
with the C1SD, C1ST, and C1SL personality modules.
Register security can be provided with primary, secondary, and tertiary security
codes that prevent unauthorized communication with CENTRON products. A
Primary security code allows complete access to the meter. A Secondary security
code allows full read access with limited write access to perform an automatic
107
24
×=
Table 5.6 Recording Duration for 32Kb
(days)
2 25.50
10 127.50
30 382.50
5-20CENTRON Meter Technical Reference Guide
demand reset and to access the Alternate and Test modes. A tertiary security code
allows read-only access. For more information about security codes, refer to the
Calculations
Calculation of energy is continuously incremented by multiplying the energy pulse
weight by the measured energy. The energy pulse weight is calculated by the
The energy in a given interval is the product of the number of pulses received
Demand
Calculation of demand is always based on rolling or block intervals. Demand
calculations use three constants; the watthour constant (Kh), the demand interval
The weight of an incoming pulse is determined according to the following formula:
The demand in a given interval is the product of the number of pulses received
kWh Pulse Weightkwh
--------------

Energy kWh()Number of PulseskWh
--------------

kW pulse weight kw
--------------

Demand kW()Number of PulseskW Pulse Weight×=
CENTRON Meter Technical Reference Guide5-21
The Demand value is continuously compared against the stored maximum value. If
a demand value is greater than the corresponding maximum demand, it is saved as
the new maximum demand. If the demand value is less than the corresponding
maximum demand, it is discarded. At the beginning of an interval, the current
interval demand is reset to zero and new demand values begin accumulating.
Block Interval Demand
Block demand corresponds to the number of subintervals being equal to one. At
the end of every interval, the microprocessor compares the last completed block
interval demand value to the demand value in memory. If the new value is greater
than the stored value, the new demand value is stored as Maximum Demand. When
a demand reset occurs, maximum demands are reset to zero and the current
interval continues. C1SD will begin a new demand interval. New maximum
Rolling Interval Demand
For rolling interval demand, the programmed number of subintervals make up the
demand interval. At the end of every subinterval, the microprocessor calculates a
demand value based on the last full demand interval. When a demand reset occurs,
all Maximum Demands are reset to zero along with all completed subintervals. The
current subinterval continues (unless C1SD) accumulating data and the new
maximum demand value(s) is (are) calculated for the next subinterval.
When a demand reset is performed, Maximum Demand values are added to the
existing corresponding Cumulative Demand values and written into memory as the
new Cumulative Demand values. These values remain in storage until the next
Continuous Cumulative Demand
Continuous Cumulative Demand is the sum of Maximum and Cumulative Demand
at any time. The calculated interval demand is continuously compared to the
previous Maximum Demand. If this demand is a new peak, it is stored as a
Maximum Demand and adjusts the continuous cumulative register to reflect the
new demand. A demand reset signal clears the Maximum Demand value, but does
Previous Interval Demand
Previous interval demand is the calculated demand from the most recently
completed demand interval. When using rolling interval demand, this quantity is
updated after each subinterval. Previous interval demand is not saved in non-
volatile memory. When an interval is completed the demand value is transferred to
the previous interval demand register for display. Upon power up or demand reset,
the previous interval demand register is set to zero and is updated when the first
5-22CENTRON Meter Technical Reference Guide
The present interval demand value is the demand value at the present time
normalized to the demand interval length. Present demand reports the calculated
demand value as it increases from the start of a demand interval to the end of the
interval. For rolling demand intervals, present demand reports the calculated
demand value from the present subinterval as it is accumulating with the previous
Power Procedures
Personality Modules are powered directly from line voltage via the board-to-board
connector. These modules are energized when AC power is present. During power
outages, the permanently installed lithium battery runs the clock circuit on C1ST
and C1SL versions. The battery normally lasts for the life of the meter. However, in
the unlikely event of a low battery notification, the battery or Register Module may
Battery Life (Load Profile & TOU)
The CENTRON TOU and Load Profile personality modules have a permanently
soldered battery present on their circuit boards. This battery powers the clock
when power is disconnected from the meter. The module program is transferred to
The battery life is longer for the CENTRON TOU and Load Profile modules than
the J5 200 Series electromechanical hybrid meters. The capacity of the new battery
is larger than equivalent older products, and the current consumption is reduced
In the process of determining this factor, battery life calculations are made
assuming worst case conditions for both the battery capacity (at the lowest end of
the manufacturer published initial limit) and the meter current consumption
(assuming all the components are at the maximum side of their published
The battery is also assumed to be operating at a self-discharge rate equal to a
constant average temperature of 160°F. At this temperature the battery will lose 2%
of its capacity per year (see dashed curve in Figure 5.8).
The design assumes that a significantly higher average temperature would increase
the self-discharge and that a lower average temperature would lower the self-
The battery technology used is Lithium Thionyl Chloride. The battery life
calculations use a safety factor that takes into account the increase in battery
internal resistance as it approaches its end of life. This increase in internal
resistance occurs before the battery voltage starts decreasing under open circuit
conditions. This 80% limit for the maximum capacity usage is factored into the
DO NOT REMOVE THE ELECTRONICS’ HOUSING WHILE THE METER IS POWERED. LINE
LEVEL VOLTAGES ARE PRESENT ON THE CIRCUIT BOARD. FAILURE TO FOLLOW THIS
PROCEDURE COULD RESULT IN SERIOUS PERSONAL INJURY OR DEATH. THE
WARNING LABEL SHOULD ALWAYS BE VISIBLE ON THE HOUSING.
CENTRON Meter Technical Reference Guide5-23
Classical observation of the open circuitvoltage would lead to an overly optimistic
battery life and the likelihood of product failure before the detection circuit
tripped. SchlumbergerSema believes this is a major improvement in design
robustness to classical voltage detect circuitry and will avoid misleading
The curve in Figure 5.8 shows the CENTRON battery usage in amp-hours for the
chosen scenario. The total time over the 15-year life of the product takes a battery
carryover (no power applied) of 1 year (cumulative) and is shown as the initial
year on the graph. In reality, it will likely be spread over the life of the product.
Figure 5.8 shows there is significant margin available for the “on power operation”
at 15 years, even at the 80% limit curve (historically, the low battery would be
flagged at the battery capacityline). When 20% of the battery capacity remains, the
internal resistance starts increasing exponentially, and the current characteristics
of the battery degrades as can be seen from the chart.
With the assumption that the “low power mode” is used when the meter is not in
field operation (entered from a three button reset), the current drain from the
battery has the same value as the current drain under AC power which means an
A register displays the Low Battery error code (Er 000001) if the minutes-on-
battery counter exceeds 525,600 minutes (1 year). The battery is no longer good
when the Worst Case Battery Usage line crosses the 80% maximum usage line.
This means that the battery life for the CENTRON is a conservative estimate of 15
years with or without the 365 days (12 months) of continuous carryover.
Meters shipped from the factory unprogrammed or meters removed from the field and given a
3-button reset will not use battery carryover time.
5-24CENTRON Meter Technical Reference Guide
Three Button Reset
To perform a three button reset, follow these steps:
2Remove the meter cover.
3Activate the magnetic reed switch using a small magnet positioned at the 10
4Depress the test mode button and the demand reset button.
5Apply power to the meter while simultaneously performing steps 3 & 4.
6Remove the magnet; release the test mode and demand reset buttons after 3
7The meter display should alternate between CNTRON and Segment Test if
8Replace the meter cover.
Performing a three button reset returns selected program parameters to a default state.
CENTRON Meter Technical Reference Guide5-25
CENTRON R300CD Operation
The R300CD option provides two RF transmission messages for energy and
demand readings. It is programmed with two unit ID’s, one for identifying energy
(kWh) related Standard Consumption Messages (SCMs), and one for demand
(kW). The even ERT ID number will always correspond to the energy value, and
the odd ID will always correspond to the demand value. Only the even ID number
will be displayed on the meter nameplate, and the demand ID will be the next
The R300CD transmits two different types of SCMs representing energy and
demand. This is the only mode of operation used by the R300CD. R300CD option
boards must be installed in a Time-of-Use (TOU) equipped (battery and full
calendar clock capability) CENTRON. The R300CD will interrogate the TOU
module once per minute and read the self read kWh and self read kW values. These
values will typically change only once per billing period.
The kWh value broadcast in its SCM shall have six (6) significant digits. The
R300CD converts the floating point BCD kW reading extracted from the
CENTRON self read register to a fixed implied decimal with two digits of
resolution to the right of the decimal point (.01 kW). The maximum kW measured
Figure 5.9 on page 5-26 is a block diagram of R300CD hardware. R300CD hardware
consists of two option boards: a control section and RF section. The control
section communicates to the TOU module at rate of once per minute using the
expansion port on the TOU module. The communication speed is fixed at 2400
baud in the control section and uses the SCS protocol. In each of the two SCMs
described, the respective parameter reported is converted to a binary format for
the RF transmission. No register information is saved in the R300CD option
boards. In the instance of a power outage, the option board will update the kW and
kWh values from the self read register upon power restoration.
The R300CD features the SchlumbergerSema patented method of tamper detection
that senses both meter removal and inversion. The removal tamper (RTPR)
increments a counter each time the meter is abruptly removed from a live meter
socket. The tamper counter utilizes a tilt switch to detect when the meter is
removed from the meter socket. The inversion tamper (ITPR) increments a
separate counter each time the meter senses an inversion. The inversion tamper
will be incremented when an inverted status is detected through a closed tilt
switch upon power up. Each of these tamper indications are then transmitted
5-26CENTRON Meter Technical Reference Guide
Figure 5.9 CENTRON TOU Personality Module with R300CD Option
In order for the R300CD meter to operate properly, you must set certain
parameters. Incorrectly set parameters will result in improper operation of the
The R300CD option boards use either a Load Profile (LP) or Time of Use (TOU)
CENTRON personality module. In order for the R300CD to transmit it must have a
Meter Base
Control
TOU
For detailed programming instructions, see the PC-PRO+ documentation. Also refer to the
Chapter 6Operation: C1SR Version
The SchlumbergerSema CENTRON C1SR is a one-way, unlicensed radio frequency
(RF) personality module that attaches to the CENTRON meter base (See Figure
6.1). It offers a cost-effective solution for the endpoints in automatic and off-site
meter reading applications. The CENTRON C1SR operates similar to the existing
R300 module that is utilized by the J5 electromechanical meter.
Utilizing the 96-bit iTRON® Standard Consumption Message protocol (SCM), the
C1SR provides the energy (kWh) consumption, module ID number, tamper
indications, meter type, and error checking information in each radio frequency
transmission. Within the 96-bit SCM, 26 bits are allocated to the module ID number
for meter identification (also referred to as ERT ID number). As of October 15,
1999, all CENTRON C1SR meters utilize 26-bit identification numbers.
The C1SR uses frequency hopping and transmits within the unlicensed 910 to 920
MHz band on an average of once per second. In order to avoid interference from
other devices, the transmission frequencies and time interval between
transmission cycles are completely random in nature.
The C1SR is factory programmed with tuning information, module ID, tamper
indicators (ITPR and RTPR), meter type, energy consumption, and scaling factor.
The program and all register information are stored in non-volatile memory in the
event of a power outage. Upon power restoration, all of the information in the non-
volatile memory is restored to the appropriate registers.
6-2CENTRON Meter Technical Reference Guide
The C1SR personality module is constructed of a flame retardant printed circuit
board material which supports the discrete, surface-mounted, and integrated
circuit components. A microstrip etched on the circuit board serves as the RF
antenna. The C1SR personality module easily snaps into the meter module
mounting bracket. This module is then electronically attached to the metrology
board via a board to board connector. The following information is sent to the
•Line voltage
•Energy flow direction
•Line frequency
The C1SR contains contacts on the module board, located at the 12 o'clock
position behind the LCD, for resetting the energy register and tamper counters.
This can be accomplished with the ZRO-C2A Resetter.
The C1SR uses a unique module identification number, provided by iTRON. This ID
number is contained in each message transmission and is used by the handheld
and billing system to determine meter identity and location. This ID number, which
is contained on a bar-coded label, is placed on the LCD housing directly above the
Registers
The C1SR personality module is only available with a liquid crystal display, LCD.
This module can be configured to display either four or five digits of energy
consumption and will rollover at 100,000 kWh for both self-contained (Form 1S, 2S,
12S, 25S) and transformer rated meters (3S, 4S). The self-contained meters can be
programmed to display normal kWh consumption (5X1 register configuration) or
tens of kWh consumption (4X10 register configuration). If the C1SR is
programmed for a 4x10 display, a “Mult by 10" label is placed on the module to the
left of the LCD display. Thus, the actual energy consumption is obtained by
The transformer rated meters can be programmed to display either a 5xTR or
4xTR. In order to determine the actual energy consumption, the display reading
needs to be multiplied by the transformer ratio (TR). If the transformer ratio is 1,
then the reading on the display is the actual energy consumption.
Regardless of the register configuration, the transmitted energy will always be in a
The LCD display contains an electronic load indicator (or watt disk emulator). The
load indicator is a single downward pointing triangle that flashes at a rate equal to
the energy consumption. The indicator flashes ON for 1 Wh and OFF for 1 Wh. This
effectively produces an equivalent Kh of 2.0. The LCD is automatically adjusted for
CENTRON Meter Technical Reference Guide6-3
The C1SR module displays energy in increments of whole values of kWh. Standard
operation for this module is to accumulate both forward and reverse energy flow
in the positive direction. However, the C1SR personality module is available with
an electronic detent that will cause the meter to ignore reverse energy flow.
Therefore, if the meter is inverted, the registers will accumulate in the forward
direction only, thus providing uni-directional operation. At the time of order, the
C1SR module can be selected to have a detent register.
When the meter is undetented, both forward and reverse energy will be
accumulated. Therefore, the electronic load indicator will flash at a rate equal to
the energy consumption, regardless of the direction of the energy flow.
When the electronic detent is enabled, only forward energy flow will be
accumulated. Thus, the single load indicator will not flash, nor will the meter
Resetting Values
The ZRO-C2A Resetter zeros both the energy registers and tamper counters by
direct connection to the C1SR module See also The ZRO-C2A Handheld Meter
Resetter for the CENTRON C1S and C1SR Operating Instructions.
A transmission cycle contains a wait period before and after each message burst
and a period of random silent time. The silent time is determined by the scaling
factor, which sets a minimum and maximum silent time between each
The transmission frequencies (within the 910-920 MHz band), the frequency
hopping pattern, and the time interval between transmission cycles are completely
random in nature. This randomness provides a method for avoiding interference
with transmissions from other devices. Figure 6.2 shows an example of the
CENTRON C1SR transmission cycle containing one message burst.
Figure 6.2 CENTRON C1SR Transmission Cycle
6-4CENTRON Meter Technical Reference Guide
The C1SR communicates in the unlicensed, 910-920 MHz band governed by the US
Code of Federal Regulations (CFR) Title 47, Part 15 Radio Frequency Devices, Sub
Tamper Detection
The CENTRON C1SR features the SchlumbergerSema patented method of tamper
detection that senses both meter removal and meter inversion. The removal
tamper (RTPR) increments a counter each time the meter is abruptly removed
from a live meter socket. The tamper counter utilizes a tilt switch to detect when
The inversion tamper (ITPR) increments a separate counter each time the meter
senses reverse power flow caused by meter inversion. The metrology board senses
reverse power flow and sends this status to the C1SR module. Although the C1SR
increments an inversion counter when reverse power flow is detected, the meter,
when undetented, will still accumulate the energy consumption in the positive
direction. Each of these tamper indications, along with the kWh consumption, is
then transmitted through the radio frequency transmission.
In order to test the power removal counter, the meter must sense a shaken
1Place the meter in a socket.
3Remove the meter from the live socket.
The meter has incremented the removal tamper counter.
The C1SR uses the power outage (the meter being removed from a live socket) in
conjunction with the meter being shaken simultaneously to increment the power
In order to test the inversion counter, the meter must sense reverse current flow.
1Place the meter in the meter socket inverted (test LED pointing down).
2Apply a load to the meter in the forward direction.
The meter has incremented the inversion counter due to reverse energy flow
The inversion counter increments when the meter senses reverse current flow. The
metrology board senses reverse power flow and sends this status to the C1SR
personality module. The C1SR then increments the counter and transmits the
As part of the 96-bit Standard Consumption Message, 4 bits are allocated for
tamper indications, which include the power removal and meter inversion
counters. The ReadOne Pro handheld reader converts the 4 bit binary number to
Changes or modifications not expressly approved by SchlumbergerSema Inc. could void
CENTRON Meter Technical Reference Guide6-5
its equivalent value between 0 and 15. Table 6.1 shows the removal and inversion
information based on the reported tamper count. For example, a tamper count of 6
on the ReadOne Pro would translate as 1 meter removal and 2 meter inversions
Retrofitting the C1SR Personality Module
The CENTRON R300 is a one-way radio frequency personality module that
transmits within the unlicensed 910-920 MHz frequency band governed by the US
Code of Federal Regulations (CFR) Title 47, Part 15 Radio Frequency Devices, Sub
Part C Paragraph 249 Intentional Radiator. Any device operating within this
unlicensed frequency band must contain an FCC Identification number. Therefore,
the FCC ID Label included in the Retrofit Kits must be placed on the meter as
Table 6.1 ReadOne Pro Tamper Count
Count Inversion Removal
00011 1 0
00113 3 0
01015 1 1
01117 3 1
10019 1 2
1011 1132
1101 1313
1111 1533
Changes or modifications not expressly approved by SchlumbergerSema could void the user’s
6-6CENTRON Meter Technical Reference Guide
To retrofit an existing meter with an R300 module, follow "Retrofitting with
Personality Modules" on page 2-3 and attach FCC Label on the left side of the inner
cover at the 9 o’clock position as illustrated in Figure 6.3.
FCC Label
Chapter 7Operation: C1SC Version
The SchlumbergerSema C1SC is a one-way transmitter used for fixed network
applications. The C1SC uses CellNet RF technology. The personality module
transmits a formatted data packet consisting of the preamble, the utility billing ID,
kWh information, and Cyclic Redundancy Checks (CRC) to ensure message
integrity. The module also features built in power outage notification, reverse
power flow detection, power restoration notification, and redundant
transmissions. The C1SC uses spread spectrum to broadcast its message in the 902
to 928 MHz frequency range once every five minutes.
The C1SC is factory programmed to include the utility billing ID, LAN Address ID,
and Register configuration. The utility billing ID is a value decided upon by the
utility and CellNet. The LAN address is a value assigned by SchlumbergerSema,
and programmed by SchlumbergerSema, to every meter within the network. LAN
addresses and utility billing IDs are unique to each meter. SchlumbergerSema
activates the LAN ID upon receipt of the meter association file from
After programming, the module is tested to verify the operating system parameters
and FCC compliance. A final test is performed via RF to verify a correct LAN
Figure 7.1 C1SC
7-2CENTRON Meter Technical Reference Guide
The C1SC is constructed of a flame retardant, glass-filled printed circuit board
material which supports the discrete, surface-mounted, and integrated circuitry
components. A slot antenna etched on the circuit board serves as the RF antenna.
The C1SC board snaps into the meter register mounting brackets to ease in the
installation of the board. The LAN address barcode and interpretation is placed on
The C1SC personality module is attached to the metrology board using a board to
board connector. The following information is passed from the metrology board to
•Line Voltage
•Energy Flow direction
•Line frequency
The C1SC has two additional labels called the meter change-out labels that are
affixed to the bottom of the meter. The change out labels are identical and contain
the AEP barcode information and a utility descriptor.
The RF transmission is spread spectrum using Binary Phase Shift Keyed (BPSK)
modulation. A chipping signal is used to spread the carrier and actual data is on-
off-keyed (OOK). The modulator output drives the amplifier chain that provides a
signal of approximately 100mW. The antenna is tuned for maximum efficiency at
Figure 7.2 shows how messages are typically transmitted. In the example, an
interval packet made up of 18 intervals is transmitted every five minutes. Each
interval contains a pulse count equivalent to the energy consumption for a 2.5
minute interval. The interval packet transmission represents a sliding 45 minute
Also shown in Figure 7.2, Interval packet 0 shows that the 2.5 minute interval is
transmitted in one of the 18 packets of 2.5 minute information. Interval packet 1 is
transmitted 5 minutes later and the selected 2.5 minute interval of data is now
transmitted as the 16th packet (numbered 15). The following packet slides the
information by two 2.5 minute intervals and continues for a total of nine
transmissions. The information is then no longer in the sliding 45 minute window.
CENTRON Meter Technical Reference Guide7-3
FCC Regulations
The C1SC communicates in the unlicensed 902-928 MHz band governed by the US
Code of Federal Regulations (CFR) Title 47, Part 15, Subpart C, Paragraph 247.
This device complies with Title 47, Part 15, Subpart C, Paragraph 247 of the FCC
Display Functions
The LCD is configured for five digits of energy consumption and will rollover at
100,000 kWh. The LCD is automatically adjusted for contrast over the operating
A watt disk emulator is located on the lower right hand corner of the display. The
indicator consists of three triangles that light up sequentially left to right to
indicate forward current flow. One full rotation of the three indicators is equivalent
0
0
Time
(Pulses)
01
21
41
6
Interval 1
Interval 3
Interval 5
Interval 7
Interval 9
7
2.5 minutes
Resolution)
Intervals close every 2.5 minutes
Transmissions are randomized over 5 minute period.
Each interval is transmitted nine times, thus nine times the redundency.
ELL
ET
LECTRICITY
NTERVAL
ELEMETRY
01
21
41
61
01234567891
11
31
51
7
01
21
41
61
01234567891
11
31
51
7
01
21
41
61
0 1 2 3 4 56 7 8 9 1
11
31
51
7
01
21
41
61
01234567891
11
31
51
7
01
21
41
61
0
0
Time
(Pulses)
01
21
41
6
Interval 1
Interval 3
Interval 5
Interval 7
Interval 9
7
2.5 minutes
Resolution)
Intervals close every 2.5 minutes
Transmissions are randomized over 5 minute period.
Each interval is transmitted nine times, thus nine times the redundency.
ELL
ET
LECTRICITY
NTERVAL
ELEMETRY
01
21
41
61
01234567891
11
31
51
7
01
21
41
61
01234567891
11
31
51
7
01
21
41
61
0 1 2 3 4 56 7 8 9 1
11
31
51
7
01
21
41
61
01234567891
11
31
51
7
01
21
41
61
7-4CENTRON Meter Technical Reference Guide
The C1SC can be reset using the CellNet Shooter device in conjunction with a
Programming the C1SC/CN1SC
The CENTRON C1SC/CN1SC CellNet personality module programming port is
located such that the CENTRON inner cover does not have to be removed when
In order to communicate with the CENTRON CellNet module, insert the
programming slide into the hole in the inner cover of the CENTRON meter that is
located at the 12 o’clock position (see Figure 7.3).
Chapter 8Testing, Troubleshooting, and Maintenance
This section provides information and instructions to help you test and maintain
•Testing support features
•Recommended testing procedures
•Field testing
• Maintenance
Infrared Test LED
The CENTRON meter is equipped with an Infrared Test Light Emitting Diode
(LED) where each pulse represents a fixed value of watthour measurement. The
LED is located on the top of the meter as the meter is viewed from a typical
installation (see Figure 8.1). The pulse weight represented by the LED pulses is 1.0
Figure 8.1 LED Location
An optional pulse detector is available for the CENTRON meter. The pulse detector
has an infrared pickup with 2 visible LEDs. When positioned over the CENTRON
light pipe, it will produce a visible flash when an infrared pulse is received from the
metrology. The right LED will flash once for each infrared Wh pulse while the left
8-2CENTRON Meter Technical Reference Guide
LED will flash once for every 10Wh infrared pulses received. The left LED on the
pulse detector is helpful when heavier loads are present on the system being
examined. This can be used to verify that the metrology is measuring energy when
installed and to conduct timing tests to determine the amount of load on meter. See
Figure 8.2 Pulse Detector
Watthour Annunciators
C1SR meters (and some C1S versions) are equipped with LCD displays that utilize
a single flashing triangular annunciator to show that power is being metered. The
annunciator represents 1.0 watthour each time it turns on and 1.0 watthour each
On other CENTRON meters equipped with LCD’s, there are 3 such annunciators
which also show the direction of energy flow (C1S, C1SC, C1SD, C1ST, C1SL). The
triangles will scroll left to right for positive (line to load) energy flow, and right to
The Kh value of the single triangle is twice the Kh of the LED and, therefore, 2.0
watthours per pulse. On the three triangle units the Kh of each triangle is further
multiplied by 3 as each triangle is turned on and off in sequence, resulting on a Kh
TOU Rate Annunciators
The CENTRON meter is equipped with 5 Time-of-Use annunciators on the LCD
(see Figure 8.3). Located on the right side of the display, the annunciator A, B, C, D,
or TOTAL flashes when the applicable rate is active and is enabled to display their
respective values. (Available on the C1ST and C1SL.)
CENTRON Meter Technical Reference Guide8-3
Test Mode Annunciator
The CENTRON meter is equipped with a Test Mode LCD annunciator located in
the left portion of the display. This annunciator is enabled when Test Mode is
activated. The word TEST appears on the display and flashes at a steady rate when
test mode is activated. (Available on the C1SD, C1ST, and C1SL.)
The CENTRON meter is equipped with an Infrared Test LED (Light Emitting
Diode) which is located on the top of the meter at the 12 o’clock position.
The pulse weight represented by the LED pulses is always 1.0 watt-hour per pulse.
Since the Kh value for the meter is 1.0, make sure the test board is programmed to
1 pulse = 1 Watt-hour as compared to 1 pulse = 7.2 Watt-hours in
To obtain test uncertainties of 0.01% (plus the uncertainties of the test equipment),
use a minimum of 30 pulses.With a constant load applied (real or phantom), the
LED pulses are compared to the output of a high accuracy watthour standard. This
is accomplished using a compatible optical pickup and a comparator.
1Apply a constant delivered watts load (Wapp) to the meter.
2Verify that the LED pulses properly either by counting the pulses or using a
comparator to compare the pulses from the meter under test to the standard.
To determine the number of pulses per second, use the following equation:
1S & 2S CL200120V 3S,
240V 4S
CL 320
Light Load1067
8-4CENTRON Meter Technical Reference Guide
The CENTRON meter is capable of visually being tested by using the Watt Disk
Recommended Energy Testing Procedures
Testing solid-state meters on test boards that were designed primarily for
electromechanical meters may give unexpected results. Erroneous readings have
been known to occur on “light load” tests when the test sequence calls for said
light load test to follow immediately after the full load test. The problem is caused
by improper “jogging” and can be avoided by sequencing the test in order of
applied power such that the lowest power is tested first. This problem does not
exist on modern test boards with the latest test software.
Table 8.1 shows the AEP Test Codes.
Field testing of the CENTRON meter may be accomplished with conventional
methods using either the infrared test LED or the disk emulation annunciator
(when supplied). For details on the operation of the annunciator, see Page 8-2.
The typical field test setup consists of a phantom load, portable standard, and an
infrared test pulse adapter with a counter or snap switch assembly. CENTRON
meters purchased without a test link will require a more sophisticated loading
Number of Pulses per secWapp1hr
------------1Kh××=
Meter SpecificationCode
CL100 120V 2W 1 Phase Type C1S 15TA 1.0Kh FM1S 60Hz 2B
CL200 240V 3W 1 Phase Type C1S 30TA 1.0Kh FM2S 60Hz 1N
CL320 240V 3W 1 Phase Type C1S 50TA 1.0Kh FM2S 60Hz 2J
CL20 240V 2W 1 Phase Type C1S 2.5TA 1.0Kh FM3S 60Hz2F
CL20 120V 2W 1 Phase Type C1S 2.5TA 1.0Kh FM3S 60Hz2E
CL20 240V 3W 1 Phase Type C1S 2.5TA 1.0Kh FM4S 60Hz2G
60Hz 2H
60Hz 2I
CENTRON Meter Technical Reference Guide8-5
Error Codes (R300)
Fatal Error
The firmware performs error checks to confirm proper register operation. Table
8.2 lists possible errors and associated error codes.
Fatal errors cause the display to lock on the error code. If multiple fatal errors
occur, the one that was detected first will be the error code that locks on the
CauseEffect Indication
Energy Register
continues energy
cleared after a power cycle.
annunciator, a downward
right hand corner.
Unsuccessful writing to or
memory.
are halted. Return the module
The LCD will display the word
used for energy
Metrology error.
are halted. Return the meter
repair.
Error in the area normally
accumulation.
ErrorError CodeError Type
EEPROMEr 000010Fatal
ClockEr 010000Non-fatal
TOU ErrorEr 020000Non-fatal
Metrology ErrorEr 000004Fatal
8-6CENTRON Meter Technical Reference Guide
Non-fatal errors can be programmed to scroll during the one second display off-
time or lock on the register display. If multiple non-fatal errors occur, the meter
will display a combined error message. For example, if a low battery error and a
clock error exist, the error display will read ER 010001. In this case, if one of the
errors had been programmed to lock, and the other error had been programmed to
scroll, the display will lock on the combined error message.
Activating the Alternate Mode Magnetic Reed Switch allows the Normal Mode
Display Sequence to scroll one time during a locked non-fatal error. At the end of
the display sequence, the error message locks onto the display again.
Table 8.3 Non-Fatal Error Codes
Er 000001Low Battery ErrorNumber of minutes on the battery has exceeded one year-
replace module—checked on power up and once per second.
A low battery check is performed once every second. If a low battery level is detected
during this procedure, error code Er 000001 is displayed in Normal mode. This error can
be programmed to continuously scroll during the one second display off-time or lock on
the register display. A low battery continues to function; however, its reliability decreases
If a low battery level error occurs during normal operation, TOU and Mass Memory will
continue to operate until an outage occurs. If a low battery level is detected upon
programming or upon restoration of power after an outage, ER 000001 will display. Total
registers remain functional during a Low Battery Condition; however, TOU (rates A, B,
C, D) registers and load profile will not accumulate.
Error Reverse Direction Error Indicator—Clear on demand reset or
Discussion:
A Reverse Direction error exists when the register detects 10 Wh in the reverse
direction. Reverse Direction detection is a selected feature during programming. If a
Reverse Direction error occurs, Er 007000 is displayed during the one second off-time
The Reverse Direction error will clear when a demand reset is performed.
Er 010000Clock ErrorClock Error—Reprogram register and check for proper
operation; checked upon programming and once per second
A Clock error exists when a clock parameter is determined to be out of range. If this
error occurs, Er 010000 is displayed in Normal mode. This error is programmable to
continuously scroll during the one second display off-time or lock on the register display.
If a Clock error occurs, the Load Profile and TOU operations will be discontinued until
the meter is reprogrammed. The error will then clear, and the meter will resume normal
Er 020000TOU Error TOU Error—Reprogram register and check for proper
operation; checked upon programming and once per second
A TOU error occurs when the TOU calendar is out of range. TOU is disabled.
Er 030000Load Profile Error Load Profile Error—Reprogram register and check for proper
operation; checked upon programming and once per second
CENTRON Meter Technical Reference Guide8-7
Discussion:
A Load Profile error occurs when the Load Profile parameter is out of range or inactive.
Error
Programmed Full Scale Value exceeded—Check programmed
Full-Scale value and meter installation for proper sizing of
Discussion:
A Full Scale overflow error exists when the calculated demand at an EOI exceeds the
register Full Scale value. The register Full Scale value is selected during programming.
If an overflow occurs, the error code Er 100000 is displayed in Normal mode. This error
is programmable to display during the one second display off-time or lock on the register
The Full Scale overflow error displays when the overflow occurred. The Maximum
Demand register continues to accumulate and display kW as long as the format
limitations are not exceeded. When a demand reset is performed, the correct Max kW
value will be added to the cumulative registers and the error code will no longer be
displayed. If a Full Scale overflow occurs, check the installation to ensure that the
current metering capability has not been exceeded. A Full Scale overflow in no way
Table 8.4 Fatal Error Codes
Er 000004Metrology Error(Available in firmware revisions 10.27 and above.) Defective
component in the base metrology causing invalid energy pulse
Discussion:
The direction of energy flow signal is monitored for rate of change. If the rate of change
exceeds 14 Hz, the metrology error is triggered. Under this condition the base metrology
has become defective and the energy pulse signal being sent from metrology to the
D/T/L module is no longer valid. Base metrology should be replaced in the event of this
Er 000010EEPROM Error
Energy value checksum failure; EEPROM failure—reprogram
module and check for proper operation. If error still does not
clear, replace module; checked upon programming and at
Discussion:
If the module has an EEPROM error, the error code ER 000010 will be continuously
displayed. If this error occurs, program the module and check for proper operation. If the
Table 8.3 Non-Fatal Error Codes
8-8CENTRON Meter Technical Reference Guide
Due to the modular architecture of the CENTRON meter, modules of similar
voltage (120V or 240V) may be interchanged. Therefore, the personality module of
the CENTRON you are troubleshooting can be placed on a known working base to
verify proper operation of the personality module. Likewise, a known working
personality module may be placed on the base of a meter to verify proper
This section provides a list of the most likely problems that you may encounter,
Blank Display
No Accumulation of kWh or kW
Power Not Applied to MeterApply power.
LCD/LCD Driver FailureReplace Register Circuit Board.
Loose Power Supply ConnectionRemove and re-seat board-to-board connector.
Time/Date Wrong in PC or Handheld device
Verify and update time/date in programming device
appropriate software manual for more detailed
Wrong Line FrequencyVerify proper line frequency is selected in Setup
frequency and reconfigure meter.
Battery Failure During Power OutageReplace module.
Correctly Verify DST is selected in program. Reconfigure
Timekeeping circuitry component failureReplace module.
Demand Delay Selected
outage if CLPU (Demand Delay) has been selected.
Delay has expired. Verify register program and
Module was left in Test modeAccumulation of kW or kWh will not take place while
register is in Test mode. Exit Test mode and verify
Module Not Receiving PulsesVerify that meter is accumulating energy by testing
Time-of-Use Schedule programmed
Verify TOU schedule contains continuous 24-hour
periods for all weekdays, weekends, or holidays. All
accounted for within the TOU schedule.
CENTRON Meter Technical Reference Guide8-9
Reed Switch Does Not Activate the Alternate Mode
Demand Reset Cannot be Initiated Through PC or Handheld
Cause Solution
Optical Probe Cable Assembly Failure
communicates. Check cable against known cable
that is functioning. Also check batteries in cable
Com Port in PC is Set WrongVerify proper Com Port number has been selected
in the programming software. If the wrong Com Port
Security code in Module
register, the programming device must have the
Verify security codes in the programming software.
Verify Optical Probe lines up properly over the
alignment. Verify PC or handheld and cable are
securely connected and attached to the correct Com
Optical Connector FailureReplace cover assembly.
Incorrect Baud RateOptical port can be programmed to operate at 4800
Cause Solution
Magnetic Field is too WeakPlace magnet closer to switch or use stronger
Reed Switch FailureReplace module.
Alternate Mode Items Not SelectedRe-program meter with items to be displayed in
Cause Solution
Initiate Demand ResetRe-install or Replace cover assembly.
Reset Has Occurred Within Last 60 SecondsManual demand reset cannot occur within 60
seconds and perform a second Demand Reset.
Cause Solution
Communication Cannot Be EstablishedSee Programming Problems.
8-10CENTRON Meter Technical Reference Guide
Test Mode Switch Does Not Place Module in Test Mode
Blank Display
Switch Not Fully DepressedVerify that the test mode pushbutton has been
Switch or Electronic FailureReplace module.
Test Mode Items Not SelectedRe-program module with items to be displayed in
Cause Solution
Loose power supply connectionRemove and re-seat board to board connector.
LCD/LCD Driver failureReplace Register circuit board.
uploaded with the ZRO-C2A.
Chapter 9Specifications and Drawings
C1S
ClassVoltsWire FormRegisterDigits/
Specification Number
10012021SCLOCK5X1980300000-000 980310000-000
10012021SCYCLO5X1980340000-000 980350000-000
10012021SLCD w/Segment Check5X1980380000-000980390000-000
Check 5X1984540000-000 984550000-000
10012021SLCD w/Segment Check4X10980400000-000980410000-000
20024032SCLOCK 4X10980020000-000980030000-000
20024032SCYCLO4X10980060000-000 980070000-000
200240 32SLCD w/Segment Check5X1980080000-000980090000-000
Check 5X1984090000-000 984100000-000
200 24032SLCD w/Segment Check4X10980100000-000980110000-000
32024032SCLOCK 4X10981160000-000981170000-000
32024032SCYCLO4X10981200000-000 981210000-000
9-2CENTRON Meter Technical Reference Guide
320240 32SLCD w/Segment Check5X1981220000-000981230000-000
Check 5X1983950000-000 983960000-000
320 24032SLCD w/Segment Check4X10981240000-000981250000-000
2012023SCLOCK 4X10980560000-000980570000-000
2012023SCYCLO4XTR 980600000-000980610000-000
20120 23SLCD w/Segment Check5XTR980620000-000980630000-000
Check 5XTR985590000-000 985600000-000
2012023SLCD w/Segment Check4XTR980640000-000980650000-000
2024023SCLOCK 4XTR980680000-000980690000-000
2024023SCYCLO4XTR980720000-000 980730000-000
2024023SLCD w/Segment Check5XTR980740000-000980750000-000
Check 5XTR985610000-000 985620000-000
2024023SLCD w/Segment Check4XTR980760000-000980770000-000
2024034SCLOCK 4XTR980800000-000980810000-000
2024034SCYCLO4XTR 980840000-000980850000-000
2024034SLCD w/Segment Check5XTR980860000-000980870000-000
Check 5XTR985630000-000 985640000-000
2024034SLCD w/Segment Check4XTR980880000-000980890000-000
200120312SCLOCK 4X10980920000-000980930000-000
Table 9.1 C1S Specification
Mult
Glass Poly
CENTRON Meter Technical Reference Guide9-3
200120312SCYCLO4X10 980960000-000980970000-000
200120312SLCD w/Segment Check5X1980980000-000980990000-000
200120312SLCD w/Segment Check5X1983930000-000983940000-000
200120312SLCD w/Segment Check4X10981000000-000981010000-000
200120325SCLOCK 4X10981040000-000981050000-000
200120325SCYCLO4X10 981080000-000981090000-000
200120325SLCD w/Segment Check5X1981100000-000981110000-000
Check 5X1985650000-000 985660000-000
200120325SLCD w/Segment Check4X10981120000-000981130000-000
ClassVoltsWire FormRegisterDigits/
Specification Number
Table 9.2 C1SR Specifications
Mult
Glass Poly
10012021SR3004X10981520000-000 981530000-000
20024032SR3004X10980140000-000 980150000-000
32024032SR3004X10981760000-000 981770000-000
2012023SR3004XTR981560000-000 981570000-000
2024023SR3004XTR981600000-000 981610000-000
9-4CENTRON Meter Technical Reference Guide
C1SD
200120312SR3005X1981660000-000 981670000-000
200120325SR3005X1981700000-000 981710000-000
Table 9.2 C1SR Specifications
Mult
Glass Poly
ClassVoltsWire FormRegisterDigits/
Specification Number
10012021SCellNet5X1980420000-000 980430000-000
2012023SCellNet5XTR981260000-000 981270000-000
2024034SCellNet5XTR981340000-000 981350000-000
200120325SCellNet5X1981420000-000 981430000-000
Table 9.4 C1SD Specifications
Number
200240 32SDemandPOLY980200000-000
CENTRON Meter Technical Reference Guide9-5
32024032SDemand POLY 981840000-000
20 24023SDemandPOLY981800000-000
200120312S DemandPOLY981820000-000
Table 9.4 C1SD Specifications
Number
ClassVoltsWire FormRegisterCoverSpecification
1001202 1S TOUPOLY981850000-000
32024032STOU POLY 981910000-000
20 24023STOUPOLY981870000-000
2001203 12S TOUPOLY981890000-000
9-6CENTRON Meter Technical Reference Guide
C1SL
ClassVoltsWire FormRegisterCoverSpecification
1001202 1S TOU with
200240 32STOU with
320240 32STOU with
20120 33STOU with
20 24023STOU with
20240 34STOU with
2001203 12S
R300CD POLY 983170000-000
R300CD POLY 983600000-000
ClassVoltsWire FormRegisterCoverSpecification
1001202 1S Load ProfilePOLY981920000-000
32024032SLoad ProfilePOLY 981980000-000
20 24023SLoad ProfilePOLY981940000-000
CENTRON Meter Technical Reference Guide9-7
Figure 9.1 Form 1S Wiring Diagram
200120312S Load ProfilePOLY981960000-000
Table 9.7 C1SL Specifications
Number
10
10
++
9-8CENTRON Meter Technical Reference Guide
Figure 9.3 Form 3S Wiring Diagram
102
102
LOAD
CENTRON Meter Technical Reference Guide9-9
Figure 9.5 Form 12S Wiring Diagram
positions of
jaw
Alternate positions
terminal
9-10CENTRON Meter Technical Reference Guide
Figure 9.6 Form 25S Wiring Diagram
Term Description
annunciator A Liquid Crystal Display (LCD) label that is displayed to identify a particular
baud Unit of data transmission signalling speed, roughly analogous to bits per second
display durationThe programmed number of seconds that a quantity is displayed on the LCD before
it is replaced with the next quantity in the display sequence
EEPROM Electrically Erasable Programmable Read Only Memory. A memory chip that can
only be erased by an electrical signal (retains data during a power outage)
EPROM Erasable Programmable Read Only Memory. Similar to EEPROM except it requires
electronic detentAn algorithm in firmware which restricts the device to metering energy flow only to
firmware Computer programs stored in non-volatile memory chips (ROMs, PROMs, EPROMs,
fixed decimalA display format that always retains the same number of digits to the right of the
floating decimalA display format that allows a maximum number of digits to the right of the
decimal, but can display any number of digits to the right of the decimal equal to or
LCD Liquid Crystal Display
magnetic reed switchA mechanical switch consisting of a thin metal contact which is closed by an
nonvolatile memorySee EEPROM
RS-232 A communication media whereby information is transmitted through a serial bit
GLOSSARY
G-2CENTRON Meter Technical Reference Guide
A
AEP barcode7-2
alternate display mode5-3
Alternate Mode Magnetic Reed Switch8-6
annunciator2-2, 5-5, 8-2–8-3, G-1
disk emulator8-4
kWh5-5
test mode5-5
RF6-2, 7-2
ASIC3-2–3-3
B
AEP7-2
base1-2
battery1-5, 5-22
self-discharge rate5-22
billing quantities5-7
blank display8-8, 8-10
block interval5-20
BPSK7-2
test mode2-2, 5-4
calendar schedule5-15
CellNet RF technology
CellNet Shooter7-4
circuit board2-4
register module2-1
Clock error8-6
clock register3-3, 4-1
optical port5-1
communications rate
comparator8-3
board-to-board2-4, 2-6–2-7, 4-2
controls and indicators5-2
power removal6-4
cover2-2, 5-24
inner2-7
CRC7-1
cumulative demand5-21
current season register5-8, 5-16
Cyclic Redundancy Checks (CRC)7-1
D
Daylight Savings Time (DST)5-16
demand module5-4
demand reset2-7, 5-14, 8-9
demand reset button5-2, 5-24
detent register4-2
display
display item5-6
DST5-16
EEPROM5-17, 5-22, G-1
Index
I-2CENTRON Meter Technical Reference Guide
electronic load indicator5-5, 6-2
energy calculation5-20
energy register5-7
EOI annunciator5-5
error
metrology8-7
error code8-5
Full Scale Overflow8-7
Low Battery1-5, 5-23, 8-6
TOU8-6
ESD damage2-3
expansion port5-19
fatal errors8-1, 8-5
field testing8-1, 8-4
fixed decimalG-1
forward energy flow4-2, 5-2, 6-3
Full Scale Overflow error8-7
general meter troubleshooting8-8
H
principle3-1
holiday schedule5-15
I/O module1-5
infrared LED4-5, 8-4
inner cover2-7
removing2-3
inspection2-1
inversion counter6-4
IR light pipe2-7
ITPR5-25, 6-4
kWh annunciator5-5
L
LAN Address ID7-1
LCDG-1
configuration4-5
LCD holder2-6
LCD module4-2
LEDG-1
line frequency2-2
See also LCD
disposal2-1
load profile5-22
Load Profile error8-6
Load Profile register5-18
low power mode5-23
magnetic reed switch5-4, 5-24, 8-6, 8-9
mass memory5-17–5-18
metal oxide varistor1-3
resetting4-4
meter base1-2–1-4, 2-2, 2-6, 6-1
meter inversion6-4
CENTRON Meter Technical Reference GuideI-3
metrology base1-2, 5-1
metrology circuit board1-3
metrology watt loss1-7
clock4-1, 4-3
demand5-4
load profile5-1, 5-4
register2-4, 2-6, 5-22
module holder1-4
N
non-volatile memory5-1, 5-3, 5-8, 6-1
normal display mode5-2
operating temperature range2-2, 4-5, 6-2
optical connector2-2, 2-7
optical port5-1, 5-14
outer cover1-5
P
personality module1-2–1-5, 2-2–2-3, 2-6, 5-5, 5-26, 8-8
C1SD5-1, 5-19
C1SR6-1–6-2
expansion port5-19
load profile5-22
TOU5-22
power removal counter6-4
previous demand5-21
PRO-READ1-1
SCS5-1, 5-25
pulse weight calculation5-17
R300 module6-1
random silent time6-3
ReadOne Pro handheld reader6-4
current season5-16
Load Profile5-18
register watt loss1-7
removal tamper counter6-4
resetting meter4-4
C1SR6-5
reverse current flow6-4
reverse energy flow4-2, 5-2, 6-3
reverse power flow6-4
rolling demand5-14, 5-21
RS-232G-1
RTPR5-25, 6-4
schedule
daily5-15
rate5-15
SCS protocol5-1, 5-25
seasonal schedule5-15
security code
secondary5-19
segment test2-2
self-read5-1, 5-8, 5-14
I-4CENTRON Meter Technical Reference Guide
Standard Consumption Messages (SCMs)5-25
meter2-1
switch
demand reset5-14
T
tamper detection6-4
tertiary security code5-19
test codes
test display mode5-3
test mode8-3
test mode button2-2, 5-4, 5-24
testing
field8-1, 8-4
TOU schedule8-1
time blocks5-15
Time-of-Use5-15
Time-of-Use (TOU)5-25
TOU annunciator8-2
TOU module5-4
TOU schedule testing8-1
transformer rated meter6-2
transmission cycle6-3
blank display8-8, 8-10
demand reset8-9
magnetic reed switch8-9
reset mechanism8-9
time/date wrong8-8
unpacking2-2
V
W
watt disk emulator5-5, 6-2, 7-3
watthour8-2
watthour measurement8-1
ZRO-C24-4