Centron Electric Meter

Posted on  by admin
I will tell you what those three dots that replaced your old fashionedspinning wheel means. 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).