Electrical – Atmel M90E26 energy meter

energypower-meter

Datasheet

Application Note

I'm working with the atmel m90e26 IC. Its energy is numerically pulse_based, but I do not know what the relationship between energy and pulse is in this IC. There's a parameter named MC=3200 imp/kWh in the application note I attached it with the datasheet. Maybe this parameter is related to my problem.

What the relationship between energy and pulse is in this IC?

Best Answer

Once you make an energy meter, it won't directly give you the accurate reading of 3200 impulses per kWh. You need to calibrate each energy meter circuits individually against a standard meter.

For your chip (M90E26), it requires writing to some calibration registers. Check section 3 of your document.

If this calibration process looks too complicated to you, you can go for simpler chips where calibration requires shorting of binary ladder resistors on the voltage sampling channel. Example of such an IC - BL0921.