We are making some tests with ADE7880 evalboard, specially on calibration procedures. We have done all procedures described on appnote AN-1171, considering the basic values of 220V and 10A. The error result at calibration point is OK (<0,1%). After the calibration , we are changing the voltage input value (for example, from 220 to 120V), and we are seeing that error variation is too big (around 0,5%).
Is there any dependency on calibration and input voltage value?