Accuracy: class 0.1 Advanced power source technology, and operation software ... , ma. Power consumption:1,500vaOn-line calibration can be conducted on 1p2w single-loop watthour meter and also ... off-line calibration on the three kind of loops such as 1-2, 4-3, 1 ... -2-4-3 (or 1-4,3-2,1-4-3-2) ... can be performed 1-PH KWH ...