Accuracy: class 0.1 Advanced power source technology, and operation software Test 3~60 ... deviation testInput power supply:220va±10%,50hz, ma. Power consumption:1,500vaOn-line calibration can be conducted on 1p2w single-loop ... 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 Meter Test ...