... constants of watt-hour meter; 2, Real-time field measurement three-phase voltage, current, active power, reactive power, phase, power ... barcode scanners to be automatic scanning electric energy meter, the table; 10, With intelligent photoelectric sampler, convenient to the pulse to ... resolutionAccuracy1Accuracy2voltage 6~600V0.001V0.02%0.05%Current CT 0.002~20A0.002A0.02%0.05%Current (clamp) 0.01~ ...