ENERGY METER Accuracy class: 0.05/0.1class Frequency range: ... or 0.1% (PF 0.5-1) The energy meter field-testing instrument is made by using the newest international digital electron ... value of 3 phase parameters as voltage, current, frequency, energy, power factor and etc. In the field, it can ... and power meter. The results can be saved for a long term. The user can print out the testing report, and ...