... 2005 "ammeter, voltmeter, power table and resistance meter calibration regulations, JJF1075-2001" clamp ampere ammeter calibration the requirements of the "standards ... and features 1. The device consists of a single-phase ac voltage standard resource, current standard resource and dc voltage, ... , and the results are processing and management. Technical Data AC output Voltage range 200 mV, 400 mV, 2 V, ...