... 1ms Rated AC voltage, current @50Hz, 25°C: 0.2% Rated AC voltage, current @45 ... recording testData record format: Same as digital fault recorder and analysis systemData transfer format: IEC60255-24 ... IPBack software: Full and convenient functions, Perfect functions in waveform display, edition, alternation, combination, comparing, ... ), 16 channel per group, with power supply or none.According to customer