... 2).Optical isolated USB Interface PROVA-6830A Series Power and Harmonics Analyzer (100A;1000A;3000A) Analysis for ... 3P4W, 3P3W, 1P2W, 1P3W True RMS Value (V 123 and L 123 ) Active Power (W, KW, ... Please refer to users manual for more detailed and up-to-date description of specification Range Resolution ... Current( 50 or 60Hz, Auto Range,True RMS,Crest Factor<4,CT=1)Range Resolution Accuracy ...