Power and Harmonics Analyzer PROVA-6830A Series 1).Clamp Meter:100A,1000A,3000A ... for option 2).Optical isolated USB Interface PROVA-6830A Series Power and Harmonics Analyzer (100A;1000A;3000A) ... PF), Phase Angle (Φ) Energy (WH, KWH, KVARH, PFH) Current Measurement from 0.1mA to 3000A, Capable of Analyzing IT ... % ± 8 dgts±1% of VA Range ±8dgtsAC Current( 50 or 60Hz, Auto Range,True RMS,Crest Factor ...