Measure input parameters: Vrms, lrms, W, PF, Hz, current crest factor, total harmonic and 0~50th harmonic components. V range: 10.0~300.0V, A range: 0.010~2.000A,f range: 45~65Hz • Measure output parameters: Vrms, lrms, W, PF, Hz, current crest factor, total harmonic and 0~50th harmonic components Lamp voltage range: 10.0~450.0V, Lamp current range: 0.010~2.000A • Accuracy: ±(0.4% reading+0.1% range+1 digit) • Can test every kind of curve, print both data & curve • Communication interface available for PC, running under