... phase C);Voltage, current output a wide range, big power, high stability, waveform distortion ... output precision, harmonic distortion degree is small;Range switching automaticallyTo use software calibration, simple operation ... 100 V , 220 V , 380 V; range switch automatically Adjust fineness: 0.01% RG Accuracy: ... A , 5 A ,10 A , 20 A; range switch automaticallyAdjust fineness: 0.01% RG Accuracy: 0.05% ...