... , electrical equipment, and communication equipmen HB17...SB: output voltage and current are showed by the LCD screenService occasion:Testing ... equipment, high-middle academy, apparatus, automatic control, electrical equipment, and communication equipment ... +2mV, CC≤2x10 +3mA Frequency: 50-60HZ Waveform and noise: CV≤1mVrms, CC≤5mArms Output voltage: regular, ...