- Input Impedance1000M Ohm. - Attenuation Ratio1000 : 1 - Accuracy: DCV (0 ~ 20kV) +/- 1%, DCV (20kV ~ 40kV) +/- 2%, ACV (0 ~ 28 kV) typically +/- 5% at 60Hz - Max. Working Voltage: 40kV DC or 28kV AC - Operating Temperature: 0 degree C ~ 50 degree C ...