Overview High voltage insulation megohmmeter is composed of medium and large scale integrated circuits. This meter has large output power high short-circuit current value and large output voltage grades (there are four voltage grades). The working principle is as follows: the DC high voltage generated by the battery inside the machine as power supply and converted by DC/DC reaches the L pole from the E pole by the tested product so as to generate a current from E to L pole. After I/V conversion and operation by the divider the measured insulation resistance value is directly displayed by LCD. Technical Parameters Working Conditions environment temperature relative humidity 85%RH output voltage level 500V 1000V 2000V2500V measurement range 019990M Resolution 0.01M0.1M1.0M10.0M relative error Voltage/load 2500V/20M Voltage drop about10% short-circuit current 1.6mA direct current 81.5V(AAR6)battery alternating current 220V/50Hz Power quiescent dissipation