Read high ohm & Insulation resistance accurately on any DMM from 100kW to 2 GW. Simply connect up, set the meter to read volts and read as GW, (1volt = 1GW.) use the millivolt range for lower values. The unique circuit design provides a steady reading of all high resistance readings. Applications include PCB and capacitor leakage, coil, transformer and cable insulation, finding earth leakage faults on equipment etc.