1000V Megohmmeters AEMC® manufactures a complete line of insulation testers designed to test the quality of insulation using 1000V test voltage required for testing equipment designed to be powered by 480VAC. Both analog and digital meters are available. AC powered, battery powered and hand crank models are available. Most models will measure into the GΩ and TΩ range. Most models offer multi-function capability, measuring AC/DC volts, resistance and continuity as well as insulation resistance. Both hand held instruments and rugged instruments built into portable cases are available.