The Extech MG320 combines a portable insulation tester with a 20 GΩ/1000 V measuring range and a true RMS multimeter in one compact instrument. The insulation meter offers PI and DAR test modes, an adjustable timer and a comparison function to create customized test sequences and quickly evaluate results. The multimeter functions include AC/DC voltage measurement, resistance measurement and continuity testing. Up to 99 measured values can be stored manually and recalled at any time. The device has a robust housing and a large, backlit LC display with 6,000 counts and an analog bar graph.