The 380395 is a digital high voltage insulation tester designed for comprehensive electrical safety testing and insulation diagnostics. It features selectable test voltages of 500V, 1000V, 2500V, and 5000V with insulation resistance measurement capabilities ranging from 0 to 60GO across five ranges, delivering ±2.5% accuracy. The instrument includes a 6000-count display with bargraph and backlight, polarization index (PI) and dielectric absorption ratio (DAR) measurements, AC/DC voltage measurement from 0 to 600V (±1% accuracy), resistance measurement to 600O (±1.5% accuracy), and a 1 to 15 minute timer function for timed IR measurements. Additional features include autoranging, auto-discharge function, voltage output warning, and auto power-off with battery check. This tester is ideal for maintenance technicians, electrical contractors, and field service personnel performing insulation testing on motors, transformers, cables, and other high-voltage equipment in industrial and commercial applications.