Digital Insulation Resistance Tester, 250 Megohmmeter

【High Voltage Testing】This insulation tester measures insulation resistance from 0.01 MΩ to 100.0 GΩ with selectable test voltages from 250 V to 2500 V, ideal for assessing the integrity of motor windings, power cables, and transformers.
【USB Storage】The built-in USB interface allows for direct data download and measurement logging, with a memory capacity of 500 sets of results and a MEM indicator for quick access to previous field tests.
【DAR and IP】This device automatically calculates the Dielectric Absorption Ratio (DAR) and Polarization Index (PI), providing essential information for assessing the moisture and aging of high-voltage insulation systems.
【Dual Measurement】Measures DC voltage from 2.0 to 1000 V and AC voltage from 2.0 to 750 V with 0.1 V resolution, allowing for combined insulation and voltage testing on a single device during on-site maintenance. 【Robust Design】Shockproof, dustproof, and moisture-resistant ABS housing with an IP54 rating, backlit gray-white LCD screen (73 x 43 mm), and automatic shut-off after 15 minutes, designed for outdoor substations, factories, and telecommunications sites.