Insulation resistance tester UNI-T UT512 SPECIFICATION: Insulation Resistance: 0.5MOhm ~100GOhm - best accuracy: +/- (3%+5) Testing Voltage: 500V / 1000V / 1500V / 2500V - best accuracy: 0 ~ 20% DC Voltage: 600V - best accuracy: +/- (2%+5) AC Voltage: 600V - best accuracy: +/- (2%+5)