UT501C Insulation Resistance Tester Portable Electronic Insulation Meter Digital Circuit Leakage Detector Item Type: Insulation Resistance Meter Model: UT501C Battery: 6 x 1.5V AA (Battery Not Included) Material: ABS Application: Suitable for insulation measurement in cable factories, substations, power stations, motor windings Test Range: 30V~750V (50Hz/60Hz) Resolution: 1V Accuracy: ±(2%+3) Insulation Resistance Test Index: Rated Voltage 250V 500V 1000V 2500V Test Range 0.00MΩ~100MΩ 0.00MΩ~500MΩ 0.00MΩ~2.00GΩ 0.00MΩ~5.00GΩ Open Circuit Voltage DC 100V+10% DC 250V+10% DC 500V+10% DC 1000V+10% Rated Test Current 1.0mA~1.1mA at 100kΩ load 1.0mA~1.1mA at 250kΩ load 1.0mA~1.1mA at 500kΩ load 1.0mA~1.1mA at 1MΩ load Short Circuit Current Less than 2.0mA Accuracy Range 0.00MΩ~99.9MΩ: ±(3%+5) 100MΩ~9.99GΩ: (5%+5) 100MΩ~5.00GΩ: ±(10%+5)