Insulation Resistance Tester High Voltage Resistance Megohmmeter with Waterproof Box ETCR3500B Item Type: Insulation Resistance Tester Model: ETCR3500B Insulation Resistance Range: 0.005MΩ-10.0TΩ Short Circuit Current: 5mA Maximum Working Power Supply: 1 x 5200mAh Rechargeable Lithium Battery (built in battery) Polarization Index Test: Yes Absorption Ratio Test: Yes Capacitance Testing Range: 10nF-25uF: Accuracy ± 10%rdg±10nF Current Testing Range: 0.01nA-7mA; Accuracy ± 5%rdg±0.5nA Custom Setting Time: 10s-3600s Test Timer: Automatically record test time Timing Range: 0s-9999s Upload Function: Upload the stored test data to the computer through a USB comm cable. Automatic Shutdown Function: Automatically shut down after 15 minutes of power on Protection Level: IP65 Close the cover, IP40 open the cover Working Environment: -20-50℃; 80%RH Storage Environment: -25-65℃; 80%RH Insulation Resistance: 50MΩ (1000V) (between the test line and the shell) Suitable Parameter: AC 3kV 50Hz 1min (between test circuit and enclosure)