This meter is an insulation resistance tester with broad range of measurement which can be applied to various situations from low-voltage to high-voltage measurements. For example, measuring the insulation of high-voltage receiving station and transformer substation, as well as the electric motor and cable. ● Broad Range of Testing Voltage: -Testing voltages with broad range can be generated (from 250 V to 5 KV). -Testing voltage can be preset as 250 V, 500 V, 1 KV, 2.5 KV, or 5 KV, or as a voltage increasing or decreasing in steps of 25 V or 100 V. ● Insulation Diagnosis: -PI and DAR can be automatically calculated and displayed; -Step-voltage measurements and temperature compensation is carried out. ● Large Storage Memory: -Up to 100 manually tested data and 10 groups of log-test data can be saved. -Test data can be read on LCD, or uploaded to PC ● Clear Display: -Large-screen display. Test result is displayed with indication through a graduation bar. -LCD screen is backlit, which is suitable for viewing when it is dark. ● PC Communication: -The meter is equipped with a USB interface, through which the saved test data can be uploaded to a PC for further table/figure making and report generating with convenience. ● Robust and Durable: -With a compact structure, the tester is robust, durable and portable. ● Powered by Batteries: -With a selection switch, the tester can be powered by an alkaline battery. -This tester can be continuously operated for a longer period of time than similar meters if a LR14 alkaline battery is used. Specifications Operating Voltage Measuring Range Accuracy 250V DC 0.01MΩ~2.5GΩ ±(5%+5) 2.51GΩ~250GΩ ±(20%+10) 500V DC 0.01MΩ~5.0GΩ ±(5%+5) 5.01GΩ~500GΩ ±(20%+10) 1000V DC 0.01MΩ~10GΩ ±(5%+5) 10.01GΩ~500GΩ ±(20%+10) 501GΩ~999GΩ ±(30%+20) 2.5KV DC 0.01MΩ~25GΩ ±(5%+5) 25.1GΩ~500GΩ ±(20%+10) 501GΩ~999GΩ ±(30%+20) 1TΩ~2.5TΩ ±(30%+40) 5KV DC 0.01MΩ~50GΩ ±(5%+5) 50.1GΩ~500GΩ ±(20%+10) 501GΩ~999GΩ ±(30%+20) 1TΩ~5TΩ ±(30%+40) Leakage Current Range Measuring Range Accuracy 10nA 1.00nA~9.99nA ±(15%+1nA) 100nA 9.0nA~99.9nA ±(15%+5) 1000nA 100nA~999nA ±(2.5%+5) 10μA 0.90μA~9.99μA 100μA 9.0μA~99.9μA 1000μA 90μA~999μA 3mA 0.90mA~3.00mA Resistance Range of insulation Range of humidity Range of temperature 0Ω~100MΩ <85% RH 23℃ ±5℃ 73℉ ±9℉ 101Ω~20GΩ <75% RH 21GΩ~500GΩ <65% RH 501GΩ~5TΩ <55% RH Voltage Test Mode DC Voltage AC Voltage Test Range ±(50V~1000V) ±50V~750V (50Hz~60Hz) Precision error ±(5%+5) ±(5%+5) Input Resistance Approx. 10MΩ Approx. 10MΩ Temperature Measuring Range Measuring Precision -10℃~0℃ ±1.5℃ 0℃~40℃ ±2.0℃ 40℃~70℃ ±1.5℃