Introduction UT500 series insulation testers are used to measure the insulation resistance of electrical equipment and household appliances. This is done by measuring the insulation resistance between electrical circuits or between circuits and ground. UT500 series can measure insulation resistance, AC voltage, low resistance, PI (Polarization Index) and DAR (Dielectric Absorption Ratio). These are ideal tools for ensuring transformers, generators, high voltage motors, power capacitors, power cables, arresters and other electrical equipment that can operate in a safe and accurate manner. Specification Model: UT501A Insulation Resistance (Ω) Test Voltage: 100V/250V/500V/1000V 0%~10% 100V: 0.00MΩ~100MΩ ±(3%+5) 250V: 0.00MΩ~99.9MΩ ±(3%+5) / 100MΩ~5.0GΩ±(5%+5) 500V: 0.00MΩ~99.9MΩ ±(3%+5) / 100MΩ~5.0GΩ±(5%+5) 1000V: 0.00MΩ~99.9MΩ ±(3%+5) / 100MΩ~5.0GΩ±(5%+5) Load Current 50V (R=50kΩ) 1mA: 0%~10% 100V (R=100kΩ) 1mA: 0%~10% 250V (R=250kΩ) 1mA: 0%~10% 500V (R=500kΩ) 1mA: 0%~10% 1000V (R=1MΩ) 1mA: 0%~10% Short Circuit Current: <2mA AC Voltage (V): 30V~750V ±(2%+3) Features Display Count: 2000 Auto Range: √ Low Battery Indication: √ LCD Backlight: √ Alarm Light Display: √ Alarm Buzzer: √ High Voltage Indication: √ Over Load Indication: √ Auto Disharge: √ Test Voltage Vice Display: √ 10MΩ Internal Resistance Test: √ General Characteristics Power: 1.5V Batteries (LR6) × 6 LCD Size: 70.6mm x 34mm Product Color: Red and Grey Product Net Weight: 500g Product Size: 150mm x 100mm x 71mm Standard Accessories Batteries, Probe, Alligator Clip, Test Lead, Gallus, Gift Box, English Manual