UNI T Insulation Resistance Tester UT501A is used to measure the insulation resistance of electrical equipment and household appliances. This UT-501A earth insulation resistance meter is done by measuring the insulation resistance between electrical circuits or between circuits and the ground. This megohmmeter voltmeter can measure insulation resistance, AC Voltage, low resistance, PI (Polarization Index), and DAR (Dielectric Absorption). This insulation megger 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. Features: Measure insulation resistance across a wide range Test voltages of 100V, 250V, 500V, and 1000V Large size LCD screen with backlight (can be switched on/off) 2000 count display Simple-to-use Large test initiate button Ports for test leads Data hold function Various indicators available on the device Specifications: 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~5.5GΩ ±(5%+5) 500V : 0.00MΩ~99.9MΩ ±(3%+5); 100MΩ~5.5GΩ ±(5%+5) 1000V : 0.00MΩ~99.9MΩ ±(3%+5); 100MΩ~5.5GΩ ±(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) Display Count: 2000 Automatic measurement: Yes Low Battery Indication: Yes LCD Backlight: Yes Alarm Light Display: Yes Alarm Buzzer: Yes High Voltage Indication: Yes Over Load Indication: Yes Auto Discharge: Yes Test Voltage Vice Display: Yes 10M? Internal Resistance Test: Yes Power: 6 x 1.5V Alkaline batteries ( Not included ) LCD Size: 65mm x 27mm Product Net Weight: 500 g Product Size: 150mm x 100mm x 71mm Product Color: Red and Grey Package Size: 18.5 x 15 x 9cm / 7.3 x 5.9 x 3.7in Package Weight: 700g / 1.5lb Package Includes: 1 x Megohmmeter UNI-T UT501A 2 x Test leads 2 x Test probes 1 x Alligator clip 1 x Carrying bag 1 x Strap 1 x User manual Uses: Testing insulation of electrical wires and cables Checking motors, transformers, and generators Preventing electrical leakage and hazards Used in industrial and commercial maintenance Ideal for electricians and electrical safety inspections