Feature: 1. PI MEASUREMENT AND AGING IDENTIFICATION: The power system requires insulation resistance tester to measure the polarization index in the insulation test of the main transformer, cable, motor, etc., to judge the quality of the insulation condition, quality and aging problems 2. AUTOMATIC COMPARISON: The ground resistance tester can automatically calculate the DAR absorption ratio of the DAR measurement, the ratio of the insulation resistance value at 1 minute to the insulation resistance value at 30 seconds, and determine whether the equipment affect the insulation resistance due to humidity 3. ACCURATE AND POWERFUL: High accuracy megrohm meter, insulation resistance tester can be used for AC and DC voltage measurement, insulation resistance measurement, support 1100 sets of data storage, automatic calculation of polarization index and absorption ratio 4. WITH BACKLIGHT AND SUPPORT FRAME: The digital display back light screen allow you to see the screen value in dim environment, the back has 45° extendable support frame, so that the megohm meter is convenient to stand operation 5. MULTI LEVEL HIGH VOLTAGE OUTPUT: Connect the insulation resistance measuring pen to both ends of the test appliance, select the output voltage, press the TEST button will automatically discharge to measure whether the appliance is normal or short circuit Specification: Item Type: Insulation Resistance Tester Model: HT5203 Material: ABS, silicone Battery: 8 x 1.5V AA battery(not include) Basic Parameters: DC Voltage Measurement: Range: 1000V Resolution: 1V Accuracy: ±(1.0% reading and 5 words) AC Voltage Measurement: Range: 750V Resolution: 1V Accuracy: ±(1.0% reading and 5 words) Frequency Range: 40~400Hz(sine wave) Continuity Measurement: Measuring Range: 200.0Ω Resolution: 0.1Ω Accuracy: ±(1.0% reading and 5 words) Resistance: < about 50Ω, buzzer sound Insulation Resistance Measurement: Test voltage Measuring range Resolution Accuracy 50V 0~20.00MΩ 0.01MΩ ±(3% reading and 5 words) 20.0~200.0MΩ 0.1MΩ 100V 0~20.00MΩ 0.01MΩ ±(3% reading and 5 words) 20.0~200.0MΩ 0.1MΩ 0.200~1.000GΩ 0.001GΩ 250V 0~20.00MΩ 0.01MΩ ±(3% reading and 5 words) 20.0~200.0MΩ 0.1MΩ 0.200~2.000GΩ 0.001GΩ 500V 0~20.00MΩ 0.01MΩ ±(3% reading and 5 words) 20.0~200.0MΩ 0.1MΩ 0.200~2.000GΩ 0.001GΩ 2.00~20.00GΩ 0.01GΩ 1000V 0~20.00MΩ 0.01MΩ ±(3% reading and 5 words) 20.0~200.0MΩ 0.1MΩ 0.200~2.000GΩ 0.001GΩ 2.00~20.00GΩ 0.01GΩ 20.0~100.0GΩ 0.1GΩ ±(5% reading and 5 words) . Package List: 1 x Tester2 x Tester Pen2 x Crocodile Clip1 x User Manual1 x Storage Bag