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2500V Resistance Insulation Tester
2500V switches between 250V, 500V, 1000V,2000V, 2500V
High voltage indication
There is a red LED light in the machine indicating that there is high voltage output of the instrument; there is a danger of electric shock, the operator should pay special attention to safety.
Low battery voltage indicationE1: Battery-driven, easier to use.
2000 digits with bar graph display, easy to read the data. Measuring range:
2500V: load capacity, <1.8mA output short-circuit current.
Complete protection circuit, not afraid of voltage counterattack, output short circuit protection.
It can measure AC/DC voltage 10V~600V, AC voltage frequency 40Hz ~70Hz. Dust-proof and moisture-proof structure, suitable for outdoor operation.
Dimensions: 180X140X70 (mm)
Weight: about 800g (including battery)
Working conditions: 0°C~35°C, relative humidity 75% or less, 2000 meters above sea level
Output voltage: ±10% (output load >= 1000MΩ)
Short circuit current: about less than 1.8mA;
Low battery indication: Display shows insulation resistance: >=500MΩ (1000V);
Withstand voltage: AC 2KV 50Hz 1 minute;
Working temperature and humidity: working temperature 0°C~40°C, relative humidity 85% or less;
Table 1. 1000V technical parameters Output voltageRangeAccuracyShort-circuit current250V2MΩ~20GΩ± (5%+10)Less than (5%+10)Less than 1.8mA2000V3MΩ~20GΩ± (5%+10)Less than 1.8mA2500V5MΩ~20GΩ± (5%+10)Less than 1.8mAAC Voltage10~600V± (1%+5)Less than 1.8mADC Voltage10~600V± (0.8%+5)Less than 1.8mA
Special Features:
A. Absorption ratio DAR measurement
When the insulation resistance measurement time is greater than 1 minute, the measurement is ended. Press the "DARP!" key on the instrument panel and the device will display the "DAR" symbol. The instrument will automatically calculate the absorption ratio and display it in the lower left corner of the display. The ratio of the insulation resistance value at 1 minute to the insulation resistance value at 30 seconds.
B. polarization Index PI Measurement
After the insulation resistance measurement time is greater than 10 minutes, the measure menu is ended. Press the "DARP!" key on the instrument panel until the display shows the "PI" symbol. The instrument will automatically calculate the polarization index value and display it in the lower left corner of the display. "Polarization" The index PI's is the ratio of the insulation resistance value at 10 minutes to the insulation resistance value at 1 minute.
Insulating materials all have the absorption process and polarization process of charge after adding high voltage. The power system requires that the polarization index should be measured by the insulation test of the main transformer, cable, motor, etc., and this data can be used to judge the quality of insulation, quality and aging problems.

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