UT500 series Digital Megger Meter or 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 the ground. UT500 series can measure insulation resistance, AC Voltage, low resistance, PI (Polarization Index), and DAR (Dielectric Absorption). These are ideal tools for ensuring transformers, generators, high-voltage motors, capacitors, cables, arresters, and other electrical equipment can operate safely and accurately.
Models in UT500 series: UT501A, UT501B, UT502A
Uni-T Brand Digital Megger Meter Insulation Tester, Model: UT501A
- Certifications: CE, UKCA
- 2000-count LCD, overload indication, backlight
- AC voltage measurement, auto power off
- Auto discharge
- Continuous low resistance measurement
- Continuous measurements mode, red warning light, and buzzer function
- PI and DAR measurement, auto resistivity calculation
- Low resistance returning to zero function to improve accuracy
Specifications of UT501A Insulation Resistance Testers
| Specifications | Range | UT501A | UT501B | UT502A | |
| Insulation resistance (Ω) | Test voltages | 100V/250V/500V/1000V | 0%~10% | ||
| 250V/500V/1000V | 0%~10% | ||||
| 500V/1000V/2500V | 0%~10% | ||||
| 100V | 0MΩ~100MΩ | ±(3%+5) | |||
| 250V | 0MΩ~99.9MΩ | ±(3%+5) | ±(3%+5) | ||
| 100MΩ~5GΩ | ±(5%+5) | ±(5%+5) | |||
| 500V | 0MΩ~99.9MΩ | ±(3%+5) | ±(3%+5) | ±(3%+5) | |
| 100MΩ~5GΩ | ±(5%+5) | ±(5%+5) | ±(5%+5) | ||
| 1000V | 0MΩ~99.9MΩ | ±(3%+5) | ±(3%+5) | ±(3%+5) | |
| 100MΩ~5GΩ | ±(5%+5) | ±(5%+5) | ±(5%+5) | ||
| 2500V | 0MΩ~99.9MΩ | ±(3%+5) | |||
| 100MΩ~9.9GΩ | ±(5%+5) | ||||
| 10GΩ~20GΩ | ±(10%+5) | ||||
| Load current | 50V (R=50kΩ) 1mA | 0%~10% | 0%~10% | 0%~10% | |
| 100V (R=100kΩ) 1mA | 0%~10% | 0%~10% | 0%~10% | ||
| 250V (R=250kΩ) 1mA | 0%~10% | 0%~10% | 0%~10% | ||
| 500V (R=500kΩ) 1mA | 0%~10% | 0%~10% | 0%~10% | ||
| 1000V (R=1MΩ) 1mA | 0%~10% | 0%~10% | 0%~10% | ||
| 2500V (R=1MΩ) 1mA | 0%~10% | ||||
| Short-circuit current | <2mA | <2mA | <2mA | ||
| Low resistance (Ω) | 0.01Ω~200Ω (about 5.0V/>200mA） | ±(2%+3) | ±(2%+3) | ||
| AC voltage (V) | 30V~750V | ±(2%+3) | |||
| 30V~600V | ±(2%+3) | ±(2%+3) | |||
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