UNI-T UT501A insulation resistance tester
The UNI-T UT501A Insulation Resistance Tester is a versatile device designed for accurate insulation resistance measurement in electrical equipment and households. It can measure insulation between electrical circuits or between a circuit and earth. The UT501A offers measurements of insulation resistance, alternating voltage, low resistance, as well as PI (polarization index) and DAR (dielectric absorption coefficient). Equipped with a 2,000-digit LCD display, backlight function, overload indication and automatic shutdown, the UT501A ensures safety, accuracy and ease of operation. In addition, CE and UKCA certifications confirm the high quality of the device and compliance with European standards.
Advanced measurement functions for demanding users
The UT501A tester not only provides standard measurements, but also offers a continuous low-value resistance measurement function, an automatic discharge function and a continuous measurement function supported by audible signals and a red warning light. The PI and DAR functions, together with the automatic calculation of the specific resistance, allow for a detailed assessment of the insulation condition of high-voltage equipment such as transformers, generators, motors, capacitors or cables. In addition, the low-resistance zero function increases the accuracy of the measurements, making the UT501A an invaluable tool for diagnosing and maintaining electrical installations.
Durable design and convenient use
The UT501A’s compact and robust housing ensures that it can withstand heavy use in the field and in industrial facilities. The LCD display with backlight function allows reading of results even in difficult lighting conditions, while the auto power off function extends battery life. With the ability to perform continuous measurements and an intuitive warning system, you gain full control of the test process, allowing you to quickly and safely assess the status of your installation. The UNI-T UT501A is an indispensable partner where reliability and accuracy count.
Included
- insulation resistance tester
- batteries
- test leads
- crocodiles
- instruction manual
Specifications:
| Manufacturer | UNI-T |
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| Model | UT501A |
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| Number of displayed digits | 2000 |
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| DAR measurement | Supported (60 s / 15 s and 60 s / 30 s) |
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| PI measurement | Supported |
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| Automatic range selection / low battery indication | Supported |
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| LCD backlight / alarm light | Built-in |
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| Audible alarm/high voltage indicator | Built-in |
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| Overload/self-discharge indication | Built-in |
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| Secondary test voltage display | Built-in |
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| Internal resistance test 10 MΩ | Supported |
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| Paid standards | IEC 61557 (61557-1:2007, 61557-2:2007, 61557-4:2007 - UT502A only) |
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| Catering | 6 × 1.5V battery (LR6) |
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| Screen | 70.6 × 34 mm |
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| Product color | Red, gray |
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| Weight | 500g |
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| Dimensions | 150 × 100 × 71mm |
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Measurement range
| Test voltages | 100 V / 250 V / 500 V / 1000 V- 250 V / 500 V / 1000 V- 500 V / 1000 V / 2500 V |
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| Insulation resistance measurement (Ω) | 100 V: 0 MΩ ~ 100 MΩ (accuracy ±(3%+5))- 250 V: 0 MΩ ~ 99.9 MΩ (±(3%+5)), 100 MΩ ~ 5 GΩ (±(5%+5))- 500 V: 0 MΩ ~ 99.9 MΩ (±(3%+5)), 100 MΩ ~ 5 GΩ (±(5%+5)). 1000 V: 0 MΩ ~ 99.9 MΩ (±(3%+5)), 100 MΩ ~ 5 GΩ (±(5%+5)). 2500 V: 0 MΩ ~ 99.9 MΩ, 100 MΩ ~ 9.9 GΩ, 10 GΩ ~ 20 GΩ. |
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| Load current | 50 V (50 kΩ) 1 mA (0% ~ 10%), 100 V (100 kΩ) 1 mA (0% ~ 10%), 250 V (250 kΩ) 1 mA (0% ~ 10%), 500 V (500 kΩ) 1 mA (0% ~ 10%), 1000 V (1 MΩ) 1 mA (0% ~ 10%), 2500 V (1 MΩ) 1 mA (0% ~ 10%). |
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| Short circuit current | <2mA |
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| Low resistance measurement (Ω) | 0.01 Ω ~ 200 Ω (about 5.0 V, over 200 mA) |
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| AC voltage measurement (V) | 30 V ~ 750 V (±(2%+3))- 30 V ~ 600 V |
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