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Description
The Uni-T UT501B is a high-precision 1000V insulation resistance tester, engineered for professional electrical maintenance and safety inspections. This advanced Megohmmeter is designed to measure insulation resistance across a variety of materials and critical electrical equipment, including transformers, motors, cables, and switches. By accurately measuring the resistance between electrical circuits or between circuits and ground, it ensures your systems remain operational and safe.
What sets the UT501B apart is its ability to perform advanced diagnostic calculations. It features Polarization Index (PI) and Dielectric Absorption Ratio (DAR) measurement capabilities, which automatically calculate the resistivity over time. These functions are essential for determining the long-term health of insulation in high-voltage motors and power capacitors, providing data that a simple resistance test cannot offer.
Why It Matters
Faulty insulation is a leading cause of electrical failure and safety hazards. The UT501B provides technicians with a reliable tool to detect insulation degradation before it leads to short circuits or equipment damage. With its built-in AC voltage measurement and low-resistance testing, it serves as a versatile diagnostic hub for ensuring transformers, generators, and arresters operate in a safe and accurate manner.
What's Included
- ✓ 1 x UT501B Insulation Resistance Tester
- ✓ 1 x Set of Test Leads
- ✓ 1 x Set of Alligator Clips
- ✓ 1 x Carrying Case
- ✓ 1 x Gallus (Shoulder Strap)
- ✓ 6 x 1.5V Batteries
- ✓ 1 x English User Manual
- ✓ 12-Month Warranty
Features & Benefits
- Advanced Diagnostics: Built-in PI and DAR measurement with auto resistivity calculation.
- Selectable Test Voltages: Supports 250V, 500V, and 1000V testing ranges.
- Safety First: Features auto-discharge, high voltage indication, and an alarm buzzer for safer operation.
- Clear Visibility: 2000 count LCD display with backlight for use in low-light environments.
- Low Resistance Testing: Capable of measuring low resistance from 0.01Ω to 200Ω.
- Durable Design: Meets IEC 61557 standards for electrical safety in low voltage distribution systems.
Applications
- Preventative maintenance for industrial electric machines.
- Inspection of high-voltage power cables and transformers.
- Safety auditing of household electrical appliances.
- Testing of power capacitors and arresters.
Technical Specifications
| Feature | Range / Specification |
|---|---|
| Test Voltages | 250V / 500V / 1000V |
| Insulation Resistance | 0MΩ to 5GΩ |
| Low Resistance | 0.01Ω to 200Ω |
| AC Voltage | 30V to 600V |
| Display Count | 2000 |
| Internal Resistance | 10MΩ |
Tradie Pro Tip: When testing large motors or long cable runs, utilize the PI (Polarization Index) function. A PI value below 2.0 often indicates that the insulation may be contaminated with moisture or dirt, even if a standard spot-reading seems acceptable.
Pair With
- Digital Multimeters
- Clamp Meters
- Electrical Insulating Gloves
Keep your workspace safe and your equipment running efficiently with the Uni-T UT501B. Shop now at HVAC Shop for reliable electrical testing solutions!
Common Questions for Uni-T UT501B 1000V Insulation Resistance Tester DAR PI Functions
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