The UNI-T UT511 is a digital insulation resistance tester with selectable 100 V, 250 V, 500 V and 1000 V test voltages. It supports insulation resistance, PI, DAR, low-resistance and AC/DC voltage measurement for maintaining motors, cables, transformers and other electrical equipment.
Key Features
- Selectable 100 V, 250 V, 500 V and 1000 V insulation test voltages
- Measures insulation resistance up to 10 GΩ and low resistance down to 0.1 Ω
- Automatic Polarisation Index (PI) and Dielectric Absorption Ratio (DAR) measurement
- 9999-count backlit display with a 30-segment analogue bar graph
- Comparison testing, 18-group data storage, automatic discharge and high-voltage warning
Product Specifications
| Parameter |
Range / Specification |
Basic Accuracy |
| Insulation Test Voltages |
100 V / 250 V / 500 V / 1000 V |
0% to +10% |
| Insulation Resistance at 100 V |
0.1 MΩ to 500 MΩ |
±(3% + 5) |
| Insulation Resistance at 250 V |
0.5 MΩ to 2 GΩ |
±(3% + 5) |
| Insulation Resistance at 500 V |
1 MΩ to 4 GΩ |
±(3% + 5) |
| Insulation Resistance at 1000 V |
2 MΩ to 10 GΩ |
±(3% + 5) |
| DC Voltage |
Up to 1000 V |
±(2% + 3) |
| AC Voltage |
Up to 750 V |
±(2% + 3) |
| Low Resistance |
0.1 Ω to 999.9 Ω |
±(1% + 3) |
| Short-Circuit Current |
<2 mA |
| Display |
9999 counts with 30-segment analogue bar graph |
| Ranging Mode |
Automatic ranging |
| Insulation Analysis |
Polarisation Index (PI) and Dielectric Absorption Ratio (DAR) |
| Data Storage |
18 groups |
| Timed Measurement |
Up to approximately 30 minutes |
| Additional Functions |
Comparison testing, continuous measurement, automatic discharge, automatic power-off, backlight, low-battery indication, over-range warning and high-voltage indication |
| Safety Rating |
CAT III 600 V / CAT II 1000 V |
| Certifications |
CE, UKCA |
| Power Supply |
8 × 1.5 V LR14 batteries |
| Optional Power Supply |
Compatible power adaptor |
| LCD Dimensions |
123 × 58 mm |
| Product Dimensions |
202 × 155 × 94 mm |
| Product Weight |
Approximately 1.2 kg |
Applications
- Insulation testing of motors, generators and transformers
- Power cable, distribution circuit and switchgear maintenance
- Preventive electrical maintenance and insulation condition assessment
- Testing of instrument transformers, surge arresters and other electrical equipment
Included Components
- UNI-T UT511 insulation resistance tester
- 2 × single-plug test leads with alligator clips, black and green
- 1 × dual-plug test lead with alligator clip, red
- Carrying case
- User manual and warranty documentation