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The UNI-T UT531 Insulation Resistance Multimeter combines a digital insulation tester with a full-featured, true-rms digital multimeter in a single compact, handheld unit, which provides maximum versatility for both troubleshooting and preventative maintenance.
UNI-T UT531 Insulation Resistance Multimeter is rugged, reliable, and easy to use.
Whether you work on motors, generators, cables, or switch-gear, the UNI-T UT531 Insulation Resistance Multimeter is ideally suited to help you with your maintenance tasks.
UNI-T UT531 Features:
- 6000 count Display
- Measures AC/DC Voltage & Current
- Resistance
- Capacitance
- Frequency
- Auto Ranging
- Cat III 1000V and Cat IV 600V safety rating
- Diode Test
- Continuity
- True RMS Responding
- Data Hold Function
- Data Logging: 99 readings
- Full Icon Display
- Backlit LCD Display
- Max / Min Mode
- Low Battery Display
UNI-T UT531 Insulation Multimeter Specification
| Specifications | Range | Best Accuracy | |
| Model | UT531 | ||
| Insulation Resistance(Ω) | Test Voltage | 500V/1000V | 0%～10% |
| 500V | 0.5MΩ~99.9MΩ | ±(3%+5) | |
| 100MΩ~500MΩ | ±(3%+5) | ||
| 1000V | 4.0MΩ~99.9MΩ | ±(3%+5) | |
| 100MΩ~600MΩ | ±(3%+5) | ||
| Short-Circuit Current | <2mA | √ | |
| Multimeter Specifications | |||
| DC Voltage (V) | 60mV/600mV/6V/60V/600V/1000V | ±(0.3%+4) | |
| AC Voltage（50Hz~1KHz） | 6V/60V/600V/1000V | ±(1%+3) | |
| DC Current (A) | 60mA/600mA | ±(1.0%+2) | |
| AC Current（50Hz~1KHz） | 60mA/600mA | ±(1.5%+2) | |
| Resistance (Ω) | 600Ω/6KΩ/60KΩ/600KΩ/6MΩ/40MΩ | ±(0.9%+2) | |
| Capacitance (F) | 10nF/100nF/1μF/10μF/100μF | ±(3%+5) | |
| Frequency (Hz) | 60Hz/600Hz/6KHz/60KHz/600KHz/1MHz | ±(0.1%+3) | |
| Features | |||
| Display Count | 6000 | ||
| Auto Range | √ | ||
| True RMS | √ | ||
| Diode | √ | ||
| Auto Power Off | √ | ||
| Continuity Buzzer | √ | ||
| Low Battery Indication | √ | ||
| Data Hold | √ | ||
| MAX/MIN | √ | ||
| Data Logging | 99 | ||
| LCD Backlight | √ | ||
| Full Icon Display | √ | ||
| General Characteristic | |||
| Power | 1.5V Alkaline Batteries（LR6)×6 | ||
| LCD Size | 81mm X 46mm | ||
| Product Color | Red and Grey | ||
| Product Net Weight | 505g | ||
| Product Size | 96.7mm X 202.8mm X46 mm | ||
| Standard Accessories | Batterise, Test Lead, Alligator Clip, Carrying Bag | ||
Similar to the Fluke 1857
