UT512E 2500V Digital Insulation Resistance Tester
Overview
The UT512E is the 2.5 kV entry to the UT513 family, rated CAT IV 600 V. It tests insulation resistance up to 2.5 TΩ at test voltages to 2500 V — well matched to low- and medium-voltage motors, cables, and switchgear where a full 5 kV output isn't required but a wide, high-resistance range still is.
It includes Polarization Index testing, 10% stepped-voltage profiling, a comparison function, and capacitance measurement, with automatic discharge after each test. Results store 999 sets and transfer over USB, and a 14.8 V 5200 mAh rechargeable pack runs a full field day. It's backed by UNI-T's nearly 40 years of test-meter manufacturing.
Key Features
- Test voltage output up to 2500 V
- Insulation resistance up to 2.5 TΩ, accuracy ±(5%+5)
- Polarization Index (PI) timed test
- 10%-of-range stepped-voltage profiling
- Capacitance measurement up to 2 µF
- Comparison function for pass/fail
- Automatic discharge and auto-ranging
- 999-set storage with USB transfer
- CAT IV 600 V; 14.8 V 5200 mAh rechargeable Li-ion
UT512E Details
2.5 kV Insulation Testing
Test voltages to 2500 V and a measurement range to 2.5 TΩ cover low- and medium-voltage insulation work — motor windings, cable, and switchgear — without the higher output of the 5 kV models.
PI & Stepped-Voltage Profiling
A timed Polarization Index test flags moisture and aging, and 10% stepped-voltage profiling stresses the dielectric in stages to reveal marginal insulation that a single fixed reading would pass.
Capacitance & Comparison
Built-in capacitance measurement to 2 µF supports cable and winding work, and a comparison function sets a pass/fail threshold for fast, repeatable go/no-go decisions.
Safety & Field Build
Automatic discharge clears stored charge at the end of each test. The CAT IV 600 V rating and a 14.8 V 5200 mAh rechargeable pack make it ready for industrial and utility field use.
Compare the UT513 Series
| UT512E | UT513A | UT513B | UT513C | |
|---|---|---|---|---|
| Max test voltage | 2500 V | 5 kV | 5 kV | 5 kV |
| Max insulation resistance | 2.5 TΩ | 1 TΩ | 2 TΩ | 5 TΩ |
| Voltage stepping (10% of range) | Yes | — | Yes | Yes |
| PI / DAR diagnostics | PI | PI | PI / DAR | PI / DAR |
| Capacitance measurement | 2 µF | — | — | 0.01–15 µF |
| Data storage | 999 sets | 18 sets | 999 sets | 999 sets |
| Bluetooth app | — | — | — | Yes |
| Safety rating | CAT IV 600 V | CAT III 600 V | CAT IV 600 V | CAT IV 600 V |
Applications
Low- and medium-voltage motor and generator winding tests; cable and feeder insulation checks; switchgear and panel maintenance; and commissioning where a 2.5 kV test voltage is sufficient.
Frequently Asked Questions
What is the UT512E's test voltage and range?
Test voltages up to 2500 V and insulation resistance measurement up to 2.5 TΩ.
How does the UT512E relate to the UT513 models?
It is the 2.5 kV entry to the same family; the UT513A/B/C step up to 5 kV output with higher resistance ranges and additional diagnostics.
Does the UT512E measure capacitance?
Yes — up to 2 µF, alongside insulation resistance, PI, and stepped-voltage testing.
Specifications
| DC Voltage In | 1000 V |
| AC Voltage In | 750 V |
| Capacitance | 2 µF |
| Max Resistance | 2.5 TΩ |
| Resistance Accuracy | ±(5% + 5) |
| Max IR Test Voltage | 2500 V |
| Insulation Resistance | Yes |
| Test Voltage Accuracy | 0% – 20% |
| Short Circuit Current | 5 mA |
| Charge Current | 5 mA |
| Auto Ranging | Yes |
| Comparison Function | Yes |
| Polarization Index | Yes |
| Step Voltage | Yes |
| Auto Discharge | Yes |
| Interface | USB |
| Data Storage | 999 |
| CAT Rating | CAT IV 600 V |
| Battery | 14.8 V 5200 mAh lithium |
| Weight | 1800 g |
| Dimensions | 238 × 166 × 90.5 mm |