MH12 Digital Megohmmeter – Insulation Resistance Tester (50V/100V/250V/500V/1000V) with AC/DC Voltmeter, PI, Auto Discharge, Data Storage
MH12 Digital Insulation Resistance Tester
The MH12 is a digital megohmmeter designed for evaluating insulation condition in cables, motors, transformers and electrical installations. It generates selectable high test voltages and measures insulation resistance, helping detect moisture, degradation or leakage paths before faults occur.
The meter combines a digital display with analog-style bar, automatic ranging and safety-focused features including automatic discharge after testing. In addition to insulation measurement, it provides AC/DC voltage testing from 10–600V for quick verification of live circuits.
Data hold, internal storage for measurements and Polarization Index (PI) support make the device practical for maintenance professionals and field diagnostics.
50V to 1000V insulation testing.
Stores up to 100 test groups.
Automatic voltage discharge.
AC/DC measurement up to 600V.
Specifications
| Parameter | Value |
|---|---|
| Product type | Digital megohmmeter |
| Display | Digital + analog bar |
| Maximum display | 2000 counts |
| Test voltages | 50V / 100V / 250V / 500V / 1000V |
| AC voltage range | 10–600V |
| DC voltage range | 10–600V |
| Autoranging | Yes |
| Polarization Index (PI) | Yes |
| Data hold | Yes |
| Data storage | 100 groups |
| Time display | Yes |
| Automatic discharge | Yes |
| Power supply | 8 × AA batteries |
| Battery included | No |
| Certification | CE |
| High-concern chemicals | None |
Accuracy
| Function | Range | Basic accuracy |
|---|---|---|
| Insulation test | 50V / 100V | ±(5 + 10) |
| Insulation test | 250V | ±(5 + 10) |
| Insulation test | 500V | ±(5 + 10) |
| Insulation test | 1000V | ±(5 + 10) |
| AC voltage | 10–600V | ±(1 + 5) |
| DC voltage | 10–600V | ±(0.8 + 5) |
Package contents (without batteries)
- 1 × MH12 megohmmeter
- 1 × Test lead set
- 1 × Alligator clip
- 1 × English manual
- 1 × Retail box