MH12 Digital Megohmmeter – Insulation Resistance Tester (50V/100V/250V/500V/1000V) with AC/DC Voltmeter, PI, Auto Discharge, Data Storage
Specifications
| Parameter | Value |
|---|---|
| Product type | Digital megohmmeter (insulation resistance tester) |
| Display | Digital + analog bar display |
| Maximum display | 2000 counts |
| Test voltages (insulation) | 50V / 100V / 250V / 500V / 1000V |
| AC voltage range | 10–600V |
| DC voltage range | 10–600V |
| Autoranging | Yes |
| Polarization Index (PI) | Yes |
| Data hold (data retention) | 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 (as provided)
| Function | Range | Basic accuracy |
|---|---|---|
| Insulation test (by test voltage) | 50V / 100V | ±(5 + 10) |
| Insulation test (by test voltage) | 250V | ±(5 + 10) |
| Insulation test (by test voltage) | 500V | ±(5 + 10) |
| Insulation test (by test voltage) | 1000V | ±(5 + 10) |
| AC voltage | 10–600V | ±(1 + 5) |
| DC voltage | 10–600V | ±(0.8 + 5) |
Note: the “±(5 + 10)” / “±(1 + 5)” format is kept as in the supplied parameters (commonly written as % of reading + digits/counts).
The MH12 is a digital insulation resistance tester (megohmmeter) designed for checking insulation condition in cables, motors, transformers and electrical installations. It generates selectable high test voltages and measures insulation resistance, helping you spot moisture, aging insulation or leakage paths before they become faults. The meter also includes AC/DC voltage measurement (10–600V), a clear digital display with an analog-style bar, autoranging and practical features such as data hold, time display and automatic discharge for safer work after insulation testing.
Important correction: this type of instrument is primarily an insulation resistance tester. The provided specs do not describe a true “earth/ground resistance” tester (which normally requires stakes/3-wire measurement), so the product description below focuses on insulation resistance and voltage functions.
Package contents (without batteries)
Item 1: 1 × MH12 megohmmeter
Item 2: 1 × Test lead set
Item 3: 1 × Alligator clip
Item 4: 1 × English manual
Item 5: 1 × Packing box