Observed limits for insulation measurement
- For new plants (dry rooms): 1000 ohms x volts of operating voltage (eg at 230 volts> 230 kOhms)
- For new installations (wet rooms, outdoors): 500 ohms x volts of operating voltage
- Earthed devices: 1000 ohms x volts of operating voltage
- Protected devices: 2 MOhm
- Power tools: 2 MOhm
- Protective extra-low voltage: 250 kOhm
- Electrical measuring devices: 5 MOhm
- Common test voltage values are 100 volts for low voltage and telecommunication systems, 500 volts for building installation and home appliances, 1000 volts for low voltage motors and transformers
| Measuring range | |
| AC voltage (40 ... 400 Hz) | 750V |
| Resolution | 1V |
| Accuracy | ± 0.8% ± 3 dgt |
| DC voltage | 1000V |
| Resolution | 1V |
| Accuracy | ± 1.2% ± 10 dgt |
| Resistance | 40 Ω / 400 Ω |
| Resolution | 0.01 Ω / 0.1 Ω |
| Accuracy | ± 1.2% ± 3 dgt |
| Insulation resistance | 4 MΩ / 40 MΩ / 400 MΩ / 4000 MΩ |
| Resolution | 0.001 MΩ / 0.01 MΩ / 0.1 MΩ / 1 MΩ |
| Insulation resistance | |
| 125V | ± (2% + 10 dgt) / ± (2% + 10 dgt) / ± (4% + 5 dgt) / ± (5% + 5 dgt) |
| 250V | ± (2% + 10 dgt) / ± (2% + 10 dgt) / ± (3% + 5 dgt) / ± (4% + 5 dgt) |
| 500V | ± (2% + 10 dgt) / ± (2% + 10 dgt) / ± (4% + 5 dgt) / ± (4% + 5 dgt) |
| 1000V | ± (3% + 10 dgt) / ± (2% + 10 dgt) / ± (2% + 5 dgt) / ± (4% + 5 dgt) |
| Continuity test | Beep: ≤ 35 Ω, test current ≤ 200-mA |
| Equipment supply | 6 x 1.5V AA battery |
| Environmental conditions | 0 ... 40°C / 32 ... 104°F, <80% RH (operation) -10 ... 60°C / 14 ... 140°F, <70% RH (bearing) |
| Dimensions | 200 x 92 x 50 mm / 7.9 x 3.6 x 2 in |
| Weight | 700 g / 1.5 lbs (with battery) |
| Standardizations | IEC10101, CAT III 1000V |
