- **Product Name**: Ground Resistance Tester
- **Model**: ZC-8
- **Operating Temperature and Humidity**: Temperature (-20–40) °C, maximum relative humidity of 80%
- **Calibration Temperature and Humidity**: Temperature (23 °C ± 5 °C), maximum relative humidity of 75%
- **Rated Handle Rotation Speed**: 120 r/min
- **Effect of Tilt**: When the instrument is tilted 5° in any direction, the change in the indicated value does not exceed 50% of the accuracy
- **Effect of External Magnetic Field**: When the external magnetic field strength is 0.4 kA/m, the change in the instrument’s indicated value does not exceed 100% of the accuracy
- **Insulation Resistance**: Not less than 30 MΩ at normal temperature and humidity
- **Dielectric Strength**: The insulation between the circuitry and the housing can withstand a 1 kV 50 Hz sinusoidal AC voltage for 1 minute
- **Dimensions**: 170 × 110 × 164 mm
- **Weight**: Approximately 4 kg (including accessories)
