Hand-operated Earth Resistance Tester Earth Shaking Meter Earth Resistance Meter Operating Temperature and Humidity: Temperature (-20 to 40)°C; Relative Humidity <80% Test Temperature and Humidity: Temperature (23 ± 5)°C; Relative Humidity <75% Remote Handle Rated Speed: 150 r/min Tilt Influence: When the instrument is tilted 5° in any direction, the variation in its indication value shall not exceed 50% of the accuracy. External Magnetic Field Influence: When exposed to an external magnetic field strength of 0.4 kA/m, the change in instrument indication shall not exceed 100% of accuracy. Insulation Resistance: Not less than 30 MΩ under normal temperature and humidity conditions. Insulation Strength: The insulation between circuits and housing can withstand a 50 Hz sinusoidal AC voltage of 1 kV for 1 minute. Dimensions: 172 × 116 × 135 mm Weight: Approx. 3 kg (including accessories)