50 Clamp-on Ground Resistance Tester Model 64179. SPECIFICATIONS9.1 Reference ConditionsInfluencing Parameters Reference ValuesAmbient temperature 73°F ± 5°F (23°C ± 3°C)Relative humidity 50% RH ±10%Battery voltage 6V ±0.2VMagnetic field < 40A/m DC (no AC field)Electric field < 1V/mOperating position Clamp horizontalPosition of the conductor in the clamp CenteredMeasurement environment No adjacent conductors carrying currentwithin 10cmProximity to magnetic mass > 10cmLoop resistance Non-inductive resistance(20W for the voltage measurement)Measured current, sinusoidal frequency Frequency 50/60HzLevel of distortion < 0.5%Inferior current in loop resistancemeasurementZero for the resistance and inductancemeasurements< 3.75A for the voltage measurement9.2 Electrical9.2.1 Loop Resistance MeasurementMeasurement Range Resolution Accuracy0.010 to 0.099W 0.001W ±1.5% ±0.01W0.10 to 0.99W 0.01W ±1.5% ±0.02W1.0 to 49.9W 0.1W ±1.5% ±0.1W50.0 to 99.5W 0.5W ±2% ±0.5W100 to 199W 1W ±3% ±1W200 to 395W 5W ±5% ±5W400 to 590W 10W ±10% ±10W600 to 1150W 50W 20% approx1200 to 1500W 50W 25% approxAlarm: range of threshold from 1 to 199W.www. GlobalTestSupply .comFind Quality Products Online at: sales@GlobalTestSupply.com