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The Ground Resistance Tester Model 6471 is a portable measurement instrument designed to measure Ground Resistance with 2 clamps (no auxiliary rods), Bond/Connection Resistance (2-Pole and 4-Pole Kelvin sensing), Ground Resistance (3-Pole or 4-Pole), Ground Coupling Resistance, and Selective Ground Resistance, Soil Resistivity (Wenner or Schlumberger method). The Model 6471 measures from 0.01 to 99.99kΩ and is auto-ranging, automatically seeking out the optimum measurement range, test frequency and test current.
Easy-to-use - Simply connect the leads, select the test mode, press Start and read the results. Up to 512 test results can be stored in internal memory for later recall to the display or downloaded to a PC via DataView software. The Model 6471 is Cat IV rated to 50V and is over voltage protected to more than 250VAC against accidental connection to live circuits. The voltage is also displayed on screen. In the event of a system fault, the Model 6471 can withstand 250VAC.
Additional features of the Model 6471 include a heavy-duty field case sealed against dust and water when closed (the test button is also sealed against the elements); manual and automatic test frequency selection from 41 to 513Hz; user selectable 3-Pole Fall of Potential or 4-Pole Soil Resistivity test methods and user selectable 2-Pole or 4-Pole Bond Resistance test method. The Ground Resistance Tester Model 6471 is rugged, easy-to-use and ideal for maintenance crews performing numerous tests. It exceeds mechanical and safety specifications for shock, vibration and drop tests per IEC standards. The adjustable test frequency provides for rejection of high levels of interference, allowing it to be used under difficult conditions such as high stray currents that affect accuracy.
MODEL | 6471 |
ELECTRICAL | |
2 Clamp Measurement | |
Range | 0.10 to 500Ω |
Resolution | 0.01 to 1Ω |
Measurement Frequency | Auto: 1611Hz Manual: 128Hz-1367Hz-1611Hz-1758Hz |
3-Point Measurement | |
Range (Auto-Ranging) | 0.09Ω to 99.9kΩ |
Resolution | 0.01Ω to 100Ω |
Test Voltage | Nominal 16 or 32Vrms user selectable |
Resistance Measurement Frequency | 41 to 513Hz automatic or user selectable |
Test Current | Up to 250mA |
Accuracy | ±2% of Reading + 1ct @ 128Hz |
Soil Resistivity 4-Point Measurement | |
Test Method | Wenner or Schlumberger selectable with automatic calculation in Ω-meters |
Range (Auto-Ranging) | 0.01 to 99.99kΩ; ρ max: 999kΩm |
Resolution | 0.001 to 10Ω |
Test Voltage | 16 or 32V user selectable |
Frequency | From 41 to 128Hz selectable |
External Voltage Measurement | |
Range (Auto-Ranging) | 0.1 to 65.0Vac/dc – DC to 440Hz |
Accuracy | ±2% of Reading + 1ct |
Resistance Measurement (Bond Testing) | |
Measurement Type | 2-Pole (with lead resistance compensation) or 4-Pole (Kelvin sensing) user selectable |
Range (Auto-Ranging) | 2-Pole 0.02 to 99.99kΩ; 4-Pole 0.02 to 99.99kΩ |
Accuracy | ±2% of Reading + 2cts |
Test Voltage | 16Vdc (+, - or auto polarity) |
Test Current | Up to 250mA max |
Data Storage | |
Memory Capacity | 512 test results (64KB) |
Communication | Optically Isolated USB |
Power Source | 9.6V rechargeable battery pack (included) |
Recharging Source | 110/220V, 50/60Hz external charger with 18Vdc, 1.9A output |