AEMC 6471
4-Point Ground Resistance Tester

  • Test ground resistance using the 2 clamp method (no auxiliary rods needed)
  • 2- and 4-Pole Bond Resistance/Continuity measurement (DC Resistance) with automatic polarity reversal
  • 3-Pole Fall-of-Potential measurement with manual or automatic frequency selection
  • 4-Pole Soil Resistivity measurement with automatic calculation of Rho (ρ) and user selection of the Wenner or Schlumberger test method
  • 3-Pole Earth Coupling measurement
  • Manual and Automatic frequency scan from 41 to 513Hz for optimum test accuracy in electrically noisy environments
  • Selectable test voltage of 16 or 32V up to 250mA of test current
  • Auto-off power management
  • Automatic recognition of all electrode connections and their resistance value
  • Stores up to 512 complete test results in internal memory
  • Optically isolated USB communication
  • Remote set up and operation of all measurements using DataView® software
  • Rechargeable NiMH batteries from wall charger or vehicle power
  • Rugged dustproof and rainproof field case – IP54 rated in closed position
  • Grounding standards IEC 61557 parts 4 and 5 compliant
  • Includes DataView® software for data storage, real-time display, analysis, report generation and system configuration
Click here for a larger image of the AEMC 6471 Ground Resistance Tester (Digital, 3-Point, 4-Point, clamp-on, DataView Software)Click here for a larger image of the AEMC 6471 Ground Resistance Tester (Digital, 3-Point, 4-Point, clamp-on, DataView Software)
AEMC 6471 Shown

Product Information
Datasheet 330 KB pdf

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.

Functional Displays
4-Point Bond Test 3-Point Fall-of-Potential Test Two Clamp Test
4-point bond test 3-Point Fall-of-Potential Test Frequency Current Schlumberger Test
The 4-Point Bond test displaying lead connections, bond resistance test results, test voltage and current. The 3-Point Fall-of-Potential test displaying test lead connection, grounding electrode resistance, test voltage and frequency. The 2 Clamp method displays clamp connection resistance, test current and frequency.
Data Storage Schlumberger Test Wenner Test
Memory Recall Schlumberger Test Wenner Test
Memory Recall displays test results stored at a specific memory location. The Schlumberger test displays test lead connection, soil resistivity (ρ) test results, test electrode resistance and more. The Wenner test displays test lead connection, soil resistivity (ρ) test results, electrode spacing and resistance.
2 Clamp Measurement Range 0.01Ω to 500kΩ
Resolution 0.01Ω to 1Ω
Measurement Frequency Auto: 1367Hz 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 user selectable or automatic selection
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 of test results in Ω-meters, Ω-cm or Ω-feet
Range(Auto-Ranging) 0.01 to 99.99kΩ; ρ Max: 999kΩm
Resolution 0.01 to 100Ω
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 + 1cts
Resistance Measurement(Bond Testing) Measurement Type 2-Pole (with lead resistance compensation) or 4-Pole (Kelvin sensing) user selectable
Range(Auto-Ranging) 2-Pole 0.01Ω to 99.9kΩ; 4-Pole 0.001Ω 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
Communication Optically Isolated USB
Power Source 9.6V rechargeable battery pack
Recharging Source 110/220 50/60Hz external charger with 18Vdc, 1.9A output or 12V vehicle power
rdering Information
Model Description Buy Online Price
MFR ID: 2135.49
AEMC 6471 Ground Resistance Tester (Digital, 3-Point, 4-Point, clamp-on, DataView Software) Buy Now Sale $2,515.50
(Reg. $2,795.00) 
6471 KIT-300FT
MFR ID: 2135.50
AEMC Ground Resistance Tester 6471 Kit-300ft (Model 6471 & Cat. #2135.36) Buy Now $3,295.00
Included Accessories
  • 1 - Set of 2 SR182 Current Probes
  • 1 - Rechargeable NiMH batteries
  • 1 - Heavy-duty field case
  • 1 - DataView® software for data storage
Optional Accessories
MFR ID: 2135.71
AEMC MN82 AC Current Probe Buy Now $299.00
MFR ID: 2135.72
AEMC SR182 AC Current Probe Buy Now $369.00