AEMC Model 6470

4-Point Ground Resistance Testers

Model 6470 [Catalog No. 2135.01]  4-Point Ground Resistance Testers


  • 3-Point Fall-of-Potential measurement
  • 3-Point earth coupling measurement
  • Manual or automatic frequency scan from 40 to 513Hz for test accuracy in electrically noisy environments
  • Earth coupling testing
  • Selectable test voltage 16 or 32V up to 250mA test current
  • 4-Point soil resistivity measurement with automatic calculation of Rho and user selection of Wenner or Schlumberger test method
Characteristics Cont’d:
  • 2- and 4-Wire DC resistance measurement (Bond testing) with automatic polarity reversal
  • 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 supplied
  • Rechargeable NiMH batteries from wall charger or vehicle power
  • Rugged dustproof and rainproof field
  • Includes DataView® software
  • 3-Point measurements of resistance to ground of ground rods and grids. 3-Point measurements are used when electrode or grid can be easily disconnected.
  • 4-Point tests or soil resistivity measurements. Locating areas of lowest soil resistivity is essential for achieving an economical grounding installation.
  • Touch and step potential testing measurements. These tests are recommended when the ground cannot be disconnected, where ground faults are highly likely to occur, or when the “footprint” of grounded equipment (the outline of the part of equipment in contact with earth) is comparable to the size of the ground to be tested.
  • 2- or 4-Wire tests for continuity tests on bonding or on grounding systems. Test is a DC resistive test using 250mA or more and is used to check bonding of all connection points on the ground system.
  • Earth coupling measurement and display. Used to estimate the influence of two earth resistance systems that are not connected to each other.
Product Description:
The Digital Ground Resistance Tester Model 6470 performs grounding resistance, earth coupling measurement, soil resistivity and bonding tests. This direct reading tester measures from 0.01 to 99,000   Ω, and is auto-ranging, automatically seeking out the optimum measurement range test current and test frequency. Easy-to-use — simply connect the leads, select the test mode, Press-to-Measure and read the results. Up to 512 test results can be stored in internal memory for later recall to the display or download to a PC for analysis and hard copy reports.
3-point Measurement
Range (auto) 0.01Ω to 99.99kΩ
Measurement 0.01Ω to 100Ω
Resolution Nominal 16 or 32V user selectable
Test Voltage 40 to 513Hz user selectable or automatic selection
Resistance Measurement Frequency Up to 250mA
Accuracy ±2% of Reading + 1ct
Earth Coupling Meas. Yes
Soil Resistivity
Test Method Wenner or Schlumberger selectable with automatic calculation of test results in Ω-meters or Ω-feet
Range (auto) 0.01 to 99.99kΩ
Resolution 0.01 to 100Ω
Test Voltage 16 or 32V user selectable
Frequency 73, 91.5, 101, 110 or 128Hz selectable
External Voltage Meas.
Range (auto) 0.1 to 65.0V – DC to 500Hz
Accuracy 2% of Reading + 2cts
Resistance Measurement (Bond Testing)
Measurement Type 2-Point (with lead resistance compensation) or 4-Point (Kelvin sensing) user selectable
Range (Auto-Ranging) 2-Point 0.01Ω to 99.9kΩ; 4-Point 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
Automatic Report Generation Yes – tabular listings and Fall-of-Potential plots
Power Source Eight 1.2V NiMH rechargeable batteries
Recharging Source 110/220 50/60Hz external charger with 18VDC, 1.9A output or 12 VDC vehicle power
General Specifications
Display Custom 256 segment multi-line LCD
Backlit Blue electroluminescent
Connection 4mm recessed banana jacks
Software DataView® graphing, analysis and reporting software
Operating Temp. 114° to 122 °F (-10° to 50°C)
Storage Temp. -40° to 158°F (-40° to 70°C)
Dimensions 9.4 x 12.8 x 4.33″ (240 x 185 x 110mm)
Weight 7.5 lbs (3.5kg)
Case Polycarbonate
Protection IP54 with cover closed
Mechanical Shock EN 61557
Vibration Test EN 61557
Drop Test EN 61557
Dielectric Test 3kV 50/60 Hz
Safety Rating EN6101-1 50V Cat IV, Pollution Degree 2
Double Insulation Yes
CE Mark Yes
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