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Model 4630 4-Point Resistivity Meter

Model 4630 4-Point Ground Resistance Tester
Prep FeeDailyMonthly
$ 30 $ 75 $ 950

The Model 4630 ground resistivity meter performs soil resistivity and ground resistance tests. Auto-ranging, the tester measures 0 to 2000Ω. This resistivity meter surpasses the IE standards for mechanical and safety specifications for shock, vibration and drop tests. Designed to reject high levels of noise interference, it can be used when there are high stray currents that normally would decrease accuracy.

Durable and simple to use, the Model 4630 ground resistance tester is perfect for use by maintenance crews that need to perform frequent tests. Powered by 9.6V, 3.5 Ah NiMH rechargeable batteries, the model 4630 has a built-in recharge circuit that can be plugged into a standard outlet. Testing can be performed while charging is taking place.



  • Measures soil resistivity (4-Point) method
  • Measures ground resistance (2- and 3-Point) Fall-of-Potential method
  • Step voltage tests and touch potential measurements
  • Auto-Ranging: automatically selects the optimum range
  • Designed to reject high levels of noise interference
  • Extremely simple to operate: connect - press - read
  • LED on faceplate informs operator of high input noise, high auxiliary rod resistance and fault connections
  • AC powered with rechargeable NiMH batteries
  • Rugged, dustproof and rainproof field case
  • Can also be used for continuity tests on bonding
  • Color-coded terminals


  • Touch potential measurements, an alternative to 3-Point tests in evaluating electrical safety. This test is recommended when the ground cannot be disconnected, where ground faults are highly likely to occur, or when the "footprint" of grounded equipment is comparable to the size of the ground to be tested.
  • Four-Point tests or soil resistivity measurements. Locating areas of lowest soil resistivity is essential for achieving an economical grounding installation
  • Three-Point measurements of resistance to ground of ground rods and grids. Three-Point measurements are generally used when the electrode or grid can be easily disconnected, if corrosion is suspected, or in circumstances where ground faults are unlikely to occur