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AEMC 4610
4-Point Ground Resistance Tester & Kits

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

Applications

The Ground Resistance Tester Model 4610 is a rugged, easy-to-use instrument ideal for maintenance crews performing numerous tests. The Model 4610 is designed to reject high levels of interference, so it can be used under difficult conditions such as high stray currents that normally affect accuracy. The Model 4610 may be used to perform the following tests:

• 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 likely to occur.
• Four-point tests or soil-resistivity measurements. Locating areas of lowest soil resistivity is essential for achieving an economical grounding installation.
• Touch potential measurements (an alternative to three-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 (the outline of the part of equipment in contact with the earth) is comparable to the size of the ground to be tested.
• Two-point tests for continuity on bonding or on pre-established grounds. This test is commonly performed in urban environments where proper auxiliary electrode placement may be obscured by confined real estate. Measurements are referenced against a good local ground conductor.

The Ground Resistance Tester Model 4610 is available alone or as a complete kit. The kit includes four auxiliary ground electrodes, two 300 ft leads on reels with wind-up handles, one 90 ft lead and one 16 ft lead in hard carrying case.