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Features 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 Battery powered Rugged, dustproof and rainproof field case Can also be used for continuity tests on bonding Color-coded terminals Applications 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 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 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.
