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The AEMC 4630 Kit-150ft is a test kit for 3-Point testing that includes the 4630 meter, two 150 ft color-coded leads on spools (red and blue), one 30 ft lead (green), two 14.5" T-shaped auxiliary ground electrodes, one set of five spaded lugs, 100 ft tape measure and carrying bag.
MODELS | 4620 | 4630 | ||
ELECTRICAL | ||||
Range | 20Ω | 200Ω | 2000Ω | |
Measurement Range | 0.00 to 19.99Ω | 20.0 to 199.9Ω | 200 to 1999Ω | |
Resolution | 10mΩ | 100mΩ | 1Ω | |
Open Voltage | ≤42V peak | ≤42V peak | ≤42V peak | |
Resistance Measurement | 128Hz square wave | 128Hz square wave | 128Hz square wave | |
Test Current | 10mA | 1mA | 0.1mA | |
Accuracy | 2% of Reading | 2% of Reading | 5% of Reading | |
Auxiliary Electrode Influence |
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Response Time | Approximately four to eight seconds for a | |||
Withstanding Voltage | 250Vac or 100Vdc | |||
Power Source | Eight C cell batteries (included); | 120/230V 50/60Hz | ||
Battery Life | >2000 15-second measurements; LO BAT indication on LCD | |||
Fuse Protection | 0.1A, >250V, 0.25 x 1.25"; 30kA Interrupt Capacity | |||
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- 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.
