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AEMC 4500
4-Point Ground Resistance Testers, Discontinued

See: AEMC 4 Point Resistance Testers

• Fall-of-potential method
• Measures ground resistance (2- and 3-point) and soil resistivity (4-point)
• Step voltage tests and touch potential measurements
• Selectable: three test currents and five resistance ranges
• Measures very low resistance on large grounding systems and grids
• High test current also enables geological surveys
• Large LCD display for easy reading
• Display includes indicators for excess stray current, high stray voltage, high auxiliary rod resistance and fault connection

The Ground Resistance Tester Model 4500 is a heavy-duty instrument ideal for maintenance crews performing numerous tests. The Model 4500 rejects high levels of interference, and can be used under difficult conditions such as high stray currents that normally affect accuracy. The Model 4500 may be used to perform the following test:

• Three-point measurement of large grounding grids, counterpoises, ground mats, and grounded equipment.
• Soil resistivity tests (4-point measurement), commonly performed by utilities at proposed construction sites. Using soil resistivity analysis, the size and complexity of grounding system construction can be evaluated. The Model 4500 will measure the resistivity of epoxies, cement, ground enhancement materials and many other substances.
• Step or touch potential levels under true fault conditions can be determined by using the Model 4500 to inject a simulated low-level fault into an electrical system. When used in this fashion, the Model 4500 will display readings in volts per fault ampere.
• Two-point tests for continuity tests on bonding or on pre-established grounds.