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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.
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