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4500
4-Point Ground Resistance Testers
The Digital Ground Resistance Tester Model 4500 is designed for measuring very low resistance on large grounding systems, such as ground grids and ground mats. It rejects high levels of interference voltages at DC or 60Hz and its harmonics, and can be used under difficult conditions such as high stray currents or excessive auxiliary electrode resistance.
Features:
* 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
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