The GEOHM C is a battery powered earth resistance measuring instrument that is ideal for the measurement of soil resistivity. It is a compact, handy, and menu-driven soil resistivity measuring instrument for 3 and 4-wire connections. The tester includes continuous monitoring of interference voltage with indication if allowable limit values are exceeded. All values are available on a large LCD display, and operation is easy with the use of 4 keys.

Measurement of earth resistance for 3 and 4-wire methods, with physical considerations of the potential gradient area as related to dissipation resistance of grounding systems of various sizes. Measurement of soil resistivity with geologic analysis and calculation of dissipation resistance.