Principle of Earth Resistance Measurement
| This instrument makes earth resistance measurements with fall-of-potential method, which is a method to obtain earth resistance value "Rx" by applying AC constant current "I" between the measurement object "E" (earth electrode) and "H(C)" (current electrode), and finding out the potential difference "V" between "E" (earth electrode) and "S(P)" (potential electrode). |  |
Simplified Measurement (2-Wire) |
Precise Measurement (3-Wire) |
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| 2-Wire Earth Resistance Measurement | 3-Wire Earth Resistance Measurement |
Precise Measurement (4-Wire) |
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| 4-Wire Earth Resistance Measurement |