Earth Resistance/Resistivity/Measurement Method

Earth Resistivity Principle of Earth Resistivity(ρ)

MeasurementAccording to the Wenner 4-pole method, apply AC current "I" between the "E" (earth electrode) and "H(C)" (current electrode) to find out the potential difference "V" between the two potential electrodes "S(P)" and "ES".To obtain the earth resistance "Rg (Ω)", devide the potential difference "V" by AC current "I" where the distance between electrodes is "a" (m). Then use the formula: ρ = 2 • π • a • Rg (Ω • m).

Measurement Method

Stick the four Auxiliary Earth Spikes in o the ground deeply. They should be aligned at an interval of 1-30m(a). The depth should be 5% or less of the interval between the spikes.Note)The supplied Test Leads can be used for the distance between the spikes up to 20m.Connection for Earth Resistivity Measurement