Earth Resistance Testers
Earth testing by
clamp based or multi spike
Earth resistance testers are divided into two categories. Multi spike systems rely on hammering spikes in the ground to get measurements. To measure soil resistivity four spike systems are required, where the object is to plan the best earthing approach for local soil conditions.
The alternate approach solely for measuring earth values are clamp based systems. They induce a signal into the earth and measure how well the conductor conducts that signal, to get a reading of the earth impedance.
The advantage is that no hammering of spikes is required, so it is a much faster way and simpler way to go about earth testing.