Carry out the Measurement: Activate the tester to initiate the measurement. The instrument will induce a take a look at present into the grounding system and evaluate the resulting voltage fall. Vertical electrical sounding (VES) .It is comparable to the strategy of electrical profiling is based within the 4-electrode principle. https://personalgrowth98877.blogaritma.com/31694802/getting-my-ground-resistivity-testing-bangladesh-to-work