When measuring the grounding resistance, if all factors are relatively stable,Earth Resistance Tester the grounding resistance of the grounding electrode has a confirmed value and can be accurately measured,Earth Resistance Tester but during the test, many external factors will have unpredictable effects on the measurement results. It is often encountered that the grounding resistance tester has unstable readings,Earth Resistance Tester which results in measurement errors and affects the fairness of the data,Earth Resistance Tester so pay attention to these five items during the measurement process.

The laying direction of the electrodes should be based on conductors such as underground pipelines to prevent errors caused by uneven soil resistivity. If the principle is not possible,Earth Resistance Tester the intervals between them can be crossed straight, do not overlap in parallel, on the ground between the three electrodes , Do not have large-area conductors. The total resistance of the extended test line of the grounding resistance tester should be less than 1 Ω,Earth Resistance Tester and the standard calibration data of resistance under application humidity should be used. Soil moisture content, temperature,Earth Resistance Tester and additional salt will directly affect the earth resistivity,Earth Resistance Tester and then change the electrical conductivity of the soil around the grounding resistance. If the soil electrical conductivity increases, Earth Resistance Tester the ground resistance of the electrode also increases. The earth resistivity is affected by the grounding, and the grounding resistance value will be greatly changed. Therefore,Earth Resistance Tester the grounding resistance should be measured before and after construction.

The measurement of grounding resistance should be carried out without water on the ground,Earth Resistance Tester because if the water content in the soil is large,Earth Resistance Tester the grounding resistance will be low. Pay attention to noise interference. The large loop current on the ground wire will interfere with the measurement,Earth Resistance Tester thereby affecting the accuracy of the result, and even making the test of the grounding resistance tester impossible.

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