The grounding resistance tester under UHV power can help many power workers conduct various power tests more conveniently.

The grounding resistance tester is used to measure the grounding resistance values of various equipment such as power, communication, lightning protection, iron towers, electromechanical, broadcasting and television, buildings, troops, laboratories, workshops, water affairs, large factories, railways, and industries. And departments such as mining enterprises.

1) The soil composition around the grounding system (ground grid) is inconsistent, the geology is different, the tightness and dryness are different, and it is dispersed. There are stray currents on the surface, especially overhead ground wires, underground water pipes, cable sheaths, etc. The impact of testing is particularly significant. The solution is to measure at different points and take the average.

2) The direction of the test line is incorrect and the distance is not long enough. The solution is to find the testing direction and distance.

3) The resistance of the auxiliary grounding electrode is too high. The solution is to splash water on the grounding pile or use a reducing agent to lower the grounding resistance of the current electrode.

4) The contact resistance between the test clip and the grounding measurement point is too high. The solution is to use a file or sandpaper to polish the contact points, and use a probe clip to completely clamp the polished contact points.

5) Interference effect. The solution is to adjust the pay off direction, avoiding directions with significant interference as much as possible, and reducing meter reading fluctuations.

6) Instrument usage issues. The battery level is low, the solution is to replace the battery. The accuracy of the instrument has decreased, and the solution is to recalibrate it to zero.

Therefore, it is necessary to understand the factors that may affect the detection results of the grounding resistance detector in different usage environments.