Test method of clamp ground resistance tester

The traditional grounding resistance measurement method is the voltage-current method. The traditional method must trip the ground wire and hit the auxiliary ground electrode. The ground electrode to be tested is separated from the grounding system; the voltage electrode and current electrode must be driven into the soil at the specified distance as auxiliary electrodes for measurement. It also belongs to the digital clamp meter of the earth resistance tester.

Use the clamp ground resistance tester to test the ground resistance value, just turn the clamp of the clamp meter around the ground wire to be tested and it can be read from the LCD screen.

The accuracy of the clamp ground resistance tester: The accuracy of the traditional test method depends on the position between the auxiliary electrodes and the relative position between them and the grounding body. If the position of the auxiliary electrode is restricted and cannot meet the calculated value, so-called distribution error will be caused. For the same grounding body, different auxiliary electrode positions may cause the measurement results to have a certain degree of dispersion. And this dispersion will reduce the credibility of the measurement results.

The test principle adopted by the clip-on ground resistance tester has been successfully applied abroad for many years. There is no auxiliary electrode when measuring with this method, and there is no error in the arrangement. When the test is repeated, the results are consistent.

There are no restrictions on using a clip-on ground resistance tester. Although from the measurement principle, the clip-on ground resistance tester must be used with a ground loop, but as long as the user can effectively use your surrounding environment, the clip-on ground resistance tester can measure single-point grounding systems.