how to use the grounding resistance tester
1. First, we need to insert two ground probes 21 meters and 41 meters away from the ground, and the depth of insertion is about 1.4 meters.
2. Next, put the grounding resistance tester in a horizontal position and start wiring. After placing it, check whether the pointer points to the center line, and it needs to be adjusted to the scale line of 1.
3. Then adjust the magnification scale to the maximum, and then slowly turn the handle, while turning the pointer of the dial to point to the center line. When you see that the pointer is close to the middle line, you should speed up the shaking so that the speed reaches 121 revolutions per minute. At this time, the magnification mark will be too large, and then adjust the pointer of the dial so that it points to the center line, and then you can read the accurate value.
2. What is the function of the grounding resistance tester
1. The function of the grounding resistance tester is still relatively large, for example, it can measure the value of grounding resistance when carrying out large-scale grounding network. At the same time, it can accurately measure the gradient of surface potential in the grounding grid field.
2. In addition, if the underground conductive resistor can also test the resistivity, it is more suitable for the arrangement of some electric power or post and telecommunications departments and can effectively protect the grounding devices.
3. What problems should be paid attention to when using grounding resistance instruments?
1. When measuring, it is necessary to disconnect the lines of the grounding device and the protected equipment first, so as to fully ensure the accuracy of the measurement results.
2. When the sensitivity of galvanometer is too high, we can insert the probe into the soil slightly lighter. If the sensitivity is insufficient, it can be watered and moistened again.
The above contents specifically introduce how to use the grounding resistance tester correctly, and what its functions are, including what problems should be paid attention to when using it. For more information, you can follow Qijia official website.
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