Resistance Tester Usage

Grounding resistance tester refers to grounded body resistance buried in the ground and soil resistance. It is usually measured with grounding resistance meter (or grounding resistance meter). The shape of the measuring instrument is similar to that of the ordinary insulation shake table, and it is also called a grounding resistance rocking table according to the custom. The shape of the rocking watch is slightly changed with the model, but the method of use is basically the same. The grounding resistance meter is attached with two ground probes and three wires. The method of use and measurement steps are as follows:

(a) Grounding resistance tester (b) Connecting cable (c) Measure the grounding rod 1. Disconnect the connection point between the grounding trunk and the grounding body, or disconnect the connection point of all grounding branches on the grounding trunk.

2. Insert two ground rods into the ground 400mm deep, one from the grounding body 40m away, and the other from the grounding body 20m away.

3. Place the rocking watch in a flat place near the grounding body, and then perform wiring.

(1) Connect the grounding body E' of the wire stub E and the grounding device on the table with a connecting wire.

(2) Use a connecting wire to connect the wire post C on the watch and the grounding rod C′ 40 m away from the grounding body.

(3) Use a connecting wire to connect the wire post P on the watch and the grounding rod P′ 20m away from the grounding body.

4, according to the measured grounding body ground resistance requirements, adjust the coarse adjustment knob (there are three adjustable range).

5. Shake the shakes evenly at about 120 rpm. When the hands are deflected, the jog dial is adjusted until the hands are centered. The reading after setting with the fine-adjustment dial is multiplied by the coarse-adjustment positioning multiple, which is the grounding resistance of the measured grounding body. For example, if the fine tuning reading is 0.6, and the rough adjusted resistance positioning multiple is 10, then the measured grounding resistance is 6Ω.

6. In order to ensure the reliability of the measured grounding resistance, the bearing should be changed and retested. Take the average of several measured values ​​as the grounding resistance of the grounding body.

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