How to operate a manual grounding resistance tester
Shake the meter evenly at about 120 revolutions per minute. When the pointer deflection, then adjust the tuning dial, until now in hand. To adjust the dial by adjusting the readings, multiplied by the coarse positioning multiple, that is to test the grounding resistance of the grounding body. For example, the fine tuning reading is 0.6, and the coarse resistance positioning factor is 10, and the measured grounding resistance is 6.
In order to ensure the reliability of the measured grounding resistance, the azimuth should be changed again. The average value of the measured values is taken as the grounding resistance of the grounding body.
Method for using hand type earthing resistance shaking watch:1. Disconnect the connection point between the grounding line and the ground, or disconnect the connecting points of all the grounding branches on the grounded line.2, the two ground rods were inserted into the ground 400mm deep, one away from the grounding body 40m far away, and the other root away from the grounding body 20m far.3. Place the meter on the level near the ground and then connect.4, according to the requirements of the grounding resistance of the measured grounding body, adjust the coarse adjusting knob (with three adjustable range.
