NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–Cable Length Tester
Cable identification instrument mode Cable identification instrument measurement method Cable identification instrument mode Cable identification instrument use method and measurement steps are as follows: 1. Disconnect the connection point of the grounding trunk from the grounding body, or disconnect the connection point of all grounding branches on the grounding trunk. 2.
Insert two grounding rods into the ground 400mm deep, one is 40m away from the grounding body, and the other is 20m away from the grounding body. 3. Place the megohmmeter on a flat surface close to the ground and wire it.
(1) Use a connecting wire to connect the wiring pile E on the table and the grounding body E of the grounding device′. (2) Use a connecting wire to connect the terminal C on the workbench to the ground rod C 40 meters away from the grounding body'connect them. (3) Use the connecting wire to connect the terminal P on the workbench to the grounding rod P 20 meters away from the grounding body'connect them.
4. Adjust the coarse adjustment knob (there are three adjustable ranges on the coarse adjustment knob) according to the grounding resistance requirements of the measured grounding body. 5.
Shake the shaker evenly at about 120 rpm. When the needle is deflected, adjust the dial until the needle is centered. The grounding resistance of the grounding body under test is multiplied by the reading set by the fine adjustment dial and the coarse adjustment positioning multiple.
For example, if the fine adjustment reading is 0.6 and the coarse adjustment resistor positioning multiple is 10, the measured ground resistance is 6Ω. 6. In order to ensure the reliability of the grounding resistance measurement value, the measurement direction must be changed and the measurement must be re-measured.
Take the average of several measured values as the grounding resistance of the grounding body. Cable Identifier Measurement Method Cable Identifier Mode Shenzhen Noyafa Electronic Technology Co., Ltd.
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