Author: Noyafa–CCTV Tester
Question: What are the wiring methods of the cable identification instrument? Answer: Direct connection method (identification of non-energized cables) ⑴ Short-circuit any good phase of the identified cable terminal with the system ground. Disconnect the steel armor from the system ground at the beginning. ⑵ Connect one end of the red clip line to the launcher Question: What are the wiring methods of the cable identification instrument? Answers: Direct connection method (identification of uncharged cables) ⑴ Short-circuit any good phase of the identified cable terminal with the system ground.
Disconnect the steel armor from the system ground at the beginning. (2) Connect one end of the red clip wire to the red terminal of the transmitter and the other end to the phase line of the identified cable. One end of the black clip wire is connected to the black terminal of the transmitter, and the other end is reliably connected to the system ground. (3) Turn on the power switch of the transmitter and observe the indication of the ammeter.
Under normal circumstances, 2/3 of the full scale of the hand swing is sufficient. ⑷ Clip the caliper on the identified cable, and the arrow of the caliper points to the cable terminal. It should be observed that the pointer of the receiver meter shows a periodic swing consistent with the pointer of the transmitter meter, and the polarity indicator light shows a periodic change of on and off, indicating the identification system. normal. At this time, the receiver can be brought to the test site.
⑸ At the test site, use a caliper to clamp each cable in the cable bundle one by one. When a certain cable is stuck, (the caliper arrow always points to the cable terminal) the receiver meter head swings clockwise periodically, and the polarity indicator light turns on and off periodically. This cable is the cable you are looking for. When other cables are stuck, the meter head periodically swings counterclockwise, but the polarity indicator does not light up.
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