Author: Noyafa–POE Tester
Live cable manufacturer live cable identification instrument use tutorial Live cable manufacturer cable identification instrument is to inject special pulse modulation signal into the cable through the connecting line, generate a specific frequency characteristic signal, and then receive the signal by the receiver, according to the size and amplitude of the signal Judge the correctness of cable identification. The live cable identification instrument is composed of a signal generator and a receiver. It is easy to carry and has a high success rate. It can be used for power cable erection and migration, maintenance and troubleshooting. It is one of many cables. Here's how to use it.
1. Transmitter wiring method Insert the red and black wiring plugs of the transmission caliper into the two red and black ports corresponding to the signal generator, and clamp the transmission caliper a (see the mark) on the marked cable, the arrow points to the cable terminal, the identified cable Both ends should be grounded reliably. For non-working cables, transmission calipers can also be used to couple the signals on the non-working cables for identification, but both ends of the cable are required to be reliably grounded, and the core wires at both ends are reliably grounded. 2.
Calibration procedure On the identified cable two meters away from the transmitting caliper, clamp the receiving caliper B to the cable. The arrow on the caliper must point to the end of the cable, then check the direction of the current flow and test the connection direction. At this time, the pointer of the receiving ammeter must be deflected to the right, and there will be sound and light prompts, as shown in the figure below.
If the arrow on the receiving caliper B points to the transmitting source, there will be no sound and light prompt, and the ammeter pointer will deflect to the left, remember the deflection direction of the receiving caliper meter. 3. The identification process is at the identification point, using the receiving caliper B to identify each cable.
When identifying, make sure that the arrow on the receiving caliper is always pointing in the direction of the end of the cable, and card-test the cables one by one. On the identified cable, the ammeter pointer of the receiver must be deflected to the right, and an audible and visual alarm prompts. On the other cable, the ammeter of the receiver means that the pointer must be deflected to the left, and there is no sound and light alarm prompt.
The receiver ammeter needle is deflected to the right. At the same time, the sound and light alarm prompt is the cable that needs to be found and identified. The result of this test is unique, that is, no matter how many cables are in the trench, when each cable is identified with receiver caliper B, only one cable (to search and identify the pointer of the receiver ammeter on the cable) goes to the Right deflection, and sound and light alarm prompts at the same time.
Remind that the live cable identification instrument uses the“coupling method”, Affected by the line current, the jaws will generate induced current, which will cause vibration, heat and other phenomena, please don't worry, this will not affect the use. Live cable identification instrument use tutorial Live cable manufacturer Shenzhen Noyafa Electronic Technology Co., Ltd.
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