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3.2.3 Search for a short circuit.
Preconditions:
* The circuit must be de-energized.
* Connect the emitter according to Fig. 3-2-3.
* The measurement method is the same as the example.
Caution!
1. If there is current in the cable, cut off the power first.
2. To search for short circuits of insulated wires and cables, the depth of
detection will vary depending on the cables that are twisted together in the
socket. In our experience, only short circuits with impedance less than 20
ohms can be detected correctly. The short circuit impedance can be
measured with a multimeter.
Recommendations
1. If the impedance of a short circuit is greater than 20 ohms, try using the
Find Circuit Break method to find the short circuit. To do this, use a relatively
high current to temporarily connect the fault part (low resistance) or interrupt
it.
2. In the detection process along the tube, if the signal received by the
receiver suddenly attenuates, the detected position is where the short circuit
is located.
3. Adjust the transmit power to suit different sensing radios.
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