5.1. Identification of de-energized cables with a live cable identifier
5.1.1 Direct connection conditions
◎ The cable must be de-energized;
5.◎ At least one end of the cable must be known, and the known end must be separated from the system, including disconnecting the neutral and ground wires;
1.2 Signal application
◎ In this method, the direct connection method is used to apply the signal
Turn off the transmitter power switch, insert the output cable into the transmitter's output interface, as shown in Figure 4. Connect the red clip to the cable core, insert the ground spike into the ground (if the ground is hard, you can pour some water on it), and clip the black clip to the ground spike, ensuring a good connection. The ground spike should not be too close to or cross over other cables.
Good contact
Turn on the transmitter power switch and select the frequency:
The transmitter has four frequencies: low frequency, medium frequency, high frequency, and radio frequency;
After selecting the frequency, choose the gear according to the actual situation. The transmitter has high, medium, and low gears. Generally, try to select a lower gear to save battery power. After selecting the gear, the instrument automatically performs impedance matching. Once matching is complete, the transmitter displays the stable current system fault impedance, and the icon "A" begins to rotate.
Note: If the remote end of the cable can be grounded, the signal will be stronger and easier to identify.
Warning: Never connect directly to a live cable. When connecting directly to a cable, make sure the cable is de-energized!!
5.1.3 Signal detection (identification)
◎ Use a cable with four-pin plugs on both ends to connect the receiving coupling clamp to the receiver;
◎ Turn on the receiver power switch and set its frequency to match the transmitter;
◎ Use the receiving coupling clamp to clamp onto the red wire of the transmitter's direct connection cable or at the cable head, reduce the gain so that the signal strength is around 800, and remember the current gain and strength values as the reference values;
◎ At the point to be tested, use the coupling clamp to clamp onto the exposed cable, and find the cable with the strongest signal; that is the cable you are looking for.
5.2. Identification of live cables with a live cable identifier
5.2.1 Coupling conditions
The cable must have a known exposed point
Both ends of the cable must have grounding points or points related to the ground (live cables are already related to the ground through the neutral wire);
The coupling position should be as far away from the ends as possible;
5.2.2 Coupling signal application
The four-core aviation cable provided with the live cable identifier connects one end to the four-core aviation socket on the transmitting coupling clamp and the other end to the transmitter, completing the connection between the transmitting clamp and the transmitter;
Place the transmitting coupling clamp around the exposed point of the cable; this is the signal application point. Note that the coupler must be completely closed;
Turn on the power switch, select the frequency, and the instrument performs impedance matching;
5.2.3 Signal detection (identification)
◎ Use a four-core aviation cable to connect the receiver and the receiving coupling clamp;
◎ At the transmitting point, clamp the receiving coupling clamp onto the cable, reduce the gain so that the signal strength is around 800, and remember the current gain and strength values as the reference values;
◎ At the point to be tested, clamp the receiving coupling clamp onto the exposed cable, and find the cable with the strongest signal; that is the cable you are looking for. If the cable is long, the signal will attenuate to some extent; in that case, compare and find the cable with the strongest signal.
