F
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3.2.4 Classify or determine the laid circuit
Preconditions:
The circuit must be uncharged;
※
The ends of core wires must be twisted together and conduct with each other;
※
Connect the transmitter in a way shown in Fig.3-2-4;
※
The measuring method is the same as that in the example.
※
1.If there is current in the cable, cut off the power first to turn it into an uncharged
state.
2.The ends of core wires without shield must conduct with each other, and must be
twisted together.
3.lf there is only one transmitter for use, conduct multiple measurements by
changing the connection between the transmitter and the cable core wire.
1.When changing the connection between the transmitter and cable core wire,
different circuits can be distinguished if we change the transmission encoding of
the transmitter.
2.Adjustthe transmitting power of the transmitter to adapt to different radiuses of
detection.
3.Purchase a transmitter with different transmission signals when necessary.
3.2.5 Detect circuits laid relatively deep
In dual-pole applications, if the loop line is made of core wires in cables with multiple
core wires (such as NYM 3*1.5mm²), the depth of detection will be greatly limited.
The reason is that the short distance between the feeding line and the loop line causes
a seriously distorted magnetic field. Magnetic field with sufficient strength cannot be
built up at the narrow parts. If a separate loop line is used, this problem would be easily
solved, as the separate conductor can make the magnetic field diffused more strongly.
The loop line may be any kind of conducting wires or cable reels. The important point
is that the distance between the feeding line and the loop line must be longer than the
depth of laying, and in practice this distance is commonly 2m or longer.
Preconditions:
The circuit must be uncharged;
※
Connect the transmitter in a way shown in Fig.3-2-5;
※
The distance between the feeding line and the loop line must be at least 2~2.5m;
※
The measuring method is as shown in the example.
※
1. In this application, the influence of humidity or mortar on the wall to the depth
of locating is insignificant.
2. In the process of detecting the circuit, the stronger the signal displayed on the
Nixie tube of the detector, the closer the cable detected by the detector.
3. Adjust the transmitting power of the transmitter to adapt to different radiuses of
detection.
4. Select the manual mode on the receiver and select suitable receiving sensitivity
to precisely locate the circuit.
Fig 3-2-4
Fig 3-2-5
>2m
Your excellent helper in measuring instruments
.
Your excellent helper in measuring instruments
.
CAUTIONS
HINTS
HINTS
