LaserLiner CableTracer Pro Mode D'emploi page 27

7C
Two-pole applications (common forward and return conductors)
These measurements may be taken in properly connected electric circuits (without cable interruptions). In
this case, the sender is connected to two conductors in a common cable. The high-frequency signal of the
sender goes back to the pick-up via the forward and return conductors. Measurements may be taken with
or without voltage.
The detection depth is a maximum of 0.5 m and is dependent on the surrounding material.
Tip 11: When measuring under voltage, the individual phases (L1, L2, L3) may be distinguished, for exam-
ple for sockets, lampholders, light switches etc.
– For safety reasons, the measuring circuit should be zero-potential.
!
– When working under voltage, be sure to follow the safety instructions.
– Additional earth wires and shieldung in the cable reduce the detection depth of the receiver.
– Shielding (such as metal coverings, metal supports etc.) in the vicinity reduces the range.
Examples for single-pole applications
7C-1 Locate short-circuits
– Make the measuring circuit zero-potential.
!
– The short-circuit resistance must be less than 20 ohm. This can be determined using a multimeter.
If the resistance is > 20 ohm, you may be able to find the defect by searching for interrupted
cables. See chapter 7B-2 on how to do this.
Connect the sender to short-circuited conductor and switch it on. Then turn on the receiver and begin
searching. The receiver is able to trace the signal up to the location of the short-circuit. See image k.
Adjust the receiver's sensitivity and the sender's output power little by little until you have located the
short-circuit.
Recommended settings for the receiver: Manual search mode, minimum sensitivitiy, see chapter 5C.
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