LaserLiner CableTracer Pro Bedienungsanleitung Seite 24

7B-2 Locate interrupted cables
- Make the measuring circuit zero-potential.
!
- An interrupted cable must have a transfer resistance of 100 k or higher.
You may use two senders for this application. The second sender is not included in the set but is available
as an accessory. Set the different sender codes in the sender devices and connect the cable to be mea-
sured and the protective earth. See image f in chapter 4. Then turn on the receiver and begin tracing the
course of the cable. The interruption in the cable is located exactly in the middle between the two sender
code values indicated in the LC display. Also follow tips 1 through 3.
Recommended setting for the receiver: Manual search mode, maximum sensitivitiy, see chapter 5C.
Tip 5: The cable interruption may be localised systematically by adjusting the sensitivity of the receiver and
the output power of the sender.
Tip 6: To achieve optimal results, any cables not included in measuring should be earthed. This is parti-
cularly true for any unused individual conductors in multi-core cables and sheathed cables. If these are
not earthed, the fed in signal may lead to crosstalk (due to capacitive and inductive coupling). The cable
interruption can then no longer be adequately localised.
Tip 7: The search for interrupted cables in heated oors follows a similar concept. Ensure that there is no
earthed shielding lm above the heating wires. If necessary, separate it from the earthing connection.
24 GB
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When working with one sender, the exact location of the
g
interruption may not be as easy to nd due to possible
crosstalk of the electromagnetic eld. See image g. In this
case, the receiver displays the transmission signal after the
interruption as a signi cant decrease. The interruption is
located where the signal begins decreasing.
f