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30
USER MANUAL
5.3 Cable breakdown location
CAUTION!
The ferromagnetic armature over the cable conductor may reduce
the detected signal strength so the search shall be made at
maximum possible current
5.3.1
Finding of short-circuited conductors
In Figure 15 shows the diagram of tracing the short-circuited cables.
The Receiver shall be brought along the target utility, and the signal
strength shall be controlled on the peak scale. The signal strength
may change before the shorted area depending to the cable lay
pitch. The signal fluctuation stops behind the short-circuited area,
and signal strength may drop (case 1) or rise (case 2).
In
the first case, the «dead short» takes place, when only the cable
conductors are shorted. In the second case, the cable conductors are
shorted to each other and to the armature.
Figure 15
– Layout and signal diagram at the method of search of short-circuited wires
5.3.2
Location of shorted conductor-armature areas
The layout of location of conductor-armature shorted area is shown
in Figure 16.
The signal strength may change before the shorted area depending
to the cable lay pitch. The signal fluctuation behind the short-circuited
area remains the same, and signal strength rise abruptly.