21
TM30 User Manual v. X1.0
Near cable method
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Connect transmitter between the cable’s phase (L) and neutral (N) wires.
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Choose
Near cable
mode with receiver. Use the receiver in upright position or
upside down as in the figure, so that either nose groove spot is close to the floor.
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Trace the cable route by following the signal minimum.
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It is usual that changes in cable depth and cable’s back and forth looping affect
how clearly the minimum can be detected.
Cable route method
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Connect one transmitter output terminal to the cable shield and second output to
a good grounding, e.g. to the feeding cable’s protective earth PE wire.
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Choose
Cable route
mode with receiver. Trace the cable route by following the
signal minimum in the receiver nose direction.
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Cable route
method works better especially with cables that have an open fault
(cut wire).
Task: A short circuit in a floor heating cable needs to be traced.
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Connect transmitter between the
shorted
wires of the cable (in the below figure
phase and neutral are shorted). Leave the third wire unconnected.
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Choose
Near cable
mode with receiver. Again, use the receiver upside down, so
that its nose topside groove marked spot is close to the floor.
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Monitor signal strength along the cable route. At fault spot signal gets stronger
and then quickly weakens or disappears.
