Triplett Hound 3 – PN: 3392 - Manual (Page 26)

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Because of the way that coax is constructed, it is not pos-
sible to find an open in the center conductor. It is possible to
find an open in the shield, if the shield is not shorted to the
center conductor or ground. Connect the center conductor
of the coax to earth ground. Connect the shield and center
conductor at the far end of the coax to earth ground. Con-
nect one clip of the FOX or FOX2 to an earth ground. Experi-
mentally connect the other clip of the FOX or FOX 2 to the
shield of the coax, while listening to the tracer tone on this
clip with the HOUND 3. If the level of the tracer tone drops
significantly when the clip is connected to the shield, the
shield is probably grounded and can’t be traced to the open.
If the level of the tracer tone doesn’t drop much, leave the
clip connected to shield. Using the HOUND 3, follow the path
of the coax by finding the strongest signal. An abrupt drop
in the tracer tone level will occur at the point of the open.
Keep in mind, however, if tracing unseen coaxes in the wall
or ceiling, that the wires may pass behind a metal object
(like a furnace duct) that prevents the HOUND 3 from pick-
ing up the tracer signal, or the coaxes may diverge from the
path of the receiver. Before assuming that the open has been
located, try finding the signal nearby or in an adjacent at-
tached wall or ceiling. Also keep in mind that it may not be
possible to find the open in all situations, because of the
number variables involved.
7.2.6: Power Wires, Tracing and Finding Faults
The FOX or FOX 2 and HOUND 3 cannot trace or identify
“live” power wires. To use a FOX or FOX 2 and HOUND 3 to