Triplett Fox 2 & Hound 3 – PN: 3399 - Manual (Page 53)

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together, leaving the open faulted wire as the 8th wire. Con-
nect the 7 wires to one clip of the FOX 2, and connect this
clip to earth ground. Connect the open faulted wire to the
other clip of the FOX 2. Trace along the path of the cable
(which has already been located) with the HOUND 3, listen-
ing for a sudden drop in the tone level. When this drop is
found, note its position. Continue tracing along the path of
the cable. If the tone level stays low, the point at which the
level dropped is probably the location of the open fault. If
the level comes back up, there was probably an unseen ob-
struction that caused the level to drop. Continue tracing along
the cable until the “true” open is found.
8.1.9.9: Alarm / Security Wires:
Alarm and security wires can be traced like other wires. The
True Trace feature is convenient when the wires are con-
nected to an enclosed magnetic switch. Simply open and
close the protected opening, or use a test magnet, to actu-
ate the sensor. Listen for the cadence to change. If it changes,
you’ve identified the proper wire, and verified that the sen-
sor is working.
If there is an EOL resistor on the line, it may be necessary to
remove it for True Trace to work. To find out if the EOL needs
to be removed, turn on the FOX 2, set it to TRACER TONE,
and connect it’s clips to the wires. While listening to the FOX
2’s pilot tone, short the clips together several times, noting
whether the cadence changes. If it does, the EOL can be left
on the line. If the cadence does not change, the EOL must be
removed.