Triplett Fox 2 – PN: 3382 - Manual (Page 40)

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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.
The TrueTrace feature doubles as a unique latch tester, en-
abling a feature called Trip-Latch. Unlike many latch testers,
which require the user to be near the latch tester to deter-
mine if the circuit being tested has sent a “pulse”, Trip-Latch
allows the user to be near the alarm sensor, in its installed
location, and determine if the sensor is sending a pulse to
the alarm control panel. This feature works with sensors that
have N.O. (Normally Open) or N.C. (Normally Closed) out-
puts, but the pulse output must last for 1 second or more.
The use of a Hound, Hound 2, or cordless telephone is re-
quired.
If testing a N.O. contact, a Hound, Hound 2, or cordless tele-
phone may be used. If testing a N.C. contact, a cordless tele-
phone must be used.
To understand how this feature works, a few simple experi-
ments are suggested. Turn on the FOX 2, setting it to TRACER
TONE. Using a Hound, Hound 2, or a cordless telephone,
listen to the cadence of the Tone….. or if the audio pilot tone
is activated, simply listen to the FOX 2 itself. Short the clip
leads together for about 1 second. Notice how the FOX 2’s
cadence changes. When the clips are shorted together, the
cadence changes almost immediately, and stays at its new
cadence when the clips are unshorted. Hence, in a N.O. cir-
cuit, in response to a momentary short, the cadence changes