Harrington Signal Tracker T8000 - Operation Manual - Manual (Page 12)

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HSI #780-0923 FireSpy Tracker Operation Manual
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2.5.8 Programming mode
While the panel is in programming mode, the panel is still performing its normal monitoring functions. You
will need to reset the panel in order to review and address any events that occur while in programming
mode.
2.5.9 Other conditions
The fire drill test turns on building notification devices, output modules, and relay outputs according to
how they are programmed.
The walk test is a special operating mode. See 3.1.2 Walk test for details.
2.6 Features
2.6.1 Alarm Verification
The panel performs alarm verification on photo and ion intelligent smoke detectors(Apollo XP95 only).
The verification time is a global system program selection of 0 to 60 seconds.
2.6.2 Drift Compensation
The panel performs drift compensation on all addressable smoke detectors that don't have drift
compensation built in. Drift compensation counteracts changes in each detector's sensitivity over time.
Sensor drift is typically caused by dirt or dust in the sensing chamber (indicated by a positive drift value),
but it can also be caused by changes in the detector's electrical components due to long-term exposure to
harmful environmental conditions (a negative drift value). Drift compensation allows the panel to more
accurately determine the threshold for a genuine fire alarm, where a non-drift-compensated detector
under the same conditions would cause a nuisance alarm or an alarm to go unreported. However, there is
a maximum amount of drift that can be compensated. When the detector reaches the limit, it needs to be
serviced or replaced. The panel reports a trouble event when a detector reaches the drift limit.
The analog value that the panel displays for a detector is calculated from two numbers: the base value
(always 23) and the drift value (-15 to +15). A new or recently cleaned detector reports a raw analog
value of 23. The drift value is a long-time average of a detector's deviation from 23. For example, if a
detector reports a raw analog value of 28 for several weeks, it will eventually have a drift value of +5 (raw
value - base value = drift value, or 28 - 23 = +5). The panel will calculate a compensated value of 23 (raw
value - drift value = compensated value, or 28 - (+5) = 23). So the panel is able to use a consistent
numeric value over the long term serviceable operation of the detector.
2.6.3 Releasing
The panel provides 16 releasing circuits. The interface to a releasing device consists of a power source,
an Apollo / I-Spy input/output (IO) module, a URM relay, and a polarizing end-of-line device. The modules
needed for the releasing function are available pre-assembled and pre-wired in a cabinet. The power
source can be a NAC circuit on the Tracker panel set to continuous auxiliary power mode or any UL864
listed control unit with a power limited output rated Regulated 24 DC.
2.6.4 Smoke Control
The smoke control interface relies heavily upon the following items.
Fan and Damper Control Module (FDC)
An FDC is an SLC addressable output device that has timed supervisory functions needed for smoke
control operation. The FDC’s output controls a fan or damper and the input monitors the state of the fan
or damper. The first two of the FDC’s group slots are special “smoke control” groups, so sets of FDCs can
work in conjunction to turn on and turn off sets of HVAC components (intake and exhaust fans and
dampers). For example, to exhaust a floor, the FDCs controlling the exhaust fans and exhaust dampers
will turn on, while the FDCs controlling the intake fans and intake dampers will turn off.