Harrington Signal Tracker T8000 - Operation Manual - Manual (Page 21)

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HSI #780-0923 FireSpy Tracker Operation Manual
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Appendix A. Glossary
Terms used in this manual are defined as follows:
Acknowledge- An operator action indicating that an off-normal panel condition has been observed.
Alarm Signal- A signal indicating a fire alarm from a manual station, a waterflow alarm, or an automatic
smoke detector.
Alarm Silence Inhibit- An option that prevents silencing the notification appliances for a preset period of
time.
Alarm System- A system of compatible initiating devices, notification appliances, control panel, and
accessories assembled to provide warning signals and remote alarms in the event of a fire.
Alarm Verification- A programmable option that requires a repeated alarm signal from smoke detectors
before indicating an alarm.
Annunciator- A remote display, in communication with the control panel, indicating the status of an alarm
system.
Audible Signal- A sound made by audible notification appliances, such as bells or horns.
Authority Having Jurisdiction (AHJ)- The office or officer responsible for approving fire or safety
systems for the area or community involved.
Auto-Silence- The option by which a panel may automatically silence the notification appliances after a
preset time period time.
Auxiliary Relays- Relays used to energize or de-energize other equipment.
Class A Circuit- A circuit connected so that a single open or ground will not prevent its function. These
are NFPA Style 6 and Style 7 initiating device circuits and NFPA Style Z notification appliance circuits.
Class B Circuit- A circuit connected such that a single open or ground may prevent normal operation.
These are NFPA Style 4 initiating device circuits and NFPA Style Y notification appliance circuits.
Counting Zone- A configuration in which two detectors in a specified area must operate before the alarm
is recognized.
Detector – Ionization (Ion)- A smoke detector using the effect of smoke on the passage of current in an
ionized air chamber.
Detector – Photoelectric (Photo)- A smoke detector sensing reflection or obstruction of a light beam by
the smoke.
Digital Alarm Communications Transmitter (DACT)- A device by which off-normal conditions indicated
on the panel may be communicated to a remote location by dial-up telephone lines.
Drift Compensation- An algorithm applied to changes in a smoke detector’s sensitivity over time in order
to provide a stable level of sensitivity.
End Of Line (EOL)- A resistor or other electronic device terminating a supervised circuit, to allow
continuous monitoring of the connection.
Firefighter Ignore- A provision by which an authorized firefighter may disable detection points found to
be causing a false alarm. This will indicate a system trouble and require repair service.