Lecture_10.2_Fire_Alarm_System

Lecture_10.2_Fire_Alarm_System - AE202 Section 10.2 Fire...

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AE202 Section 10.2 Fire Alarm Systems Purpose of Fire Alarm System o Save lives by announcing unsafe conditions o Protect property by alerting fire department Definition - Manual system o A system in which the alarm initiating device is operated manually to transmit or sound an alarm signal Definition - Automatic system o One in which the alarm initiating device is operated automatically to transmit or sound and alarm signal Initiating (Detection) Devices - Manual devices o _____________ _________ _____________ o Glass break o Vandalism o Dual action Initiating (Detection) Devices - Automatic devices Heat detectors (fixed temperature) o Senses abnormally high temperatures o Slowest to respond o Lowest false alarm rate o Applications Used in area where smoke and dirt is a problem Used in low temperature location o Rate of Rise Detectors ___________________ Smoke detectors o Ionization Radiation within detector Ionizes air and makes it conductive Permits current flow between electrodes Particles of combustion attach to ions and inhibits current flow Fast response (incipient stage) Prone to false alarms
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  • Fall '07
  • LING,MOSESDF
  • Smoke detector, Alarm Systems, Fire alarm system, Fire Alarm Systems, Alarm Indicating Devices, alarm signal Definition

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