READIT-2007 - Indira Gandhi Centre for Atomic Research

By implementing these strategies, there is no guarantee to achieve full protection to
the documents. But we can ensure the fullest precautionary measures to prevent. In
order to meet this precaution of fire, Fire Detection is to be made.
2. DETECTION OF FIRE
Timely detection of fire detection by using proper transducer to sense the different
types of smoke and temperature facilitates in effective control of it.
Fire Detection and Alarm System: Fire Detection and Alarm System is electronic
equipment which detects fire and raises alarm as warning of fire. Fire, generates
smoke, heat and light and all the three parameters have been used for the detection of
fire. Different types of Detectors sense the smoke and heat using different techniques
depending upon the location and probable nature of fire. Typically a cooking place
will have a special type of heat detection mechanism rather than simple smoke
detection. The significance of all the detection system is that they raise alarm just
after the outbreak of fire. The physical guidance system to location of fire is provided
by the indicator panel of the system which shows or displays the exact location of the
place where fire has broken.
Fire Alarm Systems are classified as Conventional and Addressable. A system may
have many numbers of loops and a loop may have different types of sensors and
devices. The advantages of Addressable Systems are: All sensors devices and loops
are uniquely addressed by a number. This feature provides exact geographical
location of fire or faulty device or sensor. The address of senor/device can have
detailed information which can be displayed on the panel where as the conventional
system can only indicates loop number /(s) and not the exact location of the physical
identification number of devices or sensors.
Analogue Addressable Fire Alarm System: The major components of fire alarm
system are the panel, sensors and devices. The fire alarm panel is a microprocessor
based system which controls all the loops and interface ports for various devices and
systems. Each loop consists of local memory and interface modules to interact with
devices and is controlled by a micro controller.
Fig-1: Front panel
Fig-2: Cabling layout
3. FIRE ALARM DEVICES
The fire alarm system can accommodate various devices and sensors. Manual Call
Points, Isolators, Hooters and Response Indicators are treated as devices and other
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