AS 1603.3:2018 pdf free.Automatic fire detection and alarm systems Part 3: Heat alarms.
4.4 Alarm condition
4.4.1 Alarm condition audible indicator
4.4.1.1 Signal pattern
The alarm signal pattern shall be in accordance with either ISO 8201 or ISO 7731.
4.4. 1 .2 Signal pattern level—Optional function
Where this function is provided, the alarm condition aural signal pattern shall commence sounding at a level not greater than 45 dBA and rise gradually to the maximum level of not more than 105 dBA over a period of between 3 s to 12 s (see Clause 5.16).
4.4. 1 .3 Signal pattern frequency characteristics—Optional function
Where this function is provided, the signal pattern shall have a fundamental frequency of
520 Hz with odd harmonics to approximate a square wave.
4.4.2 A Ia rin conditio,i ‘i’is ia 1 indicator
Heat alarms shall be provided with an integral visual alarm indicator, by which the individual heat alarm, when in alarm condition, can be identified. The visual alarm indicator shall be red in the alarm condition. The indicator shall flash or be continuously illuminated when the alarm condition is present.
Visual alarm indicators shall not operate on interconnected heat alarms that have not reached their response threshold (Ath). This visual alarm indicator may also perform other additional functions, provided the alarm indication is distinct from any additional function. The failure of any visual alarm condition indicator shall not prevent the alarm condition.
4.5 Main power source visual indicator
A heat alarm intended for connection to the external main power source shall be provided with a visual indicator. The indicator shall be continuously illuminated when the power source is present. The indicator shall be green when lit, but may extinguish in the alarm condition. The failure of any visual condition indicator shall not prevent the alarm condition.
4.6 Fault condition visual indicator—Optional function
Where this function is provided, the following requirements apply.
The heat alarm shall be provided with an integral visual fault condition indicator that is amber or yellow when lit. The indicator shall flash or be continuously illuminated when the fault condition is present. The indicator may be combined with the alarm condition visual indicator provided the fault visual indicator is suppressed during the alarm condition. The failure of any visual fault condition indicator shall not prevent the alarm condition.
4.7 Heat alarm signals—Requirements for heat alarms with additional features.AS 1603.3 pdf download.