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...
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