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20.2.2 Alarm tone composition and duration
The unit produces three alarm tones.
The three pulsed tones correspond to the alarm sounder priorities, High, Medium and Low.
The pulsed tones are generated when the unit encounters an alarm condition. All the
generated tone alarms are accompanied by visual alarm indication.
The High alarm sound consists of 3 tone bursts followed by 2 tone bursts which is repeated
after 1 second with a 4 second gap before restarting (total alarm cycle of 8 seconds).
The Medium alarm sound consists of 3 tone bursts followed by a 8 second gap.
The Low alarm sound consists of 2 tone bursts followed by a 16 second gap.
20.2.3 Alarm tone pitch
High priority alarm tone: c a f - a f
Medium priority alarm tone: c a f
Low priority alarm tone: e c
20.2.4 Alarm sound pressure
The alarm sound pressure level is 70dB.
20.2.5 Alarm colours
High priority: Red
Medium Priority: Yellow
Low priority / Technical Blue
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