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Audibility test of fire alarm

Guest TonyC

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Hi all,

Is there a requirement to undertake an audibility test under BS5389 apart from service & inspection by a specialist contractor?

Weekly fire alarm test & check of audibility in areas are carried out in-hose.


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The service visit only need test a sounder operates at all:

"k) All fire alarm devices should be checked for correct operation. It should be confirmed that visual fire alarm devices are not obstructed from view and that their lenses are clean.
NOTE 9 This test is intended to ensure that every fire alarm device operates in response to a fire alarm signal. It is not intended that sound pressure level measurements are made."

This extract explains the relation of the weekly test to sounders:
"The following recommendations are applicable.
a) Every week, a manual call point should be operated during normal working hours. It should be confirmed that the control equipment is capable of processing a fire alarm signal and providing an output to fire alarm sounders, and to ensure that the fire alarm signal is correctly received at any ARC to which fire alarm signals are transmitted. It is not necessary to confirm that all fire alarm sounder circuits operate correctly at the time of this test.
NOTE 2 It is essential that any ARC is contacted immediately before, and immediately after, the weekly test to ensure that unwanted alarms are avoided and that fire alarm signals are correctly received at the ARC.
NOTE 3 The user needs to take account of the manufacturer’s recommendations, particularly when battery powered devices are being tested, e.g. within radio-linked fire detection and fire alarm systems.

b) The weekly test should be carried out at approximately the same time each week; occupants should then be instructed that they should report any instance of poor audibility of the fire alarm signal. In systems with staged alarms incorporating an “Alert” and an “Evacuate” signal, the two signals should be operated, where practicable, sequentially in the order they would occur at the time of a fire (i.e. “Alert” and then “Evacuate”).
c) In premises in which some employees only work during hours other than that at which the fire detection and fire alarm system is normally tested, an additional test(s) should be carried out at least once a month to ensure familiarity of these employees with the fire alarm signal(s)."

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