BS/EN 54-3-2014 pdf download.Fire detection and fire alarm systems Part 3 : Fire alarm devices – Sounders.
5.1.2 Operating conditions for tests
If a test method requires a specimen to be sounding. then the specimen shall be connected to suitable power supply equipment as specified in the data provided by the manufacturer. Where, in order to be sounding, a specimen also requires the application of a contrd signal or signals, this shall be provided in accordance with the manufacturer’s specification.
If a test method requires a specimen to be in the quiescent state, then the specimen shall not be supplied with power unless it is a sounder of the types which have electronic circuits for analysing control signals and triggering the sound operation, in which case the specimen shall be connected to suitable power supply and control equipment as specified by the manufacturer and the control signals shall be arranged so that the specimen is in a non-sounding state.
Unless otherwise specified in the test procedure, the supply parameters applied to the specimen shall be set within the manufacturer’s specified range(s) and shall remain constant throughout the tests. The value chosen for each parameter shall be the nominal value, or the mean of the specified range.
When testing radio-linked sounders, an external power supply set to either the lowest or highest working voltage of the internal batteries may be used in place of the normal internal batteries on radio devices. This external power supply should be such that the maximum current is taken by the alarm device during the test.
If the manufacturer has declared different sound pressure levels for operation under different conditions, then, unless otherwise specified in the test procedure, the tests shall be conducted under one selected mode of operation only. Selection of the mode of operation shall be made with the aim to use that which consumes the most power. This will normally be the most continuous or the loudest mode.
NOTE All modes of operation and all voftages are tested in 5.3.
5.1.3 Mounting arrangements
Unless otherwise specified, the specimen shall be mounted by its normal means of attachment in accordance with the manufacturer’s instructions on a flat rigid backing board. If these instructions describe more than one method of mounting then the method considered to be most unfavourable shall be chosen for each test.
The detailed mounting arrangements are given in Annex A or Annex B for the different sound pressure level
tests used.
5.1.4 Tolerances
The tolerances for the environmental test parameters shall be given in the basic reference standards for the test (e.g. the relevant parts of EN 60068).
If a specific tolerance or deviation limit is not specified in a requirement or test procedure, then a deviation limit of ± 5 % shall be applied.
a) eight specimens of type A or 10 specimens of type B sounder with any mounting, bases, boxes or accessories etc.;
b) any equipment, such as control and indicating equipment, as may be necessary for the correct operation of the device in accordance with the manufacturer’s specification;
c) the data required in Clause 8.
The specimens submitted shall be deemed representative of the manufacturer’s normal production with regard to their construction and settings.
The details of the power supply equipment used and/or the equipment used for generating the control signal(s) should be given in the test report.
5,1.6 Test schedule
The specimens shall be tested and inspected according to the schedule given In Table 2.
All the specimens shall be first submitted to the reproducibility test described in 5.1.7. On completion of the reproducibility test, the specimen with the least loud sound pressure level shall be numbered 1 and the rest arbitrarily numbered from 2 to 8 for type A or 2 to 10 for type B.
Unless otherwise required by the test procedure, the mode of operation selected for conducting the reproducibility test shall be used for the other tests.
Where, after one of the test specified in 5.2.1 to 5.4.5.1 the sound pressure level of the specimen differs from that measured during the reproducibility test by more than 6 dO, a new specimen shall be used for the next test on the schedule for that specimen. The sound pressure level shall be first measured as specified in 5.1.7.
The tests on an individual specimen may be carried out in any order except that the reproducibility test (5.1.7) shall be performed first on all specimens and the tests on specimens 1 and 2 shall be carried out in the order listed in Table 2, except for the enclosure protection test (5.2.4) which shall be carried out last.BS/EN 54-3-2014 pdf download.