ISO 7240-3:2020,Fire detection and alarm systems — Part 3: Audible alarm devices.
This pdf file is shared by a man named Larry from England.Thanks.
ISO 7240-3:2020 specifies fire alarm audible alarm devices for two types of application environment, type A for indoor use and type B for outdoor use.
In order to comply with the provisions of this document, an AAD shall meet the requirements ofthis clause which shall be verified by visual inspection or engineering assessment, shall be tested asdescribed in Clause 5 and shall meet the requirements of the tests.
This document requires that the manufacturer declare sound pressure levels in the data required by 8. 1.
The manufacturer may declare different sound pressure levels for operation under different conditions,e.g. when operating on different voltage ranges or with different sound patterns. If this is the case, the sound pressure level of each specimen shall be measured under each mode of operation (see 5.3).
When tested in accordance with 5.3, the AAD shall produce A-weighted sound pressure levels of notless than 65 dB in one direction and the sound pressure level measured at each of the specified angles shall not be less than that declared by the manufacturer.
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