ISO 12239:2021 pdf download – Smoke alarms using scattered light, transmitted light or ionization

02-16-2022 comment

ISO 12239:2021 pdf download – Smoke alarms using scattered light, transmitted light or ionization.
1 Scope This document specifies requirements, test methods, performance criteria and manufacturers’ instructions for smoke alarms that operate using scattered light, transmitted light or ionization, and are intended for household or similar residential applications. For the testing of other types of smoke alarms, or smoke alarms working on different principles, this document is recommended only as guidance. Smoke alarms with special characteristics and developed for specific risks are not covered by this document. This document allows, although it does not require, the inclusion within the smoke alarm of facilities for the following: — visual fault condition indication; — extended temperature-range operation; — interconnection with other similar smoke alarms or accessories; — temporary disablement; — alarm silencing; — signal frequency characteristics; — standby power source low condition silence; — smoke alarms with voice; — smoke alarms using radio frequency links; — response to slowly developing fires (drift compensation). Where such facilities are included, this document specifies applicable requirements. This document does not cover devices intended for incorporation in systems using separate control and indicating equipment. Such systems are specified in the ISO 7240 series.
3.3 alarm-silence facility means of temporarily silencing or desensitizing a smoke alarm after smoke has been detected 3.4 connectable device device not conforming to this document, the operation of which will not jeopardize the performance of the connected smoke alarm(s) 3.5 audible alarm signal audible signal intended to indicate an alarm condition 3.6 battery-low condition combination of battery voltage and series resistance which results in a fault warning 3.7 combination smoke alarm smoke alarm incorporating within one mechanical housing more than one fire sensor, with each sensor independently signalling a fire alarm condition, e.g. ionization and photoelectric 3.8 detachable smoke alarm smoke alarm which consists of two components, the head and the base, and which allows them to be separated from each other for maintenance without damaging any of the components 3.9 fault condition condition in which the smoke alarm is affected by an adverse condition of a component 3.10 fault warning audible signal specified by the manufacturer as indicating the existence of an actual or incipient fault that may prevent an alarm condition 3.11 free-field? conditions conditions where there are a minimal number of sound wave or radio frequency wave reflecting or absorbing surfaces

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