AS 7240.12:2018 pdf free.Fire detection and alarm systems Part 12: Line type smoke detectors using a transmitted optical beam (ISO 7 240-12:2014, MOD).
4 Requirements
4.1 Compliance
In order to comply with this part of ISO 7240, the detector shall meet the following requirements.
a) Clause 4. which shall be verified by visual inspection or engineering assessment, shall be tested in accordance with Clause 5 and shall meet the requirements of the tests.
b) Qauses 7 and , which shall be verified by visual inspection.
4.2 Individual alarm Indication
4.2.1 Each detector shall be provided with an integral red visual indicator by which the individual detector releasing an alarm can be identified, until the alarm condition is reset. Where other conditions of the detector can be visually indicated, these shall be clearly distinguishable from the alarm indication. except when the detector is switched into a service mode. For detachable detectors, the indicator may be integral with the base or the detector head.
4.2.2 The visual indicator shall be visible from a distance of 6 m in an ambient light intensity up to
500 lx at an angle up to
a) 50 from the vertical axis of the detector when viewed from beneath the detector in any direction and b) 450 from the vertical axis of the detector when viewed from beneath the detector in at least
one direction.
4.3 Connection of ancillary devices
The detector may provide for connections to ancillary devices (remote indicators, control relays, etc.), but open- or short-circuit failures of these connections shall not prevent the correct operation of the detector.
4.4 Monitoring of detachable detectors and connections
4.4.1 For detachable detectors, a means shall be provided for a remote monitoring system (e.g. the control and indicating equipment) to detect the removal of the head from the base, in order to give a fault signal.
4.4.2 If there are cables connecting separate parts of the detector, then a means shall be provided for a remote monitoring system (e.g. the fire detection control and indicating equipment) to detect a short or open circuit on those cables, in order to give a fault signal.
4.4.3 If more than one detector can be connected to the transmission path of a remote monitoring system (e.g. control and indicating equipment), the removal of a head from the base shall not prevent an alarm signal from another detector connected to the same transmission path.
4.5 Manufacturer’s adjustments
It shall not be possible to change the manufacturer’s settings except by special means (e.g. the use of a special code or tool) or by breaking or removing a seal.
4.6 On-site adjustment of response threshold value.AS 7240.12 pdf download.