BS ISO 7240-15:2014 pdf free
BS ISO 7240-15:2014 pdf free.Fire detection and alarm systems一Point-type fire detectors using smoke and heat sensors
If there is provision for on-site adjustment of the response value of the detector, then
a) for all of the settings at which the manufacturer claims compliance, the detector shall comply with the requirements of this part of ISO 7240, and access to the adjustment means shall be possible only by the use of a code or special tool or by removing the detector from its base or mounting, and
b) any setting or settings at which the manufacturer does not claim compliance with this part of ISO 7240 shall be accessible only by the use of a code or special tool, and it shall be clearly marked on the detector or in the associated data that if these setting or settings are used, the detector does not comply with this part of ISO 7240.
Where means are provided (remotely or internally) to switch off signals from a sensing element or to change the sensitivity of the detector so that it no longer meets the requirements of this part of ISO 7240, this change in status shall be made available to the FDCIE.
The detector shall be so designed that a sphere of diameter larger than (1,3±0,05) mm cannot pass into the smoke measuring chamber.
NOTE This requirement is intended to restrict the access of insects into the smoke measuring chamber of the detector. It is known that this requirement is not sufficient to prevent the access of all insects, however, it is considered that extreme restrictions on the size of access holes can introduce the danger of clogging by dust, etc.It might therefore be necessary to take other precautions against false alarms due to the entry of small insects.
For detectors that do not have physical protection against ingress of foreign bodies, the resistance of the detector against the adverse effect of such ingress shall be proven by the manufacturer.BS ISO 7240-15 pdf download.
