AS ISO 7240.25:2015 pdf free

AS ISO 7240.25:2015 pdf free.Fire detection and fire alarm systems Part 25: Components using radio transmission paths
Where calculation is not practical, the mean consumption shall be measured at nominal voltage for at least 1 h under quiescent operation after the stabilization period specified by the manufacturer. The verification of this calculation shall be made as defined in 8.3.3. Annex C gives an example for the calculation of the service life of the autonomous power source.
All components powered by an autonomous power source shall be able to transmit a fault signal (low power) before the power source fails. The following conditions shall be taken into account (see 8.3.4).
a) The component shall be capable of generating and transmitting a fault signal within 60 min after replacing a good or new autonomous power source by a preconditioned power source representing a discharged power source at the end of its service life.
b) The component shall be capable of operating as intended when it is activated using the preconditioned power source representing a discharged power source at the end of its service life.
c) The component shall keep the fire alarm condition and/or another activated condition for at least 30 min (where alarm condition is not applicable).
The loss of the power source shall be indicated as a fault signal from point in accordance with ISO 7240-2. Where several power sources are used for different functions within one component, the fault signal shall be given for each power source (see 5.3.3).
Either the component shall be designed to make polarity reversal impossible or, if not, the polarity of the connections for the power source shall be identifiable and the polarity reversal shall not damage the component (see 8.3.5).
The specimens submitted shall be deemed representative of the manufacturer’s normal production with regard to their construction and calibration. Where specimens are comprised of at least two parts 一a base (socket) and a head (body)一and the radio part and the power supply are located only in one of these parts,only this part shall be tested in accordance with this part of ISO 7240. The other part is used to trigger the radio part.AS ISO 7240.25 pdf free download.