BS EN 54-7:2001 pdf download

BS EN 54-7:2001 pdf download.Fire detection and fire alarm systems——Part 7: Smoke detectors— Point detectors using scattered light,transmitted light or ionization.
4,9 Marking
Each detector shall be clearly marked with the following Information:
a) the number of this standard (i.e. EN 54-7);
b) the name or trademark of the manufacturer or supplier;
C) the model designation (type or number);
d) the wiring terminal designations;
e) some mark(s) or code(s) (e.g. serial number or batch code), by which the manufacturer cart Identify, at least, the date or batch and place of manufacture, and me version number(s) of any software contained within the detector.
For detachable detectors, the detector head shall be marked with a), b), C) and e), and the base shall be marked with at least c) (i.e. its own model designation) and d).
Where any marking on the device uses symbols or abbreviations not in common use then these shall be explained In the data supplIed with the device.
The marking shall be visMle during installation of the detector and shall be accessible during maintenance The markings shall not be placed on screws or other easdy removable parts.
4.10 Data
Detectors shall either be supplied with sufficient technical, installation and maintenance data to enable their correct Installation and operation or, it all of these data are not supplied with each detector, reference to the appropnate data sheet shall be given on, or with, each detector.
NOTE: Additional information may be required by organizations certifying that detectors produced by a manufacturer conform to the requirements of this standard.
4.11 AddItional requirements for software controlled detectors
4.11.1 General
For detectors wtnch rely on software control in order to fulfil the requirements of this standard, the
requirements of 4.11.2. 4.11.3 and 4.11.4 shall be met
4.11.2 Software documentation
4.11.2.1 The manufacturer shall submit documentation which gives an overview of the software design. This documentation shall be in sufficient detail for the design to be inspected for compliance with thés standard and shall include at least the following:
a) a functional description of the main program flow (e.g. as a flow diagram or structogram) induding:
5 Tests
5.1 General
5.1.1 Atmospheric conditions for tests
Unless otherwise stated in a test procedure, the testing shall be carried out after the test specimen has been allowed to stabilize in the standard atmosphenc conditions for testing as csescnbed in
IEC 60068-1.19&8+A1:1992 as foNows:
a) temperature: (1510
b) relative humidity: (25 to 75) %;
C) air pressure: (86 to 106) kPa.
NOTE: If variations in these parameters have a significant effect on a measurement, then such vanabons should
be kept to a mininum ciring a series of measurements cried out as part of one lest on one specimen
5.1.2 Operating conditions for tests
It a test method requires a specimen to be operational, then the specimen shall be connected to suitable supply and monitoring equipment with characteristics as required by the manufacturer’s data. Unless otherwise specified in the test method, the supply parameters applied to the specimen shall be set within the manufacturers specified range(s) and shall remain substantially constant throughout the tests. The value chosen foe’ each parameter shall normally be the nominal value, or the mean of the specified range. If a test procedure requires a specimen to be monitored to detect any alarm or fault signals, then connections shall be made to any necessary ancillary devices (e.g. through winng to an end-of-line device for conventional detectors) to allow a fault signal to be recognized.
NOTE: The detads of the supply and monitoring equipment and the alarm catena used should be gwen m the test report.
5.1.3 Mounting arrangements
The specwnen shall be mounted by its normal means of attachment in accordance with the manufacturers instructIons. If these instructions describe more than one method of mounting then the method considered to be most unfavorable shall be chosen for each test.
5.1.4 Tolerances
Unless otherwise stated, the tolerances for the environmental test parameters shall be as given in the basic reference standards for the test (e.g. the relevant part of IEC 60068).
If a requirement or test procedure does not specify a tolerance or deviation lwnits, then deviation limits of ±5 % shall be applied.
5.1.5 Measurement of response threshold value
The specimen for which the response threshold value is to be measured shall be installed in the smoke tunnel, described in annex A, in its normal operating position, by its normal means of attachment. The orientation of the specimen relative to the direction of airflow shall be the least sensitive orientation, as determined in the directional dependence test, unless otherwise specified in the test procedure.
Before commencing each measurement the smoke tunnel shall be purged to ensure that the tunnel and the specimen are free from the test aerosol.
The air velocity in the proximity of the specimen shall be (0,2 ± 0.04) m during the measurement, unless otherwise specified in the test procedure.