1、PUBLICLY AVAILABLE SPECIFICATION PAS 41:2003 Directional Sounders Requirements and tests ICS 13.200; 13.320 PAS 41:2003 This Publicly Available Specification comes into effect on 17 February 2003 BSI 17 February 2003 ISBN 0 580 41191 5 Amendments issued since publication Amd. No. Date CommentsPAS 41
2、:2003 BSI 17 February 2003 i Contents Page Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s a n d d e f i n i t i o n s 1 4 Requirements 2 5T e s t s 3 Annex A (normative) Sound level test and frequency test for sounders 7 Annex B (normative) Directional test for sounders 8 Bibliography
3、13 Figure B.1 Recommended speaker / subject positioning 9 Figure B.2 Sample record diagram 11 Figure B.3 Sample record diagram showing five test runs 12 Table 1 Schedule of tests 4 Table A.1 Test report for 1/3 octave measurements in horizontal plane 7 Table A.2 Test report for 1/3 octave measuremen
4、ts in vertical plane 8 Table B.1 Age bandings and example quantities 10PAS 41:2003 ii BSI 17 February 2003 Foreword This Publicly Available Specification, PAS 41, has been published to provide an interim specification for companies designing and employing directional sounders as part of an emergency
5、 evacuation system within a building, ship or structure. The Publicly Available Specification is based upon BS EN 54-3:2001, Fire detection and alarm systems Part 3: Fire alarm devices Sounders. Specific technical requirements for directional sounders have been developed through research and consult
6、ation with a balanced group of interested organizations. In preparing this Publicly Available Specification, consideration was given to the constructional requirements of directional sounders and, importantly for this type of sounder, the qualitative assessment of a test subjects ability to locate t
7、he sound source accurately. Consequently, performance requirements have been developed that could take account of possible configurations without imposing undue restriction on the design freedom. This Publicly Available Specification is not to be regarded as a British Standard. It will be withdrawn
8、upon publication of its content in, or as, a British Standard. Acknowledgement is given to the following organizations who were consulted in the development of this specification: British Fire Protection Systems Association; Industry Committee for Emergency Lighting (ICEL); University of Leeds; The
9、Home Office; International Maritime Organization; Maritime type B, outdoor use; Class I, open space use; Class II, corridor use. This Publicly Available Specification is not intended to cover: fire alarm sounders; non-directional audible evacuation signals covered by the scope of ISO 8201:1987; supe
10、rvisory sounders, for example, within the control and indicating equipment. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
11、nced document (including any amendments) applies. BS EN 54-3:2001, Fire detection and fire alarm systems Part 3: Fire alarm devices Sounders. IEC 60651:1979, Specifications for sound level meters. IEC 61260:1995, Octave and fractional octave band filters. 3 Terms and definitions For the purposes of
12、this Publicly Available Specification, the terms and definitions given in BS EN 54-3:2001 and the following apply. 3.1 directional sounder audible device which, as part of an emergency evacuation system in a building, ship, structure, premises or location, guides a person, or persons, from an unsafe
13、 area to a safe area 3.2 type A device audible directional sounder designed for indoor use 3.3 type B device audible directional sounder designed for outdoor use 3.4 Class I device audible directional sounder designed for open space use (subject to type A or type B) 3.5 Class II device audible direc
14、tional sounder designed for corridor use (subject to type A or type B)PAS 41:2003 2 BSI 17 February 2003 3.6 directional sounder system system comprised of one or more stand-alone or linked directional sounders for the purposes of identifying an escape route under emergency situations 3.7 supervisor
15、y sounder audible device, usually mounted within a piece of equipment (e.g. control and indicating equipment), used for drawing attention, locally, to a change in status or the presence of an abnormal condition indicated by that equipment BS EN 54-3:2001 3.8 sound pattern(s) temporal arrangement of
16、the bursts or pulses of sound output from the device 4 Requirements 4.1 Conformity In order to conform to this Publicly Available Specification, directional sounders shall meet the requirements of this clause which shall be verified by visual inspection or engineering assessment, shall be tested in
17、accordance with, and shall meet the requirements of Clause 5. 4.2 Sound level The directional sounder shall conform to the requirements of BS EN 54-3:2001, 4.2. 4.3 Sound patterns The directional sounder shall conform to the requirements of BS EN 54-3:2001, 4.3 except that only the sound pattern(s)
18、shall be declared. 4.4 Durability The directional sounder shall conform to the requirements of BS EN 54-3:2001, 4.4. 4.5 Construction The directional sounder shall conform to the requirements of BS EN 54-3:2001, 4.5. 4.6 Marking and data 4.6.1 Marking Each directional sounder shall be clearly marked
19、 with the following information: a) words “Directional Sounder”; b) number and date of this Publicly Available Specification, i.e. PAS 41:2003 1) ; c) environment type, i.e. type A or B (see 3.2 and 3.3); d) name or trademark of the manufacturer or supplier; e) manufacturer or supplier model designa
20、tion (type or number); f) terminal designations; g) rated supply voltages or voltage ranges (a.c. or d.c.); h) power consumption; i) a mark(s) or code(s) for example, serial number or batch code, by which the manufacturer can identify, at least, the date or batch and place of manufacture and the ver
21、sion number(s) of any software contained within the device. 1) Marking PAS 41:2003 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim
22、is solely the claimants responsibility. Such a declaration is not to be confused with third-party certification, which may also be desirable.PAS 41:2003 BSI 17 February 2003 3 Where any marking on the device uses symbols or abbreviations not in common use then these shall be explained in the data su
23、pplied with the device. The marking shall be visible during installation and shall be accessible during maintenance. NOTE The marking might not be visible when the device is installed and ready for use. The markings shall not be placed on screws or easily removable parts. 4.6.2 Data The information
24、required in BS EN 54-3:2001, 4.6.2a) to f), shall be supplied with the device, or shall be given in a data sheet or technical manual identified on, or with each device, except for 4.6.2d) where only the sound pattern(s) shall be identified. 5 Tests 5.1 General Unless otherwise stated in any of the t
25、est procedures listed in 5.2 to 5.18, all testing shall be carried out in the atmospheric and operating conditions defined in BS EN 54-3:2001, 5.1.1 and 5.1.2 respectively. Unless otherwise specified, the directional sounder shall be mounted in accordance with BS EN 54-3:2001, 5.1.3. Tolerances shal
26、l be as specified in BS EN 54-3:2001, 5.1.4. The manufacturer shall supply directional sounders, equipment necessary for operation and data in accordance with BS EN 54-3:2001, 5.1.5. Thirty-six sounders are required to complete the performance test given in 5.4. Only 18 of these need be operational
27、units as long as the remaining 18 look identical from the subject position. The operational directional sounders shall be tested and inspected in accordance with the schedule given in Table 1. All the specimens shall first be submitted to the reproducibility test (5.2). On completion of the reproduc
28、ibility test, the specimen with the lowest sound level shall be numbered 1 and a selection of the rest randomly numbered from 2 to 8 for Type A, or 2 to 10 for Type B. Unless otherwise required by any of the test procedures, the mode of operation selected for conducting the reproducibility test shal
29、l be used for the other tests.PAS 41:2003 4 BSI 17 February 2003 Table 1 Schedule of tests Test Subclause Specimen No.(s) Type A Type B Reproducibility 5.2 all all Operational performance, level and frequency 5.3 1 Operational performance, localization 5.4 all all Durability 5.5 22 Dry heat (operati
30、onal) 5.6 33 Dry heat (endurance) 5.7 9 Cold (operational) 5.8 33 Damp heat, cyclic (operational) 5.9 33 Damp heat, steady state (endurance) 5.10 33 Damp heat, cyclic (endurance) 5.11 1 0 SO 2corrosion (endurance) 5.12 44 Shock (operational) 5.13 55 Impact (operational) 5.14 66 Vibration (operationa
31、l) 5.15 77 Vibration (endurance) 5.16 77 Electrostatic discharge (operational) 5.17 88 Radiated electromagnetic fields (operational) 5.17 88 Conducted disturbances induced by electromagnetic fields (operational) 5.17 88 Voltage transients, fast transient bursts (operational) 5.17 88 Voltage transien
32、ts, slow high energy voltage surge (operational) 5.17 88 Enclosure protection 5.18 1, 2 1, 2 Where after one of the tests specified in 5.6 to 5.17 the A-weighted sound level of the specimen being tested differs from that measured during the reproducibility test by more than 6 dB, a new specimen shal
33、l be used for the next test on the schedule for that specimen. The sound level shall first be measured as specified in 5.2. The EMC tests specified in 5.17 are not required for sounders that do not rely on active electronic components for their operation. The tests on an individual specimen may be c
34、arried out in any order except that the reproducibility test (5.2) and the operational performance, localization (5.4) shall be performed first on specimens as detailed and the tests on specimens 1 and 2 shall be carried out in the order listed, i.e. 5.18 last.PAS 41:2003 BSI 17 February 2003 5 5.2
35、Reproducibility All directional sounders shall be subjected to the reproducibility test described in BS EN 54-3:2001, 5.2. 5.3 Operational performance, level and frequency The sound level of the specimen shall be measured in free field conditions in accordance with Annex A with the supply parameters
36、 at the maximum and minimum of the specified range(s) (see 4.6.2). If the manufacturer has declared different operating modes (see 4.6.2) then the sound level and frequency shall be measured under each mode. The sounder shall be deemed to conform to the requirements of this subclause if, for each mo
37、de of operation: a) the A-weighted sound level is greater than 65 dB in at least one direction; b) the A-weighted sound level does not exceed 120 dB in any direction; c) the sound level measured at each of the specified angles is not less than that declared by the manufacturer (see 4.6.2); d) the di
38、fference between the A-weighted sound levels measured at the maximum and minimum supply parameters is not more than 6 dB, for each direction measured. Subject to the difference parameter ( L) recorded in Table A.1 or Table A.2 the sounder shall be marked as follows (subject to satisfying 5.4 to 5.18
39、): a) if L 20 dBA then the sounder shall be marked “Class I”; b) if 21 dBA L 30 dBA then the sounder shall be marked “Class II”; c) if 31 dBA L then the sounder shall not be marked “directional” and shall not be tested in accordance with 5.4 to 5.18 and therefore cannot be used as a directional soun
40、der or as part of a directional sounder system. The difference parameter shall be calculated in accordance with the following formula: L = L 1 L where L 1is the reading at 90 L is the average of the readings at 15 or 165 calculated in accordance with the following formula: L= (L 2+ L 3 )/2 where L 2
41、is the 10 KHz reading at 15 L 3is the 10 KHz reading at 165 . NOTE If there is a difference between the vertical and horizontal L then the sounder needs to be clearly marked with which orientation is critical for the Class I or Class II operation. 5.4 Operational performance, localization When the d
42、irectional sounder is tested in accordance with Annex B, the test subjects (as a group overall) shall correctly identify the location of the sounder at least 75 % of the time for each mode of operation. If the directional sounder fails to meet this requirement, it shall not be tested in accordance w
43、ith 5.4 to 5.18 and shall not be marked “directional” and therefore cannot be used as a directional sounder or as part of a directional sounder system. 5.5 Durability The change in sound level after prolonged operation of the directional sounder shall be tested in accordance with BS EN 54-3:2001, 5.
44、4.2 and shall conform to the requirements of BS EN 54-3:2001, 5.4.3. 5.6 Dry heat (operational) The ability of the directional sounder to function correctly at high ambient temperatures shall be tested in accordance with BS EN 54-3:2001, 5.5.2 and shall conform to the requirements of BS EN 54-3:2001
45、, 5.5.3.PAS 41:2003 6 BSI 17 February 2003 5.7 Dry heat (endurance) The ability of the directional sounder to withstand long-term ageing effects shall be tested in accordance with BS EN 54-3:2001, 5.6.2 and shall conform to the requirements of BS EN 54-3:2001, 5.6.3. 5.8 Cold (operational) The abili
46、ty of the directional sounder to function correctly at low ambient temperatures shall be tested in accordance with BS EN 54-3:2001, 5.7.2 and shall conform to the requirements of BS EN 54-3:2001, 5.7.3. 5.9 Damp heat, cyclic (operational) The ability of the directional sounder to withstand an enviro
47、nment with high relative humidity shall be tested in accordance with BS EN 54-3:2001, 5.8.2 and shall conform to the requirements of BS EN 54-3:2001, 5.8.3. 5.10 Damp heat, steady state (endurance) The ability of the directional sounder to withstand the long-term effects of humidity in the service e
48、nvironment shall be tested in accordance with BS EN 54-3:2001, 5.9.2 and shall conform to the requirements of BS EN 54-3:2001, 5.9.3. 5.11 Damp heat, cyclic (endurance) The ability of the directional sounder to withstand the longer-term effects of high humidity and condensation shall be tested in ac
49、cordance with BS EN 54-3:2001, 5.10.2 and shall conform to the requirements of BS EN 54-3:2001, 5.10.3. 5.12 Sulfur dioxide (SO 2 ) corrosion (endurance) The ability of the directional sounder to withstand the corrosive effect of sulfur dioxide as an atmospheric pollutant shall be tested in accordance with BS EN 54-3:2001, 5.11.2 and shall conform to the requirements of BS EN 54-3:2001, 5.11.3. 5.13 Shock (operational) The ability of the
