1、 ISO 2016 Fire detection and fire alarm systems Part 24: Fire alarm loudspeakers Systmes de dtection dincendie et dalarme Partie 24: Haut-parleurs pour systmes dalarme vocale INTERNATIONAL STANDARD ISO 7240-24 Second edition 2016-04-15 Reference number ISO 7240-24:2016(E) ISO 7240-24:2016(E)ii ISO 2
2、016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on th
3、e internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749
4、 09 47 copyrightiso.org www.iso.org ISO 7240-24:2016(E)Foreword v Introduction vii 1 Scope . 1 2 Normative references 1 3 Terms, definitions, symbols and abbreviated terms . 2 3.1 Terms and definitions . 2 3.2 Abbreviated terms . 4 4 Requirements 4 4.1 Compliance . 4 4.2 Frequency response limits 5
5、4.3 Durability . 5 4.4 Construction 5 4.4.1 Provision for external conductors 5 4.4.2 Materials . 6 4.4.3 Ingress protection . 6 4.4.4 Access 6 5 Tests . 6 5.1 General . 6 5.1.1 Atmospheric conditions for tests. 6 5.1.2 Operating conditions for tests 6 5.1.3 Mounting arrangements 7 5.1.4 Tolerances
6、7 5.1.5 Frequency response measurement and sensitivity calculation 7 5.1.6 Frequency response measurement and sensitivity calculation for loudspeakers requiring dedicated system equalization 8 5.1.7 Provision for tests . 8 5.1.8 Test schedule . 9 5.2 Reproducibility 10 5.2.1 Object of the test .10 5
7、.2.2 Test procedure 10 5.2.3 Requirements 10 5.3 Rated impedance 10 5.3.1 Object of the test .10 5.3.2 Test procedure 10 5.3.3 Requirements 11 5.4 Horizontal and vertical coverage angles 11 5.4.1 Object of the test .11 5.4.2 Test procedure 11 5.4.3 Requirements 12 5.5 Maximum sound pressure level 12
8、 5.5.1 Object of the test .12 5.5.2 Test procedure 12 5.5.3 Requirements 13 5.6 Rated noise power (durability) .13 5.6.1 Object of the test .13 5.6.2 Test procedure 13 5.6.3 Requirements 13 5.7 Dry heat (operational) .14 5.7.1 Object of the test .14 5.7.2 Test procedure 14 5.7.3 Requirements 14 5.8
9、Dry heat (endurance) .14 ISO 2016 All rights reserved iii Contents Page ISO 7240-24:2016(E)5.8.1 Object of the test .14 5.8.2 Test procedure 15 5.8.3 Requirements 15 5.9 Cold (operational) .15 5.9.1 Object of the test .15 5.9.2 Test procedure 15 5.9.3 Requirements 16 5.10 Damp heat, cyclic (operatio
10、nal) 16 5.10.1 Object of the test .16 5.10.2 Test procedure 16 5.10.3 Requirements 17 5.11 Damp heat, steady-state (endurance) 17 5.11.1 Object of the test .17 5.11.2 Test procedure 17 5.11.3 Requirements 18 5.12 Damp heat, cyclic (endurance) .18 5.12.1 Object of the test .18 5.12.2 Test procedure 1
11、8 5.12.3 Requirements 18 5.13 Sulfur dioxide (SO 2 ) corrosion (endurance) 18 5.13.1 Object of the test .18 5.13.2 Test procedure 19 5.13.3 Requirements 19 5.14 Shock (operational) .19 5.14.1 Object of the test .19 5.14.2 Test procedure 19 5.14.3 Requirements 20 5.15 Impact (operational) .20 5.15.1
12、Object of the test .20 5.15.2 Test procedure 20 5.15.3 Requirements 21 5.16 Vibration, sinusoidal (operational) 21 5.16.1 Object of the test .21 5.16.2 Test procedure 21 5.16.3 Requirements 22 5.17 Vibration, sinusoidal (endurance) 22 5.17.1 Object of the test .22 5.17.2 Test procedure 23 5.17.3 Req
13、uirements 23 5.18 Ingress protection .24 5.18.1 Object of the test .24 5.18.2 Enclosure of the loudspeaker 24 5.18.3 Test procedure 24 5.18.4 Requirements 25 6 Test report 25 7 Marking .25 8 Data .26 Annex A (normative) Acoustical measurements .27 Annex B (normative) Measuring rated noise power (dur
14、ability) .32 Annex C (informative) Loudspeaker physical references 37 Bibliography .39 iv ISO 2016 All rights reserved ISO 7240-24:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepari
15、ng International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in lia
16、ison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Di
17、rectives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that
18、 some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent dec
19、larations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as informatio
20、n about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 3, Fire detection and alarm sys
21、tems. This second edition cancels and replaces the first edition (ISO 7240-24:2010), of which it constitutes a minor revision. It also incorporates the Amendment ISO 7240-24:2010/Amd, 1:2013. ISO 7240 consists of the following parts, under the general title Fire detection and fire alarm systems: Par
22、t 1: General and definitions Part 2: Control and indicating equipment Part 3: Audible alarm devices Part 4: Power supply equipment Part 5: Point-type heat detectors Part 6: Carbon monoxide fire detectors using electro-chemical cells Part 7: Point-type smoke detectors using scattered light, transmitt
23、ed light or ionization Part 8: Point-type fire detectors using a carbon monoxide sensor in combination with a heat sensor Part 9: Test fires for fire detectors Technical Specification Part 10: Point-type flame detectors Part 11: Manual call points Part 12: Line type smoke detectors using a transmitt
24、ed optical beam Part 13: Compatibility assessment of system components ISO 2016 All rights reserved v ISO 7240-24:2016(E) Part 14: Design, installation, commissioning and service of fire detection and fire alarm systems in and around buildings Part 15: Point-type fire detectors using smoke and heat
25、sensors Part 16: Sound system control and indicating equipment Part 17: Short-circuit isolators Part 18: Input/output devices Part 19: Design, installation, commissioning and service of sound systems for emergency purposes Part 20: Aspirating smoke detectors Part 21: Routing equipment Part 22: Smoke
26、-detection equipment for ducts Part 23: Visual alarm devices Part 24: Fire alarm loudspeakers Part 25: Components using radio transmission paths Part 27: Point-type fire detectors using a scattered-light, transmitted-light or ionization smoke sensor, an electrochemical-cell carbon-monoxide sensor an
27、d a heat sensor Part 28: Fire protection control equipment The following part is under preparation: Part 29: Video fire detectorsvi ISO 2016 All rights reserved ISO 7240-24:2016(E) Introduction The purpose of a fire alarm loudspeaker as a component of a fire alarm system (see ISO 7240-19) is to prov
28、ide intelligible warning to people in or within the vicinity of a building in which a fire emergency has occurred and to enable such person(s) to take appropriate measures in accordance with a predetermined evacuation plan. The primary reason for using a fire alarm system, instead of coded warnings
29、given by aural alarm indicators (see ISO 7240-3), is to reduce the time taken for those at risk to recognize that an emergency exists and to give clear instructions about what to do next. This means that fire alarm loudspeakers are required to achieve a minimum acoustical performance, as well as con
30、structional and environmental requirements, to be suitable for use in a fire alarm system. This part of ISO 7240 recognizes that the exact nature of the acoustical requirements for fire alarm loudspeakers varies according to the nature of the space into which they are installed. It therefore specifi
31、es the minimum requirements that apply to fire alarm loudspeakers and a common method for testing their operational performance against parameters specified by the manufacturers. This part of ISO 7240 gives common requirements for the construction and robustness of fire alarm loudspeakers as well as
32、 their performance under climatic and mechanical conditions that are likely to occur in the service environment. As the types of loudspeaker considered in this part of ISO 7240 are passive electromechanical devices not involving sensitive electronic circuits, electromagnetic compatibility (EMC) test
33、s have not been included. The loudspeakers have been classified for either an indoor or an outdoor application environment category. This part of ISO 7240 requires that manufacturers specify certain characteristics in a consistent manner so that designers can make objective decisions about which lou
34、dspeaker to use in specific applications. ISO 2016 All rights reserved vii Fire detection and fire alarm systems Part 24: Fire alarm loudspeakers 1 Scope This part of ISO 7240 specifies requirements, test methods and performance criteria for loudspeakers intended to broadcast a warning of fire betwe
35、en a fire detection and alarm system and the occupants of a building (see ISO 7240-1:2014, Figure 1, item C). This part of ISO 7240 specifies loudspeakers for two types of application environment: type A, generally for indoor use, and type B, generally for outdoor use. This part of ISO 7240 does not
36、 cover loudspeakers for special applications, for example, loudspeakers for use in hazardous applications, if such applications require additional or other requirements or tests other than those given in this part of ISO 7240. This part of ISO 7240 is not intended to cover addressable loudspeakers o
37、r loudspeakers with active components. Audible alarm indicators are covered in ISO 7240-3. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies.
38、 For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7240-1, Fire detection and alarm systems Part 1: General and definitions IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-1, Environmental testing Part 2-1: Tests
39、 Test A: Cold IEC 60068-2-2, Environmental testing Part 2-2: Tests Test B: Dry heat IEC 60068-2-6, Environmental testing Part 2-6: Tests Test Fc: Vibration (sinusoidal) IEC 60068-2-27, Environmental testing Part 2-27: Tests Test Ea and guidance: Shock IEC 60068-2-30, Environmental testing Part 2-30:
40、 Tests Test Db: Damp heat, cyclic (12 h + 12 h cycle) IEC 60068-2-42, Environmental testing Part 2-42: Tests Test Kc: Sulphur dioxide test for contacts and connections IEC 60068-2-75, Environmental testing Part 2-75: Tests Test Eh: Hammer tests IEC 60068-2-78, Environmental testing Part 2-78: Tests
41、Test Cab: Damp heat, steady state IEC 60268-1, Sound system equipment Part 1: General IEC 60529:1989, Degrees of protection provided by enclosures (IP code) IEC 60695-11-10, Fire hazard testing Part 11-10: Test flames 50 W horizontal and vertical flame test methods INTERNATIONAL ST ANDARD ISO 7240-2
42、4:2016(E) ISO 2016 All rights reserved 1 ISO 7240-24:2016(E) IEC 60695-11-20, Fire hazard testing Part 11-20: Test flames 500 W flame test methods IEC 61260, Electroacoustics Octave-band and fractional-octave-band filters IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications 3 Term
43、s, definitions, symbols and abbreviated terms For the purposes of this document, the terms, definitions and symbols given in ISO 7240-1 and the following apply. 3.1 Terms and definitions 3.1.1 1/3 octave frequency band as defined in IEC 61260 3.1.2 coverage angle smallest angle between two direction
44、s on either side of the reference axis at which the sound pressure level is 6 dB less than the sound pressure level on the reference axis Note 1 to entry: This angle is measured in the vertical and horizontal planes. 3.1.3 free-field condition acoustical environment in which the sound pressure decre
45、ases with the distance, r, from a point source according to a 1/r law, with an accuracy of 10 %, in the region that is occupied by the sound field between the loudspeaker system and the microphone during the measurements EXAMPLE An anechoic room, a quiet outdoor space. 3.1.4 frequency response sound
46、 pressure level at a distance of 4 m from the reference point on the reference axis, produced at 1/3 octave frequency bands, from 100 Hz to 10 kHz (centre frequencies) Note 1 to entry: This is also referred to as magnitude or amplitude response. 3.1.5 ground plane measurement measurement under half-
47、space free-field conditions used to simulate a free-field condition in which the loudspeaker is mounted above an acoustically totally reflective boundary surface and aimed so that its reference axis points towards a measurement microphone that is placed directly on the boundary surface Note 1 to ent
48、ry: In order to achieve measurement results that are comparable with a free-field condition, ground- plane measurements need to be corrected by 6 dB at all frequencies. 3.1.6 half-space free-field condition acoustical environment that is confined by a plane of sufficient size and in which the free-f
49、ield exists in a hemisphere, so that the sound pressure from a point source mounted in the surface of that plane decreases in the manner defined in the free-field condition EXAMPLE A half-space anechoic room. 3.1.7 horizontal plane virtual plane of the loudspeaker containing the reference axis, as specified by the manufacturer Note 1 to entry: There may be several horizontal planes corresponding to several reference axes.2 ISO 2016 Al
