ISO 7240-8-2014 Fire detection and alarm systems - Part 8 Point-type fire detectors using a carbon monoxide sensor in combination with a heat sensor《火灾探测和警报系统 第.pdf

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1、 ISO 2014 Fire detection and alarm systems Part 8: Point-type fire detectors using a carbon monoxide sensor in combination with a heat sensor Systmes de dtection et dalarme dincendie Partie 8: Dtecteurs ponctuels utilisant un capteur de monoxide de carbone en combinaison avec un capteur de chaleur I

2、NTERNATIONAL STANDARD ISO 7240-8 Second edition 2014-12-15 Reference number ISO 7240-8:2014(E) ISO 7240-8:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise

3、in any form or by any means, electronic or mechanical, including photocopying, or posting on the 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 Case

4、postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 7240-8:2014(E)Contents Page Foreword vi Introduction viii 1 Scope . 1 2 Normative references 1 3 Terms and definitions and abbreviated terms 2 3.1 Terms and

5、definitions . 2 3.2 Abbreviated terms . 2 4 Requirements 2 4.1 Compliance . 2 4.2 Individual alarm indication 2 4.3 Connection of ancillary devices 3 4.4 Monitoring of detachable detectors 3 4.5 Manufacturers adjustments . 3 4.6 On-site adjustment of response behaviour 3 4.7 Rate-sensitive response

6、behaviour . 3 4.8 Requirements for software-controlled detectors . 4 4.8.1 General 4 4.8.2 Software design. 4 4.8.3 The storage of programs and data 4 5 Tests . 4 5.1 General . 4 5.1.1 Atmospheric conditions for tests. 4 5.1.2 Mounting arrangements 4 5.1.3 Operating conditions for tests 5 5.1.4 Tole

7、rances 5 5.1.5 Measurement of CO response value 5 5.1.6 Measurement of heat sensor response value 6 5.1.7 Provision for tests . 6 5.1.8 Test schedule . 7 5.1.9 Test report . 7 5.2 Repeatability of CO response 7 5.2.1 Object of the test 7 5.2.2 Test procedure . 7 5.2.3 Requirements . 7 5.3 Directiona

8、l dependence of CO response . 8 5.3.1 Object of the test 8 5.3.2 Test procedure . 8 5.3.3 Requirements . 9 5.4 Directional dependence of heat response . 9 5.4.1 Object of the test 9 5.4.2 Test procedure . 9 5.4.3 Requirements . 9 5.5 Lower limit of heat sensitivity . 9 5.5.1 Object of the test 9 5.5

9、.2 Test procedure . 9 5.5.3 Requirements 10 5.6 Reproducibility of CO response .10 5.6.1 Object of the test .10 5.6.2 Test procedure 10 5.6.3 Requirements 10 ISO 2014 All rights reserved iii ISO 7240-8:2014(E)5.7 Reproducibility of heat response .10 5.7.1 Object of the test .10 5.7.2 Test procedure

10、10 5.7.3 Requirements 11 5.8 Exposure to chemical agents at environmental concentrations .11 5.8.1 Object of the test .11 5.8.2 Test procedure 11 5.8.3 Requirements 11 5.9 Long-term stability of CO response12 5.9.1 Object of the test .12 5.9.2 Test procedure 12 5.9.3 Requirements 12 5.10 Saturation

11、.12 5.10.1 Object of the test .12 5.10.2 Test procedure 13 5.10.3 Requirements 13 5.11 Exposure to chemical agents which may be present during a fire 13 5.11.1 Object of the test .13 5.11.2 Test procedure 13 5.11.3 Requirements 14 5.12 Variation in supply parameters .14 5.12.1 Object of the test .14

12、 5.12.2 Test procedure 14 5.12.3 Requirements 15 5.13 Air movement15 5.13.1 Object of the test .15 5.13.2 Test procedure 15 5.13.3 Requirements 15 5.14 Dry heat (operational) .16 5.14.1 Object of the test .16 5.14.2 Test procedure 16 5.14.3 Requirements 16 5.15 Dry heat endurance 16 5.15.1 Object 16

13、 5.15.2 Test procedure 17 5.15.3 Requirements 17 5.16 Cold (operational) .17 5.16.1 Object of the test .17 5.16.2 Test procedure 18 5.16.3 Requirements 18 5.17 Damp heat, cyclic (operational) 19 5.17.1 Object 19 5.17.2 Test procedure 19 5.17.3 Requirements 19 5.18 Damp heat, steady-state (endurance)

14、 20 5.18.1 Object of the test .20 5.18.2 Test procedure 20 5.18.3 Requirements 20 5.19 Low humidity, steady-state (endurance) .21 5.19.1 Object of the test .21 5.19.2 Test procedure 21 5.19.3 Requirements 21 5.20 Sulfur dioxide SO 2corrosion (endurance) .22 5.20.1 Object of the test .22 5.20.2 Test

15、procedure 22 5.20.3 Requirements 22 iv ISO 2014 All rights reserved ISO 7240-8:2014(E)5.21 Shock (operational) .23 5.21.1 Object of the test .23 5.21.2 Test procedure 23 5.21.3 Requirements 24 5.22 Impact (operational) .24 5.22.1 Object of the test .24 5.22.2 Test procedure 24 5.22.3 Requirements 25

16、 5.23 Vibration, sinusoidal, (operational) .25 5.23.1 Object of the test .25 5.23.2 Test procedure 25 5.23.3 Requirements 26 5.24 Vibration, sinusoidal (endurance) 26 5.24.1 Object of the test .26 5.24.2 Test procedure 26 5.24.3 Requirements 27 5.25 Electromagnetic Compatibility (EMC), Immunity test

17、s (operational) .27 5.26 Fire sensitivity 28 5.26.1 Object of the test .28 5.26.2 Test procedure 28 6 Test report 30 7 Marking .30 8 Data .31 8.1 Hardware documentation 31 8.2 Software documentation .31 Annex A (normative) Gas test chamber for CO response value and cross sensitivity measurements 33

18、Annex B (normative) Heat tunnel for response time and response temperature measurements .34 Annex C (normative) Apparatus for impact test 35 Annex D (normative) Fire test room 37 Annex E (normative) Smouldering (pyrolysis) wood fire (TF2) .39 Annex F (normative) Glowing smouldering cotton fire (TF3)

19、 43 Annex G (normative) Open plastics (polyurethane) fire (TF4) .47 Annex H (normative) Liquid (n-heptane) fire (TF5) .50 Annex I (informative) Information concerning the construction of the gas test chamber .53 Annex J (informative) Construction of the heat tunnel 55 ISO 2014 All rights reserved v

20、ISO 7240-8:2014(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a su

21、bject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (

22、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 Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should b

23、e 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 some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identi

24、fying 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 declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenie

25、nce 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 information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword Su

26、pplementary information. The committee responsible for this document is ISO/TC 21, Equipment for fire protection and firefighting, Subcommittee SC 3, Fire detection and alarm systems. This second edition cancels and replaces the first edition (ISO 7240-8:2007), which has been technically revised. IS

27、O 7240 consists of the following parts, under the general title Fire detection and alarm systems: Part 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 detec

28、tors using electro-chemical cells Part 7: Point-type smoke detectors using scattered light, transmitted 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-

29、type flame detectors Part 11: Manual call points Part 12: Line type smoke detectors using a transmitted optical beam Part 13: Compatibility assessment of system componentsvi ISO 2014 All rights reserved ISO 7240-8:2014(E) Part 14: Design, installation, commissioning and service of fire detection and

30、 fire alarm systems in and around buildings Part 15: Point-type fire detectors using smoke and heat 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

31、for emergency purposes Part 20: Aspirating smoke detectors Part 21: Routing equipment Part 22: Smoke-detection equipment for ducts Part 23: Visual alarm devices Part 24: Sound-system loudspeakers Part 25: Components using radio transmission paths Part 27: Point-type fire detectors using scattered li

32、ght, transmitted-light or ionization smoke sensor, an electrochemical-cell carbon-monoxide sensor and a heat sensor Part 28: Fire protection control equipment The following parts are under preparation: Part 29: Video fire detectors ISO 2014 All rights reserved vii ISO 7240-8:2014(E) Introduction Thi

33、s part of ISO 7240 has been prepared by the Subcommittee ISO/TC 21/SC 3 and is based on ISO 7240-8:2007. A fire detection and fire alarm system is required to function satisfactorily not only in the event of a fire, but also during and after exposure to conditions likely to be met in practice such a

34、s corrosion, vibration, direct impact, indirect shock, and electromagnetic interference. Some tests specified are intended to assess the performance of the fire detectors under such conditions. Test Fires TF2, TF3, TF4, and TF5 from ISO/TS 7240-9 have been included to verify the detection performanc

35、e of point fire detectors using a combination of carbon monoxide and heat sensors (CO) sensors. TF4 and TF5 specifically demonstrate the influence of the heat sensor(s). For these Test Fires, the CO level and, where applicable, the temperature is used as test validity criteria. This part of ISO 7240

36、 is not intended to place any other restrictions on the design and construction of such detectors. Carbon monoxide (CO) fire detectors can react promptly to slow smouldering fires involving carbonaceous materials. Although in the majority of fires, the products of combustion will be transported by c

37、onvection, the gaseous nature of CO means that it will also diffuse and, particularly in low energy fires, it can move ahead of the smoke plume and, thus, provide earlier detection. CO fire detectors alone might not react quickly to flaming fires and the addition of a heat sensor as specified in thi

38、s part of ISO 7240 provides better detection to a broader spectrum of fires. CO fire detectors based on a combination of a CO sensor and a heat sensor might also be better suited to applications where smoke detectors can produce unwanted alarms due to the presence of dust, steam, or cooking vapours,

39、 etc. While CO gas has greater mobility than smoke, it can be diluted by ventilation systems and be affected by convection currents. Hence, the same considerations as for point smoke detectors should be taken into account. Re-circulating systems confined to a single room have little effect on diluti

40、on, as this is similar to the natural diffusion of the CO gas. It is important that the location of CO fire detectors take into account areas where false operation or non-operation is likely. Some typical locations where it is important to carefully evaluate the use of CO fire detectors are as follo

41、ws: a) areas where CO gas can be present from exhausts and normal manufacturing processes; EXAMPLE Car parks, car-park return air plenums, loading docks. b) confined areas where tobacco smoking is likely.viii ISO 2014 All rights reserved Fire detection and alarm systems Part 8: Point-type fire detec

42、tors using a carbon monoxide sensor in combination with a heat sensor 1 Scope This part of ISO 7240 specifies requirements, test methods, and performance criteria for point multi- sensor fire detectors that incorporate at least one carbon monoxide (CO) sensor in combination with one or more heat sen

43、sors, for use in fire detection and alarm systems installed in buildings (see ISO 7240-1). For the testing of other types of CO multi-sensor fire detectors, or CO and heat multi-sensor fire detectors working on different principles, this part of ISO 7240 is only to be used for guidance. CO and heat

44、multi- sensor fire detectors with special characteristics and developed for specific risks are not covered by this part of ISO 7240. 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 r

45、eferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 209, Aluminium and aluminium alloys Chemical composition ISO 7240-1, Fire detection and alarm systems Part 1: General and definitions ISO 7240-5:20

46、12, Fire detection and alarm systems Part 5: Point-type heat detectors IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-1, Environmental testing Part 2: Tests Test A: Cold IEC 60068-2-2, Environmental testing Part 2-2: Tests Test B: Dry heat IEC 60068-2-6, Environmental te

47、sting Part 2: Tests Test Fc: Vibration sinusoidal IEC 60068-2-27, Basic environmental testing procedures Part 2: Tests Test Ea and guidance: Shock IEC 60068-2-30, Environmental testing Part 2-30: Tests Test Db Damp heat, cyclic (12 h+ 12 h cycle) IEC 60068-2-42, Environmental testing Part 2-42: Test

48、s Test Kc: Sulphur dioxide test for contacts and connections IEC 60068-2-78, Environmental testing Part 2-78: Tests Test Cab: Damp heat, steady state IEC 62599-2, Alarm systems Part 2: Electromagnetic compatibility Immunity requirements for components of fire and security alarm systems INTERNATIONAL

49、 ST ANDARD ISO 7240-8:2014(E) ISO 2014 All rights reserved 1 ISO 7240-8:2014(E) 3 Terms and definitions and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms, definitions, and abbreviated terms given in ISO 7240-1 and the following apply. 3.1.1 CO response value CO concentration in the proximity of the specimen at the moment that it generates an alarm signal, when tested as described in 5.1.5 Note 1 to entry: The