ISO 7240-12-2014 Fire detection and alarm systems - Part 12 Line type smoke detectors using a transmitted optical beam《火灾探测和警报系统 第12部分 利用传输光束的线型感烟探测器》.pdf

《ISO 7240-12-2014 Fire detection and alarm systems - Part 12 Line type smoke detectors using a transmitted optical beam《火灾探测和警报系统 第12部分 利用传输光束的线型感烟探测器》.pdf》由会员分享，可在线阅读，更多相关《ISO 7240-12-2014 Fire detection and alarm systems - Part 12 Line type smoke detectors using a transmitted optical beam《火灾探测和警报系统 第12部分 利用传输光束的线型感烟探测器》.pdf（60页珍藏版）》请在麦多课文档分享上搜索。

1、 ISO 2014 Fire detection and alarm systems Part 12: Line type smoke detectors using a transmitted optical beam Systmes de dtection dincendie et dalarme Partie 12: Dtecteurs linaires de fume utilisant une transmission par faisceaux lumineux INTERNATIONAL STANDARD ISO 7240-12 Second edition 2014-04-15

2、 Reference number ISO 7240-12:2014(E) ISO 7240-12:2014(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 in any form or by any means, electronic or mechanical, i

3、ncluding 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 postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax

4、+ 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 7240-12:2014(E) ISO 2014 All rights reserved iii Contents Page Foreword v Introduction vii 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 2 4 Requirements 3 4.1 Compliance . 3 4.2 Individual alarm

5、 indication 3 4.3 Connection of ancillary devices 4 4.4 Monitoring of detachable detectors and connections . 4 4.5 Manufacturers adjustments . 4 4.6 On-site adjustment of response threshold value . 4 4.7 Protection of optical components. 4 4.8 Limit of compensation 5 4.9 Fault signalling 5 4.10 Soft

6、ware-controlled detectors . 5 5 Test methods . 6 5.1 General . 6 5.2 Reproducibility . 9 5.3 Repeatability 10 5.4 Alignment dependence .10 5.5 Variation of supply parameters .11 5.6 Rapid changes in attenuation 12 5.7 Slow changes in attenuation 12 5.8 Optical path length dependence .13 5.9 Fire sen

7、sitivity 13 5.10 Stray light 15 5.11 Dry heat (operational) .16 5.12 Cold (operational) .17 5.13 Damp heat, steady-state (operational)19 5.14 Damp heat, steady-state (endurance) 20 5.15 Vibration, sinusoidal (endurance) 20 5.16 Electromagnetic compatibility (EMC), immunity tests (operational) 21 5.1

8、7 Sulfur dioxide, SO 2 , corrosion (endurance) 22 5.18 Impact (operational) .23 6 Test report 24 7 Marking .24 8 Data .25 Annex A (informative) Compensation for detector drift .26 Annex B (normative) Bench for response threshold value measurements 31 Annex C (normative) Fire test room .33 Annex D (n

9、ormative) Smouldering p yr ol y sis w ood fir e (TF2) .35 Annex E (normative) Glo wing smouldering c ott on fir e (TF3) 38 Annex F (normative) Flaming plastics (pol yur ethane) fir e (TF4) 40 Annex G (normative) Flaming liquid (n-heptane) fir e (TF5) .42 Annex H (normative) Smoke-measuring instrumen

10、ts 43 Annex I (normative) Apparatus for stray light 46 ISO 7240-12:2014(E)iv ISO 2014 All rights reserved Annex J (informative) Information concerning the construction of the measuring ionization chamber .48 ISO 7240-12:2014(E) Foreword ISO (the International Organization for Standardization) is a w

11、orldwide 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 subject for which a technical committee has been established has the right to be represented

12、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 (IEC) on all matters of electrotechnical standardization. The procedures used to develop thi

13、s 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 be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Di

14、rectives, Part 2. 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 identifying any or all such patent rights. Details of any patent rights identified during the developme

15、nt of the document will be in the Introduction and/or on the ISO list of patent declarations received. 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

16、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 - Supplementary information The committee responsible for this document is ISO/TC 21, Equipment for fire

17、 protection and fire fighting, Subcommittee SC 3, Fire detection and fire alarm systems. This second edition cancels and replaces the first edition (ISO 7240-12:2006), which has been technically revised. ISO 7240 consists of the following parts, under the general title Fire detection and alarm syste

18、ms: 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 detectors using electro-chemical cells Part 7: Point-type smoke detectors using scattered light, tr

19、ansmitted light or ionization Part 8: Carbon monoxide fire detectors using an electro-chemical cell 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

20、 a transmitted optical beam Part 13: Compatibility assessment of system components ISO 2014 All rights reserved v ISO 7240-12:2014(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 sca

21、ttered light, transmitted light or ionization sensors in combination with a heat sensor 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 purpos

22、es 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 a scattered-light, transmitted-l

23、ight or ionization smoke sensor, an electrochemical-cell carbon-monoxide sensor and a heat sensor Part 28: Fire protection control equipment A Part 29 dealing with video fire detectors is under preparation.vi ISO 2014 All rights reserved ISO 7240-12:2014(E) Introduction This part of ISO 7240 has bee

24、n prepared by ISO/TC 21/SC 3, the secretariat of which is held by SA and is based on ISO 7240-12:2006. A fire detection and alarm system is required to function satisfactorily not only in the event of fire, but also during and after exposure to conditions likely to be met in practice, including corr

25、osion, vibration, direct impact, indirect shock and electromagnetic interference. Specific tests are intended to assess the performance of the smoke detectors under such conditions. This part of ISO 7240 is not intended to place any other restrictions on the design and construction of such detectors

26、. ISO 2014 All rights reserved vii Fire detection and alarm systems Part 12: Line type smoke detectors using a transmitted optical beam 1 Scope 1.1 This part of ISO 7240 specifies requirements, test methods and performance criteria for line-type smoke detectors for use in fire detection systems inst

27、alled in buildings. The detectors consist of at least a transmitter and a receiver and can include reflector(s), for the detection of smoke by the attenuation and/or changes in attenuation of an optical beam. 1.2 This part of ISO 7240 does not cover line-type smoke detectors designed to operate with

28、 separations between opposed components of less than 1 m; line-type smoke detectors whose optical path length is defined or adjusted by an integral mechanical connection; line-type smoke detectors with special characteristics, which cannot be assessed by the test methods in this part of ISO 7240. NO

29、TE The term “optical” is used to describe that part of the electromagnetic spectrum produced by the transmitter to which the receiver is responsive; this is not restricted to visible wavelengths. 2 Normative references The following documents, in whole or in part, are normatively referenced in this

30、document and are indispensable for its application. For dated references, 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

31、and alarm systems Part 1: General and definitions IEC 60064, Tungsten filament lamps for domestic and similar general lighting purposes Performance requirements IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-1, Environmental testing Part 2-1: Tests. Tests A: Cold IEC 600

32、68-2-2, Environmental testing Part 2-2: Tests. Tests 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 60068-2-42, Environmental testing Part 2-42: Tests. Test Kc:

33、Sulphur dioxide test for contacts and connections IEC 60068-2-78, Environmental testing Part 2-78: Tests. Test Cab: Damp heat, steady state INTERNATIONAL ST ANDARD ISO 7240-12:2014(E) ISO 2014 All rights reserved 1 ISO 7240-12:2014(E) IEC 60081, Double-capped fluorescent lamps Performance specificat

34、ions EN 50130-4:2011, Alarm systems Part 4: Electromagnetic compatibility Product family standard: Immunity requirements for components of fire, intruder and social alarm systems 3 T erms a nd definiti ons For the purposes of this document, the terms and definitions given in ISO 7240-1 and the follo

35、wing apply. 3.1 attenuation A reduction in intensity of the optical beam at the receiver, defined by the equation where I 0 is the received intensity without reduction in intensity; I is the received intensity after reduction in intensity Note 1 to entry: The attenuation is expressed in units of dec

36、ibels (dB). 3.2 opposed component component transmitter and receiver or transmitter-receiver and reflector(s) of the detector whose position determines the optical path 3.3 optical path length total distance traversed by the optical beam between the transmitter and the receiver 3.4 receiver componen

37、t that receives the optical beam 3.5 response threshold value C value of attenuation at the moment an alarm signal is generated where2 ISO 2014 All rights reserved ISO 7240-12:2014(E) F is the value of attenuation resulting from a beam passing once through a filter, and given by the formula I I ; I

38、0 is the received intensity of the optical beam without reduction through an attenuating filter; I is the received intensity of the optical beam after passing once through an attenuating filter; n f is the number of times the beam passes through the filter; n v is the number of times the beam passes

39、 through the measured volume Note 1 to entry: The attenuation is expressed in units of decibels (dB). Note 2 to entry: The inclusion of n n means that the value of C recorded for a multipass arrangement tested by obscuring the beam only once (at the receiver, as recommended in B.1.2) is consistent w

40、ith a single pass (end- to-end) arrangement. 3.6 sensitivity adjustment any adjustment during or after commissioning which leads to a change in the response to fire 3.7 separation physical distance between the opposed components 3.8 transmitter component from which the optical beam emanates 4 Requir

41、ements 4.1 Compliance In order to comply with this part of ISO 7240, the detector shall meet the following requirements. a) Clause 4, which shall be verified by visual inspection or engineering assessment, shall be tested in accordance with Clause 5 and shall meet the requirements of the tests. b) C

42、lauses 7 and 8, which shall be verified by visual inspection. 4.2 Individual alarm indication 4.2.1 Each detector shall be provided with an integral red visual indicator by which the individual detector releasing an alarm can be identified, until the alarm condition is reset. Where other conditions

43、of the detector can be visually indicated, these shall be clearly distinguishable from the alarm indication, except when the detector is switched into a service mode. For detachable detectors, the indicator may be integral with the base or the detector head. 4.2.2 The visual indicator shall be visib

44、le from a distance of 6 m in an ambient light intensity up to 500 lx at an angle up to a) 5 from the vertical axis of the detector when viewed from beneath the detector in any direction and ISO 2014 All rights reserved 3 ISO 7240-12:2014(E) b) 45 from the vertical axis of the detector when viewed fr

45、om beneath the detector in at least one direction. 4.3 Connection of ancillary devices The detector may provide for connections to ancillary devices (remote indicators, control relays, etc.), but open- or short-circuit failures of these connections shall not prevent the correct operation of the dete

46、ctor. 4.4 Monitoring of detachable detectors and connections 4.4.1 For detachable detectors, a means shall be provided for a remote monitoring system (e.g. the control and indicating equipment) to detect the removal of the head from the base, in order to give a fault signal. 4.4.2 If there are cable

47、s connecting separate parts of the detector, then a means shall be provided for a remote monitoring system (e.g. the fire detection control and indicating equipment) to detect a short or open circuit on those cables, in order to give a fault signal. 4.4.3 If more than one detector can be connected t

48、o the transmission path of a remote monitoring system (e.g. control and indicating equipment), the removal of a head from the base shall not prevent an alarm signal from another detector connected to the same transmission path. 4.5 Manufacturers adjustments It shall not be possible to change the man

49、ufacturers settings except by special means (e.g. the use of a special code or tool) or by breaking or removing a seal. 4.6 On-site adjustment of response threshold value 4.6.1 If there is provision for on-site adjustment of the response threshold value of the detector then a) for all of the settings at which the manufacturer claims compliance, the dete