1、 Reference number ISO 7240-6:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 7240-6 Second edition 2011-06-15 Fire detection and alarm systems Part 6: Carbon monoxide fire detectors using electro-chemical cells Systmes de dtection et dalarme dincendie Partie 6: Dtecteurs de monoxyde de carbone pour la dt
2、ection dincendie utilisant des cellules lectro-chimiques ISO 7240-6:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying a
3、nd microfilm, without permission in writing 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 + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland i
4、i ISO 2011 All rights reservedISO 7240-6:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword .v Introduction.vii 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Requirements.2 4.1 Compliance 2 4.2 Individual alarm indication .2 4.3 Connection of ancillary devices 2 4.4 Monit
5、oring of detachable detectors 2 4.5 Manufacturers adjustments.2 4.6 On-site adjustment of response behaviour 3 4.7 Rate-sensitive response behaviour.3 4.8 Marking.3 4.9 Data.4 4.10 Requirements for software controlled detectors .4 5 Test methods .5 5.1 General .5 5.2 Repeatability 8 5.3 Directional
6、dependence9 5.4 Reproducibility 9 5.5 Exposure to chemical agents at environmental concentrations10 5.6 Long-term stability 11 5.7 Saturation.11 5.8 Exposure to chemical agents that can be present during a fire 12 5.9 Variation in supply parameters13 5.10 Air movement.13 5.11 Dry heat (operational)
7、.14 5.12 Cold (operational)15 5.13 Damp heat cyclic (operational) 16 5.14 Damp heat, steady state (endurance)17 5.15 Low humidity, steady state (endurance).17 5.16 Sulfur dioxide (SO 2 ) corrosion (endurance).18 5.17 Shock (operational) .19 5.18 Impact (operational) 20 5.19 Vibration, sinusoidal (op
8、erational) 21 5.20 Vibration, sinusoidal (endurance) .22 5.21 Electromagnetic compatibility (EMC) immunity test (operational) 23 5.22 Fire sensitivity .23 6 Test report25 Annex A (normative) Gas test chamber for response threshold value and cross-sensitivity measurements .26 Annex B (normative) Appa
9、ratus for impact test27 Annex C (normative) Fire test room29 Annex D (normative) Smouldering (pyrolysis) wood fire (TF2) .31 Annex E (normative) Glowing smouldering cotton fire (TF3) 34 ISO 7240-6:2011(E) iv ISO 2011 All rights reservedAnnex F (normative) Deep-seated smouldering cotton fire (TF9)37
10、Annex G (informative) Information concerning the construction of the gas test chamber.40 Bibliography 42 ISO 7240-6:2011(E) ISO 2011 All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
11、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 on that committee. International organizations, governmental and non-gover
12、nmental, 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. Th
13、e main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote
14、. 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. ISO 7240-6 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fi
15、ghting, Subcommittee SC 3, Fire detection and alarm systems. This second edition cancels and replaces the first edition (ISO 7240-6:2004), which has been technically revised. ISO 7240 consists of the following parts, under the general title Fire detection and alarm systems: Part 1: General and defin
16、itions 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, transmitted light or ionization
17、 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 a transmitted optical beam P
18、art 13: Compatibility assessment of system components ISO 7240-6:2011(E) vi ISO 2011 All rights reserved Part 14: Guidelines for drafting codes of practice for design, installation and use of fire detection and fire alarm systems in and around buildings Technical Report Part 15: Point type fire dete
19、ctors using scattered 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 e
20、mergency purposes Part 20: Aspirating smoke detectors Part 21: Routing equipment Part 22: Smoke-detection equipment for ducts Part 24: Sound-system loudspeakers Part 25: Components using radio transmission paths Part 27: Point-type fire detectors using a scattered-light, transmitted-light or ionizat
21、ion smoke sensor, an electrochemical-cell carbon-monoxide sensor and a heat sensor Part 28: Fire protection control equipment A part 23 dealing with visual alarm devices and a part 29 dealing with video fire detectors are under development. ISO 7240-6:2011(E) ISO 2011 All rights reserved viiIntroduc
22、tion This part of ISO 7240 has been drawn up by ISO/TC 21/SC 3 and is based on a standard prepared by Standards Australia International Technical Committee FP-002 “Fire detection, warning, control and intercom systems”. A fire detection and fire alarm system is required to function satisfactorily no
23、t only in the event of a fire, but also during and after exposure to conditions that the system is likely to meet in practice, such as corrosion, vibration, direct impact, indirect shock and electromagnetic interference. Some tests specified are intended to assess the performance of the fire detecto
24、rs under such conditions. The performance of fire detectors is assessed from results obtained in specific tests; this part of ISO 7240 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, smo
25、uldering fires involving carbonaceous materials because CO does not depend solely on convection, but also moves by diffusion, and CO fire detectors can be better suited to applications where other fire detection techniques are prone to false alarms, i.e. due to dust, steam and cooking vapours. Whils
26、t CO gas has greater mobility than smoke, it can be diluted by ventilation systems and can be affected by convection currents. Hence, it is necessary to take into account the same considerations as for point smoke detectors. Recirculating systems confined to a single room have little effect on dilut
27、ion, as this is similar to the natural diffusion of the CO gas. CO fire detectors can be less affected by stratification than other types of fire detectors. It is important that the location of CO fire detectors take into account areas where false operation or non- operation is likely. CO fire detec
28、tors might not be suitable for detecting fires involving clean-burning liquids, PVC-insulated cables, combustible metals, certain self-oxidizing chemicals, non-carbonaceous materials. Some typical locations where it is important to carefully evaluate the use of CO fire detectors are areas where CO g
29、as can be present from exhausts and normal manufacturing processes. EXAMPLES Car parks, car-park return air plenums, loading docks. Generally, cigarette smoke does not contain sufficient CO to cause alarms, even though smoke can be clearly visible. However, in heavy smoking or incense-burning areas,
30、 it is important to measure the CO concentration before installing CO fire detectors. This part of ISO 7240 includes a number of Electromagnetic Compatibility (EMC) immunity requirements. The details for these requirements have been taken from EN 50130-4. INTERNATIONAL STANDARD ISO 7240-6:2011(E) IS
31、O 2011 All rights reserved 1Fire detection and alarm systems Part 6: Carbon monoxide fire detectors using electro-chemical cells 1 Scope This part of ISO 7240 specifies requirements, test methods and performance criteria for point fire detectors using electro-chemical cells that operate using carbon
32、-monoxide detection principles for use in fire detection and alarm systems installed in buildings (see ISO 7240-1). For the testing of other types of CO fire detectors working on different principles, this part of ISO 7240 can be used only for guidance. Fire detectors with special characteristics an
33、d developed for specific risks are not covered by this part of ISO 7240. 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 reference
34、d 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 IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-1, Environmental testing Part 2-1: Test
35、s 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
36、: 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 60068-2-78, Environmental testing Part 2-78: Tests Test Cab: Damp heat, steady state EN 50130-4, Alarm systems Part 4: Electrom
37、agnetic compatibility Product family standard: Immunity requirements for components of fire, intruder and social alarm systems ISO 7240-6:2011(E) 2 ISO 2011 All rights reserved3 Terms and definitions For the purposes of this document, the terms, definitions and symbols given in ISO 7240-1 and the fo
38、llowing apply. 3.1 response threshold value CO concentration in the proximity of the specimen at the moment that it enters an alarm state when tested as specified in 5.1.5 NOTE The response threshold value can depend on signal processing in the detector and in the control and indicating equipment. 4
39、 Requirements 4.1 Compliance In order to comply with this part of ISO 7240, the detector shall meet the requirements of this clause, which shall be verified by visual inspection or engineering assessment, shall be tested as specified in Clause 5 and shall meet the requirements of the tests. 4.2 Indi
40、vidual alarm indication Each detector shall be provided with an integral red visual indicator, by which the individual detector that released an alarm can be identified, until the alarm condition is reset. Where other conditions of the detector can be visually indicated, these shall be clearly disti
41、nguishable 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. The visual indicator shall be visible from a distance of 6 m in an ambient light intensity up to 500 lx at an an
42、gle of up to a) 5 from the axis of the detector in any direction, and b) 45 from the axis of the detector in at least one direction. 4.3 Connection of ancillary devices The detector may provide for connections to ancillary devices (e.g. remote indicators, control relays, etc.), but open- or short-ci
43、rcuit failures of these connections shall not prevent the correct operation of the detector. 4.4 Monitoring of detachable detectors 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 th
44、e base, in order to give a fault signal. 4.5 Manufacturers adjustments It shall not be possible to change the manufacturers settings except by special means (e.g. the use of a special code or tool), or by breaking or removing a seal. ISO 7240-6:2011(E) ISO 2011 All rights reserved 34.6 On-site adjus
45、tment of response behaviour If there is provision for on-site adjustment of the response behaviour of the detector, then a) for all of the settings at which the manufacturer claims compliance with this part of ISO 7240, the detector shall comply with the requirements of this part of ISO 7240 and acc
46、ess to the adjustment means shall be possible only by the use of a code or special tool, or by removing the detector from its base or mounting; b) any setting(s) at which the manufacturer does not claim compliance with this part of ISO 7240 shall be accessible only by the use of a code or special to
47、ol, and it shall be clearly marked on the detector or in the associated data that, if these setting(s) are used, the detector does not comply with this part of ISO 7240. These adjustments may be carried out at the detector or at the control and indicating equipment. 4.7 Rate-sensitive response behav
48、iour The response threshold value of the detector can depend on the rate of change of the CO concentration in the vicinity of the detector. Such behaviour may be incorporated in the detector design to improve the discrimination between ambient CO concentrations and those generated by a fire. If such
49、 rate-sensitive behaviour is included, then it shall not lead to a significant reduction in the sensitivity of the detector to fires, nor shall it lead to a significant increase in the probability of unwanted alarms. Since it is not practical to make tests with all possible rates of increase in CO concentration, an assessment of the rate sensitivity of the detector shall be made by analysis of the circuit/software and/or physical t
