1、 Reference number ISO 7240-20:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 7240-20 First edition 2010-05-15 Fire detection and alarm systems Part 20: Aspirating smoke detectors Systmes de dtection et dalarme dincendie Partie 20: Dtecteurs de fume par aspiration ISO 7240-20:2010(E) PDF disclaimer This
2、PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept there
3、in the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the
4、 PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUME
5、NT ISO 2010 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 and microfilm, without permission in writing from either ISO at the address below or ISOs member body i
6、n 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 ii ISO 2010 All rights reservedISO 7240-20:2010(E) ISO 2010 All rights reserved iiiContents Page Forewo
7、rd .v Introduction.vii 1 Scope1 2 Normative references1 3 Terms, definitions and abbreviated terms2 3.1 Terms and definitions .2 3.2 Abbreviated terms .2 4 Requirements.3 4.1 Compliance 3 4.2 Classification .3 4.3 Individual visual alarm indication3 4.4 Connection of ancillary devices 3 4.5 Manufact
8、urers adjustments.3 4.6 On-site adjustment of response behaviour 4 4.7 Response to slowly developing fires 4 4.8 Mechanical strength of the pipework 4 4.9 Hardware components and additional sensing elements in the sampling device.5 4.10 Airflow monitoring.5 4.11 Power supply .5 4.12 Marking.6 4.13 D
9、ata.6 4.14 Additional requirements for software controlled detectors7 5 Tests .8 5.1 General .8 5.2 Repeatability 11 5.3 Reproducibility 11 5.4 Variation in supply parameters12 5.5 Dry heat (operational) .13 5.6 Cold (operational)14 5.7 Damp heat, steady state (operational) 15 5.8 Damp heat, steady
10、state (endurance)16 5.9 Sulfur dioxide (SO 2 ) corrosion (endurance).17 5.10 Shock (operational) .18 5.11 Impact (operational) 19 5.12 Vibration, sinusoidal (operational) 20 5.13 Vibration, sinusoidal (endurance) .21 5.14 Electromagnetic compatibility (EMC) immunity tests .22 5.15 Fire sensitivity .
11、23 5.16 Mechanical strength of pipe.26 6 Test report26 Annex A (informative) Apparatus for response threshold value measurements.27 Annex B (normative) Smouldering (pyrolysis) wood fire (TF2) .32 Annex C (normative) Reduced smouldering pyrolysis wood fires (TF2A and TF2B)34 Annex D (normative) Glowi
12、ng smouldering cotton fire (TF3) 36 Annex E (normative) Reduced glowing smouldering cotton fire (TF3A and TF3B).38 Annex F (normative) Flaming plastics (polyurethane) fire (TF4) .40 ISO 7240-20:2010(E) iv ISO 2010 All rights reservedAnnex G (normative) Flaming liquid (n-heptane) fire (TF5) 42 Annex
13、H (normative) Reduced flaming liquid (n-heptane) fire (TF5A and TF5B).43 Annex I (normative) Fire test room and ventilation system45 Annex J (informative) Information concerning the requirements for the response to slowly developing fires .48 Annex K (informative) Apparatus for airflow monitoring te
14、st 52 Bibliography 54 ISO 7240-20:2010(E) ISO 2010 All rights reserved vForeword 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 tech
15、nical 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 liaison with ISO, also take part in the work. ISO collaborates closely
16、 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. The main task of technical committees is to prepare International Standards. Draft I
17、nternational 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. Attention is drawn to the possibility that some of the elements of this document
18、 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7240-20 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 3, Fire detection and alarm systems. ISO 7240 consists of
19、 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 detectors using electro
20、-chemical cells Part 7: Point-type smoke detectors using scattered light, transmitted 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 de
21、tectors Part 11: Manual call points Part 12: Line type smoke detectors using a transmitted optical beam Part 13: Compatibility assessment of system components Part 14: Guidelines for drafting codes of practice for design, installation and use of fire detection and fire alarm systems in and around bu
22、ildings Technical Report ISO 7240-20:2010(E) vi ISO 2010 All rights reserved Part 15: Point type fire detectors 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 Par
23、t 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-detection equipment for ducts Part 24: Sound-system loudspeakers Part 25: Components using radio t
24、ransmission paths Part 27: Point-type fire detectors using a scattered-light, transmitted-light or ionization 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, is under preparation.
25、ISO 7240-20:2010(E) ISO 2010 All rights reserved viiIntroduction This part of ISO 7240 is based on a European Standard EN 54-20:2006, prepared by the European Committee for Standardization CEN/TC 72 “Fire detection and fire alarm systems”. It has been reviewed and revised by ISO/TC 21/SC 3/WG 21. As
26、pirating smoke detectors differ from point-type smoke detectors (see ISO 7240-7) in that air is drawn into the smoke-sensing chamber, rather than relying on convection. This part of ISO 7240 is not intended to place any other restriction on the design and construction of such detectors. INTERNATIONA
27、L STANDARD ISO 7240-20:2010(E) ISO 2010 All rights reserved 1Fire detection and alarm systems Part 20: Aspirating smoke detectors WARNING Certain types of detectors contain radioactive materials. National requirements for radiation protection differ from country to country and they are not, therefor
28、e, specified in this part of ISO 7240. 1 Scope This part of ISO 7240 specifies the requirements, test methods and performance criteria for aspirating smoke detectors for use in fire detection and alarm systems installed in buildings. Aspirating smoke detectors developed for the protection of specifi
29、c risks that incorporate special characteristics (including additional features or enhanced functionality for which this part of ISO 7240 does not define a test or assessment method) are also covered by this part of ISO 7240. The performance requirements for any special characteristics are beyond th
30、e scope of 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 referenced document (including any amendments) a
31、pplies. ISO 7240-1, Fire detection and alarm systems Part 1: General and definitions ISO 7240-4, Fire detection and alarm systems Part 4: Power supply equipment ISO 7240-7:2003, Fire detection and fire alarm systems Part 7: Point-type smoke detectors using scattered light, transmitted light or ioniz
32、ation EN 50130-4:1995 + Amendment 1:1998 + Amendment 2:2003, Alarm systems Part 4: Electromagnetic compatibility Product family standard: Immunity requirements for components of fire, intruder and social alarm systems IEC 60068-2-1, Environmental testing Part 2-1: Tests Test A: Cold IEC 60068-2-2, E
33、nvironmental 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 60068-2-42, Environmental testing Part 2-42: Tests Test Kc: Sulphur dioxid
34、e test for contacts and connections IEC 60068-2-75, Environmental testing Part 2-75: Tests Test Eh: Hammer tests ISO 7240-20:2010(E) 2 ISO 2010 All rights reservedIEC 60068-2-78, Environmental testing Part 2-78: Tests Test Cab: Damp heat, steady state IEC 61386-1:2008, Conduit systems for cable mana
35、gement Part 1: General requirements 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 7240-1 and the following apply. 3.1.1 aspirating smoke detector smoke detector, in which air and aerosols are drawn throu
36、gh a sampling device and carried to one or more smoke-sensing elements by an integral aspirator (e.g. fan or pump) NOTE Each smoke sensing element may contain more than one sensor exposed to the same smoke sample. 3.1.2 response threshold value measure of the aerosol concentration in the proximity o
37、f the smoke sensing element at the moment that the specimen generates an alarm signal, when it is tested as described in 5.1.5 3.1.3 sampling device component or series of components or a dedicated device (e.g. a pipe network, dedicated duct, probe or hood) which forms part of the a.s.d. and transfe
38、rs samples of air to the smoke sensing element(s) NOTE The sampling device may be supplied separately. 3.1.4 sampling point any point at which an air sample is drawn into the sampling device 3.1.5 transport time time for aerosols to transfer from a sampling point to the smoke sensing element 3.2 Abb
39、reviated terms For the purposes of this document, the following abbreviations apply. a.s.d. aspirating smoke detector c.i.e. control and indicating equipment c.p.c. condensation particle counter EMC electromagnetic compatibility MIC measuring ionization chamber r.t.v. response threshold value ISO 72
40、40-20:2010(E) ISO 2010 All rights reserved 34 Requirements 4.1 Compliance To comply with this part of ISO 7240, the detector shall meet the requirements of Clause 4, which shall be verified by inspection and engineering assessment, and when tested in accordance with the tests described in Clause 5,
41、shall meet the requirements of the tests. 4.2 Classification The manufacturer shall clearly state, in accordance with the data presented in 4.13, to which class or classes the aspirating smoke detector is designed. To demonstrate compliance with a specific class, the aspirating smoke detector shall
42、be subjected to the appropriate fire sensitivity test as defined in 5.15. NOTE Due to the differences and many variations in the design of sampling devices, aspirating smoke detectors are generally intended for use in many varied and often rather specialized applications. Therefore, it might not be
43、practical to conduct type tests that define acceptance criteria for all of these applications. However, in recognition of the diversity of application, three classes are defined to enable system designers and installers to select the most appropriate sensitivity. Table 1 identifies the classes of de
44、tector and the corresponding fire tests used for the classification. Table 1 Classification of aspirating smoke detectors Class Description Example application(s) Test fires A Aspirating smoke detector providing very high sensitivity Very early detection: the detection of very dilute smoke, for exam
45、ple entering air conditioning ducts, to detect the extremely dilute concentrations of smoke that can emanate from equipment in an environmentally controlled area such as a clean room TF2A, TF3A, TF4 and TF5A B Aspirating smoke detector providing enhanced sensitivity Early detection: for example, spe
46、cial fire detection within or close to particularly valuable, vulnerable or critical items such as computer or electronic equipment cabinets TF2B, TF3B, TF4 and TF5B C Aspirating smoke detector providing normal sensitivity Standard detection: general fire detection in normal rooms or spaces, giving,
47、 for example, at least an equivalent level of detection as a point- or beam-type smoke detection system TF2, TF3, TF4 and TF5 4.3 Individual visual alarm indication Each aspirating smoke detector shall be provided with integral red visual indicator(s), visible from outside the aspirating smoke detec
48、tor, by which the individual smoke-sensing element(s) (see 3.1.1) that released an alarm can be identified until the alarm condition is reset. Where other conditions of the detector can be visually indicated, they shall be clearly distinguishable from the alarm indication. 4.4 Connection of ancillar
49、y devices The detector may provide for connections to ancillary devices (e.g. remote indicators, control relays). Open- or short-circuit failures of these connections shall not prevent the correct operation of the detector. 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 7240-20:2010(E) 4 I
