ISO INTERNATIONAL STANDARD 7240-20 First edition 2010-05-15 Fire detection and alarm systems - Part 20: Aspirating smoke detectors Systemes de détection et d'alarme d'incendie - Partie 20: Detecteurs de fumée par aspiration Reference number ISO 7240-20:2010(E) @ ISO 2010 by IHS under lic Not for Resale ISO 7240-20:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's 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 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 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 COPYRIGHTPROTECTEDDOCUMENT @ISO2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, isO's 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 copyright@iso.org Web www.iso.org Published in Switzerland @ Iso 2010 - All rights reserved I without license from IHS Not for Resale ISO 7240-20:2010(E) Contents Page Foreword Introduction. ..vii 1 Scope 2 Normative references.. 3 Terms, definitions and abbreviated terms. 3.1 Terms and definitions ... 3.2 Abbreviated terms. 4 Requirements.. 4.1 4.2 Classification. 4.3 Individual visual alarm indication ... 4.4 Connectionofancillarydevices..... 4.5 Manufacturer's adjustments..... 4.6 On-site adjustment of response behaviour. 4.7 Response to slowly developing fires .... 4.8 Mechanical strength of the pipework... 4.9 Hardware components and additional sensing elements in the sampling device. 4.10 Airflow monitoring... 4.11 Power supply .. 4.12 Marking..... 4.13 Data.... 4.14 Additional requirements for software controlled detectors..... 5 Tests 5.1 General .8 5.2 Repeatability 5.3 Reproducibility 11 5.4 Variation in supply parameters. 12 5.5 Dry heat (operational) .. 13 5.6 Cold (operational).. 14 5.7 Damp heat, steady state (operational) 5.8 Damp heat, steady state (endurance).... 16 5.9 Sulfur dioxide (SO2) corrosion (endurance) ... 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 ..... 23 5.16 Mechanical strength of pipe.... 6 Test report.... Annex A (informative) Apparatus for response threshold value measurements..... Annex B (normative) Smouldering (pyrolysis) wood fire (TF2) .... Annex C (normative) Reduced smouldering pyrolysis wood fires (TF2A and TF2B). Annex D (normative) Glowing smouldering cotton fire (TF3).... Annex E (normative) Reduced glowing smouldering cotton fire (TF3A and TF3B).. Annex F (normative) Flaming plastics (polyurethane) fire (TF4) CopyrightIneationalOganzaadardizaoghtsreseved ili ted withoutlicensefromIHS Not for Resale