ISO INTERNATIONAL STANDARD 19891-1 First edition 2017-07 Ships and marine technology Specifications for gas detectors intended for use on board ships Part 1: Portable gas detectors for atmosphere testing of enclosed spaces Navires ettechnologie maritime-Spécifications pour lesdétecteurs de gaz destinés a etre utilisés a bord des navires Partie 1:Detecteurs de gaz portables pour les essais atmospheriques desespaces clos Referencenumber ISO19891-1:2017(E) iso Intemational Organization for Standardization @ISO2017 IS019891-1:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,Published inSwitzerland 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, 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 ISO's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8. CP 401 CH-1214 Vernier,Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 [email protected] www.iso.org Intemationaibr PrganizationforStandardization Licensee-ZHEJIANG INSTOF STANDARDIzoISQ30,7 - All rights reserved networking permited without license from IHS Not for Resale, 2017/9/27 05:52:1 IS0 19891-1:2017(E) Contents Page Foreword ..iv Introduction. 1 Scope.. 2 Normativereferences 3 Terms and definitions ..2 4 Specification of portable gas detectors foratmosphere testing of enclosed spaces 2 4.1 General requirements 2 4.1.1 Gasesrequiredtobemeasured .2 4.1.2 Method of measurement .3 4.1.3 Basicperformance. .3 4.1.4 Portability 4 4.2 Sensitivities,indications,andalarms .4 4.3 Robustnessandelectrical safety 4 4.4 Marking and manual .4 4.4.1 Marking 4 4.4.2 Instruction manual 5 4.4.3 Testing. 5 emationalganizatinS7-All rights reserved iii See=ZHEJIANG INSTOFSTANDARDIZATIONC15956617 vithout license from IHS