ISO INTERNATIONAL STANDARD 17621 First edition 2015-09-15 Workplace atmospheres - Short term detector tube measurement systems Requirements and test methods Air des lieux de travail - Systemes de mesurage par tube détecteur a court terme - Exigences et méthodes d'essai Reference number ISO 17621:2015(E) ISO International Organization for Standardization see=Zhejang Institute of Standardization 5956617 @IS02015 mitted without license from IHS IS0 17621:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2015, Published in Switzerland 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 +41 22 749 09 47 copyright@iso.org www.iso.org Internatinai br DrganizationforStandardization Not for Resale, 2015/11/11 08:44:17 networking permited withoutlicense from IHS IS0 17621:2015(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Requirements .3 4.1 General .3 4.2 Detector tubes .3 4.2.1 Specified measuring range .3 4.2.2 Scale. 4.2.3 Evaluation of the stain. 4 4.2.4 Shelflife ..4 4.2.5 Mechanical strength. .4 4.2.6 Transportation temperature stability 4.2.7 Packing of the detector tubes. 4 4.2.8 Interferences .4 4.2.9 Overloading ..4 4.2.10 Environmental influences .4 4.2.11 Instruction for use for detector tubes 4.3 Detector tube pump. .5 4.3.1 General. ..5 4.3.2 Stroke volume. 5 4.3.3 Leakage ..5 4.3.4 Mechanical strength .5 4.3.5 Mechanical durability .5 4.3.6 Explosion hazard .6 4.3.7 Instructions for use for detector tube pumps. .6 5 Test conditions .6 5.1 General. .6 5.2 Reagents. .6 5.3 Apparatus.. 5.4 Independent method .6 5.5 Generation of test gas mixtures ..6 5.6 Test conditions for detector tubes 7 5.7 Test conditions for detector tube pumps 7 6 Test methods. 6.1 Detector tubes 7 6.1.1 Visual checks ..7 6.1.2 Test procedures. .8 6.1.3 Mechanical strength .9 6.2 Detector tube pumps. ..10 6.2.1 Stroke volume .10 6.2.2 Leakage. ..11 6.2.3 Mechanical strength. ..11 6.2.4 Mechanical durability ..11 6.2.5 Explosion hazard (electrically driven detector tube pumps only) ..11 6.2.6 Instructionsforuse ..11 7 Uncertainty of measurement .11 7.1 Potential sources of uncertainty ..11 7.2 Estimation of the uncertainty components. ..12 7.2.1 Combined stain component. ..12 7.2.2 Pump-stroke volume. ..14 ntemaonalganzatin5All rights reserved iii icensee=Zhejiang Institute of Standardization 5956617 vided by IHS under license with ISO d without license from IHS