ISO INTERNATIONAL STANDARD 16900-4 First edition 2011-09-01 Respiratory protective devices Methods of test and test equipment - Part 4: Determination of gas filter capacity and migration, desorption and carbon monoxide dynamic testing Appareils de protection respiratoire- Méthodes d'essai et équipement d'essai- Partie 4: Détermination de la capacite d'un filtre a gaz et essais de migration, de desorption et dynamique au monoxyde de carbone Reference number ISO 16900-4:2011(E) ISO ISO2011 ed without license from IHS Not for Resale ISO 16900-4:2011(E) COPYRiGHTPROTECTEDDOCUMENT 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 and microfilm, without permission in writing from either ISO at the address below or 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 2011 - All rights reserved Not for Resale ISO 16900-4:2011(E) Contents Page Foreword .iv Introduction 1 Scope 2 Normative references 3 Terms and definitions. 4 Prerequisites 5 General test requirements 6 Principles.. 6.1 Sorption tests 6.2 Migration and desorption tests 6.3 Carbon monoxide (co) dynamic testing of type Co filter. 7 Apparatus. 7.1 Apparatus for constant flow.. 7.2 Challenge gas generator.. 7.3 Test chamber 7.4 Detector 7.5 Apparatus for dynamic flow 8 Methods 8.1 General. 8.2 Test flow conditions. 8.3 Gas capacity test... 8 8.4 Gas filter validation test at specified flow rates. 8.5 Migration test A and Migration test B 8.6 Desorption test. 10 9 Test report 10 9.1 General 10 9.2 10 9.3 Gas filter validation test at specified flow rates. 10 9.4 Migration test.... 10 9.5 Desorption test. 10 9.6 co dynamic test, 10 10 Uncertainty of measurement. 10 Annex A (normative) Application of uncertainty of measurement. 11 Annex B (informative) Alternative method for the gas filter validation test at specified flow rates.. Bibliography ii ed without license from IHS Not for Resale