ISO INTERNATIONAL STANDARD 11155-2 First edition 2009-01-15 Road vehicles Air filters for passenger compartments - Part 2: Test for gaseous filtration Vehicules routiers — Filtres a air pour I'habitacle - Partie 2: Essai pour le filtrage des gaz Reference number ISO 11155-2:2009(E) @ISO 2009 py IHS under ted without license from IHS Not for Resale ISO 11155-2:2009(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 downloading this file, parties accept therein the responsibility of not infringing Adobe's 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 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 DOCUMENT @ ISO2009 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 @ IS0 2009 - All rights reserved py IHS unde I without license from IHS Not for Resale ISO 11155-2:2009(E) Contents Page Foreword. iv 1 Scope . 2 Normative references .. 3 Terms and definitions... 4 Measurement accuracy .. 4.1 Flow rate. 4.2 Pressure..... 4.3 Temperature 4.4 Relative humidity ... 4.5 Challenge gas.... 5 General conditions . 5.1 Conditioning of challenge gas . 5.2 Cleanliness of influent air ... 5.3 Challenge gas concentration stability... 6 Test contaminants 6.1 Mandatory contaminants .... 6.2 Optionalcontaminants. 6.3 Other contaminants .... 7 Test equipment . 7.1 General layout ... 7.2 Test stand performance .... 6 7.3 Air supply ... 7.4 Test duct.. 7.5 Contaminant generation and supply ... 7.6 Sampling and analysis of challenge gas. 7.7 Test equipment constituents.... 8 Experimental determination of to, using tiag' 8 9 Preparation of filter/filter element for testing .. 8 10 Test methods.. 10.1 Purpose...... .8 10.2 Air pressure loss. 10.3 Preparation of challenge gases. 10.4 Determination of efficiency/breakthrough .. 9 10.5 Determination of capacity..... 10.6 9 10.7 Determination of desorption (optional) ... 10 11 System validation .. 10 11.1 Air flow uniformity .. 10 11.2 Verification challenge gas stability (without test filter).... 10 12 Test report .... ................ 11 Annex A (normative) Test stand configuration ... 12 Annex B (normative) Detailed definition and calculation of to and tia Annex C (normative) Capacity determination ... 15 Annex D (informative) Conversion of test contaminant concentration units . .16 Bibliography. 17 Copyrgh Intematinal Organizationsandardizllinghts reserved ili ted withoutlicensefromIHS Not for Resale