ISO INTERNATIONAL STANDARD 6145-5 Second edition 2009-11-01 Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods - Part 5: Capillary calibration devices Analysedesgaz-Preparationdesmelangesdegazpourétalonnage aI'aide deméthodes volumétriques dynamiques Partie5:Dispositifsd'etalonnageparcapillaires Reference number ISO 6145-5:2009(E) ISO2009 ISO 6145-5:2009(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 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 the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT 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 Casepostale56·CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2009 - All rights reserved ISO6145-5:2009(E) Contents Page Foreword 1 Scope 2 Normative references 3 Principle. 4 Apparatus... 4.1 Two-capillary blending system... 4.1.1 Set-up.. 4.1.2 Apparatus 4.1.3 Procedure 4.2 Multiple capillary devices using gas dividers, 4.2.1 Set-up of a gas divider..... 4.2.2 Gasdividerswithacombinationofnon-identicalcapillaries. 4.2.3 Gas dividers with a combination of identical capillaries ... 4.2.4 Operation of a gas divider with identical capillaries .. 4.2.5 Determination of the flow rates....... 5 Expressionof results 5.1 Volumefraction 5.2 Sources of uncertainties.. 5.2.1 Temperature.. 5.2.2 Viscosity... 5.2.3 Pressure 5.2.4 Geometry of the capillary tubes... 5.3 Verification of the blending system/gas divider. 5.4 Determination of uncertainties ..... AnnexA(informative)Numericalexample.. AnnexB(informative)Derivation of theformulafor combineduncertainty inK. 13 Bibliography... @ IS0 2009 - All rights reserved ii ISO6145-5:2009(E) Foreword ISso (the International Organization for Standardization) is a worldwide federation of national standards bodies International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/lECDirectives,Part2 adoptedbythetechnical committeesarecirculatedtothememberbodiesforvoting.Publicationasan International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO6145-5waspreparedbyTechnicalCommitteeISO/TC158,Analysisofgases. This second edition cancels and replaces the first edition (isO 6145-5:2001), which has been technically revised. Some subclauses (such as Procedure and Calculations) have been detached from other closely and verification parts have been clarified and separated, the uncertainty section has been checked and slightly updated and Annex A has been revised. An informative derivation of the relative combined standard uncertainty calculation has been added as Annex B. mixturesusingdynamicvolumetricmethods: Part 1:Methods ofcalibration Part 2: Volumetric pumps Part 4: Continuous syringe injection method Part 5:Capillary calibrationdevices Part 6:Critical orifices Part7:Thermalmass-flowcontrollers Part 8: Diffusion method Part9:Saturationmethod Part10:Permeationmethod Part11:Electrochemicalgeneration ISO 6145-3, entitled Periodic injections into a flowing gas stream, has been withdrawn. iv @ ISO 2009 - All rights reserved INTERNATIONALSTANDARD ISO6145-5:2009(E) Gas analysis