ISO INTERNATIONAL STANDARD 12963 First edition 2017-04 Gas analysis Comparison methods for the determination of the composition of gas mixtures based on one- and two-point calibration Analyse des gaz - Méthodes de comparaison pour la détermination de la composition des mélanges de gaz basées sur un ou deux points d'étalonnage Reference number ISO12963:2017(E) rso International Organization for Standardization @ IS0 2017 HEJIANG INST OF STANDARDIZATION C1 5956617 Not for Resale, 2017/8/21 00:56:50 ed without license from IHS IS0 12963:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, 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 [email protected] www.iso.org Intenationaibr PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZRoISQ s1.7 - All rights reserved Not for Resale, 2017/8/21 00:56:50 etworking permitted without license from IHS IS0 12963:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 4 Symbols. ..2 5 Abbreviated terms .2 6 Principle ..3 6.1 General requirements ..3 6.2 Calibration methods. .4 7 Main procedure .4 7.1 Pre-requisites 4 7.2 Sequence of operations (overview) 4 7.3 Calibration and measurement designs. .5 7.3.1 .5 General 7.3.2 Single-point exact-match calibration (SPEM) .6 7.3.3 Single-point through origin calibration (SPO) .6 7.3.4 Two-point calibration with a blank (TPB) 7 7.3.5 Two-point calibration with bracketing (TPC) .7 7.3.6 Multipoint calibration (MPC) ..8 8 Performance evaluation of the measuring system ..8 8.1 General ..8 8.2 Sources of performance evaluation data and alternative approach ..11 8.2.1 Performance evaluation other than in-house .11 8.2.2 Alternative for performance evaluation. .11 9 Quality assurance measures .11 9.1 Validation of the assumptions made .11 9.2 Drift/stability control of the measuring system ..11 10 Report of results .12 10.1Calibration gas certificates .12 10.2 Report of analysis .12 Annex A (normative) System-stability check required when using exact-match and bracketing designs .13 Annex B (normative) Statistics and sensitivity coefficients used in Clause 7 ..15 Annex C (normative) Alternative approach to assessing the nonlinearity contribution. ..17 Annex D (informative) Worked-out example .19 Annex E (informative) Using the designs without preceding system performance evaluation. ..22 Bibliography .24 iii ZHEJIANG INSTOFSTANDARDIZATION C15956617 I without license from IHS