ISO INTERNATIONAL STANDARD 16911-2 First edition 2013-03-01 Stationary source emissions - Manual and automatic determination of velocity and volume flow rate in ducts . Part 2: Automated measuring systems Emissions de sources fixes - Détermination manuelle et automatique de la vitesse et du debit-volume d'écoulement dans les conduits Partie 2: Systemes de mesure automatiques Reference number IS0 16911-2:2013(E) LSO @ IS0 2013 I without license from IHS Not for Resale IS0 16911-2:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 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. 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 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 16911-2:2013(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 Symbols and abbreviations 4.1 Symbols ..4 4.2 Abbreviations ..5 5 Principle .6 5.1 General .6 5.2 Importance of minimizing systematic errors 5.3 Relationship to EN 14181. ..7 6 Type testing, quality assurance level 1 data .7 6.1 .7 Introduction 6.2 Performance criteria. .8 6.3 Flow reference material or procedure ..8 6.4 Qualityassurancelevel1calculation .9 6.5 Velocity check points and quality assurance level 3 .9 Selection of automated measuring system location ..10 7.1 General ..10 7.2 Selection based upon pre-investigation .10 7.3 Selection based upon a predictable flow profile .10 7.4 Qualifying the automated measuring system calibration through a type 2 quality assurance level 2 procedure.. ..11 7.5 Ports and working platforms. ..11 8 Pre-investigation of flow profile .11 8.1 General. .11 8.2 Pre-investigation by measurement ..12 8.3 Pre-investigation by computational fluid dynamics (CFD) ..13 8.4 Automated measuring system selection guide .14 8.5 Qualityassurancelevel2requirements 14 Calibration and validation of the automated measuring system (quality assurance level 2 9 and annual surveillance test) .14 9.1 Selection of calibration method .14 9.2 Selection of calibration method, if calculation methods are used .15 9.3 Calibration procedure .15 9.4 Functionaltests.. .15 9.5 Parallel measurements with a standard reference method .15 9.6 Walleffects. .16 9.7 Automated measuring system flow calibration procedure with transit time tracer .17 9.8 Dataevaluation. 17 9.9 Calibration function of the automated measuring system and its validity .17 9.10 Calculation of variability.. 18 9.11 Test of variability and annual surveillance test of validity of the calibration function .18 9.12 Test of R2 18 9.13 Quality assurance level 2 and annual surveillance test report ..18 10 Commissioning documentation ..19 11 On-going quality assurance during operation (quality assurance level 3) .19 12 Assessment of uncertainty in volume flow rate ..19 iii se with ISt thout license from IHS Not for Resale