ISO/TS TECHNICAL SPECIFICATION 20460 First edition 2015-11-15 Paper and board Automated on-line testing Metrological comparability between standardized measurements and output of on-line gauges Papiers et cartons-Essais en ligne automatisésComparabilité métrologique entre mesures normalisées et résultats de jauges en continu Reference number IS0/TS 20460:2015(E) ISO @IS02015 IS0/TS 20460:2015(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2015, 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. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 [email protected] www.iso.org @ IS0 2015 - All rights reserved IS0/TS20460:2015(E) Contents Page Foreword .iv Introduction. .V 1 Scope. 2 Normative references .1 3 Terms and definitions .1 4 Methodology requirements .7 4.1 Requirements for the measuring equipment and its measurement process .7 4.1.1 General requirements for measuring systems .7 4.1.2 Consistency of the online equipment itself. .8 4.1.3 Consistency of the online measurement process ..8 4.2 Requirements for comparison of online and off-line equipment .8 4.2.1 Calibration procedure principles. 8 4.2.2 Calibration procedure requirements .9 5 Methods to evaluate comparability .9 5.1 Sampling operations, conditioning and stability 9 5.2 Basis weight 10 5.3 Thickness. .10 5.4 Moisture content. .10 5.5 Brightness, colour, whiteness, k and s 10 5.6 Ash content .11 5.7 Gloss .11 Annex A (informative) Typical tolerances ..12 Annex B (informative) Examples of graphical evaluations, .13 Annex C (informative) Online gauges principles, limitations to correlations, sources of errors....14 Bibliography .17 isn ta tandardzaon rights reserved iii