ISO INTERNATIONAL STANDARD 2971 Fourth edition 2013-04-01 Cigarettes and filter rods Determination of nominal diameter - Method using a non-contact optical measuring apparatus Cigarettes et batonnets-filtres -Détermination du diametre nominal - Meéthode utilisant un instrument de mesure optique sans contact Reference number IS0 2971:2013(E) ISO @IS02013 No repr itted without license from IHS Not for Resale IS0 2971:2013(E) COPYRIGHTPROTECTEDDOCUMENT @IS02013 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 [email protected] Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved or networking permited without license from IHS Not for Resale IS0 2971:2013(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions 4 Principle ..2 5 Apparatus. ..2 6 Sampling. .3 7 Procedure. ..3 7.1 Preparation of test pieces .3 7.2 Adjustment and calibration .4 7.3 Measurement .4 8 Expression of results ..4 9 Repeatability and reproducibility ..5 10 Test report ..5 Annex A (normative) Calibration standards Annex B (informative) Measurement principle and required number of scans. Annex C (informative) Information on possible source of measurement error. ..10 Annex D (informative) Non-contact measurement techniques ..12 Annex E (informative) Alternative measurement techniques for the determination of nominal diameter of cigarettes and filter rods. .15 Annex F (informative) Protocol for ISO/TC 126/SC 1/WG 2 interlaboratory diameter measurement uncertainty study .17 ii thout license from IHS Not for Resale