ISO INTERNATIONAL STANDARD 48-9 First edition 2018-08 Rubber, vulcanized or thermoplastic Determination of hardness Part 9: Calibration and verification of hardness testers Caoutchouc vulcanisé ou thermoplastique Deétermination de la dureté Partie9:Etalonnage et vérification des durometres Reference number ISO 48-9:2018(E) ISO @ IS0 2018 Provided by IHS Markit under license with ANSI IS0 48-9:2018(E) COPYRIGHTPROTECTEDDOCUMENT @IS02018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 below or ISo's member body in the country of the requester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @IS0 2018 -All rights reserved Provided by IHS Markit under iense withANS IS0 48-9:2018(E) Contents Page Foreword iv Introduction V 1 Scope. 1 2 Normative references . 3 Terms and definitions. 4 Measurands and metrological requirements for calibration and verification. 4.1 Environmental conditions.. 4.2 Metrological requirements. 5 Calibration and verification methods. .10 5.1 Requirements to be met by the measuring instruments used for the calibration and verification methods .. 5.2 Outline of the calibration and verification methods to be used 10 5.2.1 Indentors. 10 5.2.2 Geometry ofthepressure foot 11 5.2.3 Depth of indentation.... 11 5.2.4 Contact force of the pressure foot. 15 5.2.5 Springforce 16 5.2.6 Contact and total force of IRHD dead-load instruments 19 5.2.7 Duration of force application 19 6 Calibration and verification certificate. 20 @ IS0 2018 - All rights reserved ili Provided by IHS Markit under license with ANSI