ISO/TR TECHNICAL REPORT 18491 First edition 2015-05-01 Welding and allied processes Guidelines for measurement of welding energies Soudage et techniques connexes - Lignes directrices pour le mesurage des énergies de soudage Reference number IS0/TR 18491:2015(E) SO International Organization for Standardization Zhejiang Institute of Standardization 5956617 IS02015 itted without license from IHS IS0/TR 18491:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland 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+412274909 47 [email protected] www.iso.org Intenationai br PrganizationforStandardization Not for Resale, 2015/8/6 09:45:03 etworking permitted without license from IHS IS0/TR 18491:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 General. .2 5 Apparatus .2 6 Determination of arc energy ..2 7 Measurement parameters .3 7.1 General. .3 7.2 Arc voltage. .3 7.3 Welding current .4 7.4 Instantaneous energy or instantaneous power. ..4 7.5 Travel speed and length ..4 8 Calibration and validation of measuring instruments .4 Annex A (informative) Range of power supply types and measurement methods .5 Bibliography 7 iii vided by IHS under ithout license from IHS