BS ISO BRITISHSTANDARD 12745:2008 Copper, lead and zinc ores and concentrates - Precision and bias of mass measurement techniques ICS 73.060.99 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHTLAW British Standards BS ISO 12745:2008 National foreword This British Standard is the UK implementation of ISO 12745:2008. The UK participation in its preparation was entrusted to Technical Committee NFE/36, Copper lead and zinc ores and concentrates. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendments/corrigenda issued since publication published under the authority of the Standards Policy and Strategy Date Comments Committee on 30 November 2008 CBSI2008 ISBN 978 0 580636196 BS ISO 12745:2008 ISO INTERNATIONAL STANDARD 12745 Second edition 2008-10-01 Copper, lead and zinc ores and concentratesPrecisionandbiasof mass measurement techniques Mineraiset concentres de cuivre,deplomb et dezinc-Justesse et erreurssystematiquesdestechniquesdepesée Reference number ISO 12745:2008(E) @ISO2008 BS ISO 12745:2008 ISO12745:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IsO at the address below or ISO's member body in the country of the requester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @Is0 2008-All rights reserved BSISO12745:2008 ISO12745:2008(E) Contents Page Foreword V 1 Scope 2 Normative references 3 Terms and definitions. 4 Generalremarks 4.1 Draft surveys 4.2 Beltscales 4.3 Weighbridges 4.4 Hopper scales 4.5 Gantry scales 4.6 Platformscales 5 Certified weights 6 Methodsofoperation 6.1 General. 6.2 Draft surveys 6.3 Beltscales 12 6.4 Weighbridges 14 6.5 Hopper scales. 16 6.6 Gantryscales 6.7 Platformscales Annex A (informative)Tables. AnnexB(informative)Statistics. AnnexC(informative)Draftsurveys 41 AnnexD(informative)Procedureforthetestingofstaticscales Bibliography ... ISO 2008 - All rights reserved ii BS ISO 12745:2008 ISO12745:2008(E) Foreword IsO (the International Organizationfor Standardization) is a worldwide federation of national standards bodies Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/lECDirectives,Part2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the mem