ISO INTERNATIONAL STANDARD 11790 Second edition 2017-06 Copper, lead, zinc and nickel concentrates Guidelines for the inspection of mechanical sampling systems Concentrés de cuivre, de plomb, de zinc et de nickel Lignes directrices pour le controle des systemes mécaniques d'échantillonnage Reference number ISO 11790:2017(E) [so International Organization for Standardization @ IS0 2017 ZHEJIANG INSTOFSTANDARDIZATION C15956617 Not for Resale, 2017/8/21 01:20:22 ed without license from IHS IS0 11790:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, 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. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internatinair PrganizationforStandardization nsee-ZHEJIANG INSTOF STANDARDIZAoSQa7 - All rights reserved Not for Resale, 2017/8/21 01:20:22 etworking permitted without license from IHS IS0 11790:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions 4 General consideration .2 4.1 Precision.. 2 4.2 Quality variation. 4.3 Bias. 2 4.4 Operation of the sampling system 2 5 Establishment of inspection system .3 5.1 General 3 5.2 Audits. .3 5.3 Mechanical inspections. 4 5.4 Operational inspections .4 6 Procedures. ..4 6.1 Audits 4 6.2 Mechanical inspections. .5 6.3 Operational inspections 6.4 Control charts. .6 6.4.1 General. 6.4.2 Sampling ratio .6 6.4.3 Extraction ratio 6.5 Sampling records .10 6.6 Operator's inspection report 10 Annex A (informative) Example of a sampling checklist for copper ore 11 Annex B (informative) Example of sampling plant operator's inspection report on a shift basis ...14 Annex C (informative) Example of sampling-system operations inspection summary .17 iii See=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under cense with ISt vithoutlicense from IHS Not for Resale, 2017/8/21 01:20:22