ISO-3085-2002.pdf
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1、 Reference number ISO 3085:2002(E) ISO 2002 INTERNATIONAL STANDARD ISO 3085 Fourth edition 2002-03-01 Iron ores Experimental methods for checking the precision of sampling, sample preparation and measurement Minerais de fer Mthodes exprimentales de contrle de la fidlit de lchantillonnage, de prparat
2、ion des chantillons et de mesurage ISO 3085:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the compute
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5、ntral Secretariat at the address given below. ISO 2002 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
6、 at the address below or ISOs 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 copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2002 All rights reserved ISO 3085:2002(E) ISO 2002 All ri
7、ghts reserved iii Contents Page Foreword.iv 1 Scope1 2 Normative references1 3 Definitions 1 4 Principle1 5 General conditions2 6 Method of experiment .3 7 Analysis of experimental data7 8 Interpretation of results and action.12 9 Test report12 Annex A (informative) Example of experiment on periodic
8、 systematic sampling by method 1.14 Annex B (informative) Alternative method for analysis of experimental data20 ISO 3085:2002(E) iv ISO 2002 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodie
9、s). The work of preparing International Standards is normally carried out through 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 and n
10、on-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Pa
11、rt 3. The main task of technical committees is to prepare International Standards. Draft International Standards 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 member bodies castin
12、g a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3085 was prepared by Technical Committee ISO/TC 102, Iron ore and direct
13、reduced iron, Subcommittee SC 1, Sampling. This fourth edition cancels and replaces the third which has been technically revised. Annexes A and B of this International Standard are for information only. -,-,- INTERNATIONAL STANDARD ISO 3085:2002(E) ISO 2002 All rights reserved 1 Iron ores Experiment
14、al methods for checking the precision of sampling, sample preparation and measurement 1 Scope This International Standard specifies experimental methods for checking the precision of sampling, sample preparation and measurement of iron ores being carried out in accordance with the methods specified
15、in ISO 3082 and the relevant ISO standards for measurement. NOTE This International Standard may also be applied for the purpose of checking the precision of sampling, sample preparation and measurement separately. 2 Normative references The following normative documents contain provisions which, th
16、rough reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibili
17、ty of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 3082:2000, Iron ores Sampling and sa
18、mple preparation procedures ISO 3084:1998, Iron ores Experimental methods for evaluation of quality variation ISO 11323:1), Iron ore and direct reduced iron Vocabulary 3 Definitions For the purposes of this International Standard, the definitions given in ISO 11323 apply. NOTE The precision of sampl
19、ing is defined mathematically in annex A of ISO 3082:2000. 4 Principle Sampling from twenty lots or more, preferably taking twice as many increments as specified in ISO 3082 and placing the increments alternately into two gross samples. If this is impracticable or the precision testing is carried ou
20、t in conjunction with routine sampling, the normal number of increments specified in ISO 3082 may be used. Preparation of separate test samples from each gross sample and determination of relevant quality characteristics. Analysis of the experimental data obtained and calculation of the estimated va
21、lue of the precision of sampling, sample preparation and measurement for each selected quality characteristic. 1) To be published. (Revision of ISO 11323:1996) -,-,- ISO 3085:2002(E) 2 ISO 2002 All rights reserved Comparison of the estimated precision with that specified in Table 1 of ISO 3082:2000
22、and necessary action if the estimated precision does not attain these specified values. 5 General conditions 5.1 Sampling 5.1.1 General The sampling procedure to be followed shall be selected from the two methods of sampling, viz. periodic systematic sampling or stratified sampling, depending on the
23、 method of taking increments from the lot in accordance with ISO 3082. 5.1.2 Number of lots To reach a reliable conclusion, it is recommended that the experiment be carried out on more than 20 lots of the same type of iron ore. However, if this is impracticable, at least 10 lots should be covered. I
24、f the number of lots for the experiment is not sufficient, each lot may be divided into several parts to produce more than 20 parts in total for the experiment, and the experiment should be carried out on each part, considering each part as a separate lot in accordance with ISO 3082. 5.1.3 Number of
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