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1、a Date: 7 February 2007 Origin: International Latest date for receipt of comments: 31 May 2007 Project no.: 1999/00608 Responsible committee: MCE/18/-/6 Contamination control Interested committees: Title: Draft British Standard BS ISO 11500 (REV) Hydraulic fluid power - Determination of particulate
2、contamination by automatic counting using the light interruption principle Supersession information: If this document is published as a standard, the UK implementation of it will supersede BSISO11500 : 1997 and partially supersede NONE . If you are aware of a current national standard which may be a
3、ffected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 May 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior
4、to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization
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6、are also available from BSI Customer Services. British Standards on CD or Online are available from British Standards Publishing Sales Limited. Tel: 01344 404409 or email bsonlinetechindex.co.uk. Information on the co-operating organizations represented on the committees referenced above may be obta
7、ined from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 01608 647900 Responsible Commit
8、tee Secretary: Ms Yvonne Pearman (BSI) E-mail: yvonnebfpa.co.uk Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 6.1 DPC: 07/19969755 DC Licensed Copy: London South Bank University, London South Bank Unive
9、rsity, Thu Mar 01 06:53:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are invited and will assist in the preparation of the consequent standard. Comments sub
10、mitted will be reviewed by the relevant BSI committee before sending the consensus UK vote and comments to the international secretariat, which will then decide appropriate action on the draft and the comments received. If no comments are received to the contrary, then the UK will approve this draft
11、. If the international standard is approved, it is possible the text will be published as an identical British Standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensu
12、re that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comm
13、ents should be compatible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given
14、 in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at:http:/www.bsi- Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Cl
15、ause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend t
16、o read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and W
17、indows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:53:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REF
18、ERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH. IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO W
19、HICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS. DRAFT INTERNATIONAL STANDARD ISO/DIS 11500 International Organization for Standardization, 2007 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION ISO/TC 131/SC 6 Voting begins on: 2007-01-30 Secretariat: BS
20、I Voting terminates on: 2007-06-30 Hydraulic fluid power Determination of particulate contamination level of a liquid sample by automatic particle counting using the light extinction principle Transmissions hydrauliques Dtermination du niveau de pollution particulaire dun chantillon liquide par comp
21、tage automatique des particules par absorption de lumire (Revision of first edition ISO 11500:1997 and ISO 11500/Cor.1:1998) ICS 23.100.60 In accordance with the provisions of Council Resolution 15/1993 this document is circulated in the English language only. Conformment aux dispositions de la Rsol
22、ution du Conseil 15/1993, ce document est distribu en version anglaise seulement. To expedite distribution, this document is circulated as received from the committee secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at publication stage. Pour acclrer la di
23、stribution, le prsent document est distribu tel quil est parvenu du secrtariat du comit. Le travail de rdaction et de composition de texte sera effectu au Secrtariat central de lISO au stade de publication. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:53:5
24、0 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 11500 ii ISO 2007 All rights reserved 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 l
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27、ng to it is found, please inform the Central Secretariat at the address given below. Copyright notice This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted under the applicable laws of the users country, neither this ISO draft nor any extract from
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30、don South Bank University, London South Bank University, Thu Mar 01 06:53:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 11500 ISO 2006 All rights reserved iii Contents Foreword.iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Apparatus.2 5 Diluent liquid3 6 Pre
31、-test requirements and procedures .3 6.1 Precautions 3 6.1.1 Chemicals.3 6.1.2 Electrical interference.3 6.1.3 Use of magnetic stirrer4 6.1.4 Relative humidity.4 6.1.5 Sample storage4 6.2 Glassware cleaning procedure 4 6.3 APC calibration procedure .4 6.4 APC operation4 6.5 Sample preparation before
32、 counting.5 6.6 Determination of need for sample dilution .7 7 Procedure for determining the particulate contamination level by automatic counting .7 7.1 Outline.7 7.2 Sample dilution9 7.2.1 Use of sample dilution 9 7.2.2 Precautions 9 7.2.3 Volumetric dilution method9 7.2.4 Mass dilution method10 7
33、.3 Analysis procedure .10 7.4 Analysis of different liquids12 8 Test report12 9 Identification statement (reference to this International Standard) 13 Annex A (normative) Procedure for performing a statistical check of an automatic particle counter14 Annex B (informative) Acceptable diluents15 Annex
34、 C (informative) Method for pre-cleaning diluent and method for incorporating additives into the diluent to eliminate the influence of static electricity on particle counts16 C.1 Diluent pre-cleaning system.16 C.2 Procedure for determining the cleanliness level of pre-cleaned diluent.17 C.3 Procedur
35、e for incorporating additives into the diluent to eliminate the influence of static electricity on particle counts17 Annex D (informative) Form for reporting particulate contamination level in a hydraulic liquid sample as determined by automatic counting.18 Annex E (informative) Data from round robi
36、n test program conducted to verify the procedure specified in ISO 11500 .19 Bibliography26 DRAFT 2007 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:53:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 11500 iv ISO 2006 All rights reserved Foreword ISO (
37、the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). 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 commi
38、ttee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotec
39、hnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the membe
40、r bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifyin
41、g any or all such patent rights. ISO 11500 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 6, Contamination control. This second edition cancels and replaces the first edition which has been technically revised. DRAFT 2007 Licensed Copy: London South Bank Univers
42、ity, London South Bank University, Thu Mar 01 06:53:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 11500 ISO 2006 All rights reserved v Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. The liquid is
43、both a lubricant and a power-transmitting medium. The presence of solid contaminant particles in the liquid interferes with the ability of the hydraulic fluid to lubricate and causes wear to the components. The extent of contamination in the fluid has a direct bearing on the performance and reliabil
44、ity of the system and needs to be controlled to levels that are considered appropriate for the system concerned. Quantitative determination of particulate contamination requires precision in obtaining the sample and in determining the extent of contamination. The liquid automatic particle counter (A
45、PC), which works on the light extinction principle, has become an accepted means of determining the extent of contamination. The accuracy of particle count data can be affected by the techniques used to obtain those data. This International Standard details procedures for the analysis of contaminate
46、d liquid samples using an automatic particle counter. Correct use of an automatic particle counter will help to reduce errors and will enhance the accuracy of reproducibility in data. The major differences between ISO 11500:1997 and this edition include: a) inclusion of a “quick check” method to det
47、ermine the presence of water in the sample; b) update of the method of calibrating the automatic particle counter (APC) from ISO 4402 to ISO 11171; c) elimination of requirement to check samples in a class 100 000 clean room; d) improved dilution methods; e) improved guidelines on APC operation, inc
48、luding guidance for detecting and correcting coincidence error; f) revision of how to determine the reported particle count. DRAFT 2007 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:53:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Licensed Copy: London Sout
49、h Bank University, London South Bank University, Thu Mar 01 06:53:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DRAFT INTERNATIONAL STANDARD ISO/DIS 11500 ISO 2006 All rights reserved 1 Hydraulic fluid power Determination of particulate contamination level of a liquid sample by automatic particle counting using the light extinction principle 1 Scope This International Standard specifies