BS-EN-ISO-21178-2006.pdf
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1、BRITISH STANDARD BS EN ISO 21178:2006 Light conveyor belts Determination of electrical resistances The European Standard EN ISO 21178:2006 has the status of a British Standard ICS 53.040.10 ? Licensed Copy: London South Bank University, London South Bank University, Sun Dec 24 04:37:07 GMT+00:00 200
2、6, Uncontrolled Copy, (c) BSI BS EN ISO 21178:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006 ISBN 0 580 49809 3 National foreword This British Standard was published by BSI. It is the UK implementation of EN IS
3、O 21178:2006. It is identical with ISO 21178:2005. It supersedes BS EN 1637:1999 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/67, Conveyor belts. A list of organizations represented on PRI/67 can be obtained on request to its secretary. This pu
4、blication 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. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South
5、 Bank University, London South Bank University, Sun Dec 24 04:37:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 21178 November 2006 ICS 53.040.10Supersedes EN 1637:1999 English Version Light conveyor belts - Determination of electrical resistan
6、ces (ISO 21178:2005) Courroies transporteuses lgres - Dtermination des rsistances lectriques (ISO 21178:2005) Leichte Fdergurte - Bestimmung der elektrischen Widerstnde (ISO 21178:2005) This European Standard was approved by CEN on 21 October 2006. CEN members are bound to comply with the CEN/CENELE
7、C Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN
8、 member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN me
9、mbers are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerl
10、and and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN
11、 ISO 21178:2006: E Licensed Copy: London South Bank University, London South Bank University, Sun Dec 24 04:37:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of ISO 21178:2005 has been prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)” of the Internat
12、ional Organization for Standardization (ISO) and has been taken over as EN ISO 21178:2006 by Technical Committee CEN/TC 188 “Conveyor belts“, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text o
13、r by endorsement, at the latest by May 2007, and conflicting national standards shall be withdrawn at the latest by May 2007. This document supersedes EN 1637:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impleme
14、nt this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United K
15、ingdom. Endorsement notice The text of ISO 21178:2005 has been approved by CEN as EN ISO 21178:2006 without any modifications. EN ISO 21178:2006 Licensed Copy: London South Bank University, London South Bank University, Sun Dec 24 04:37:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number
16、ISO 21178:2005(E) INTERNATIONAL STANDARD ISO 21178 First edition 2005-11-01 Light conveyor belts Determination of electrical resistances Courroies transporteuses lgres Dtermination des rsistances lectriques EN ISO 21178:2006 Licensed Copy: London South Bank University, London South Bank University,
17、Sun Dec 24 04:37:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, London South Bank University, Sun Dec 24 04:37:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Symbols. 1 4 Electrical su
18、rface resistances . 2 4.1 Method A: measurement of surface resistance ROA omni-directionally 2 4.2 Method B: measurement of surface resistance ROB in longitudinal and transverse direction. 5 5 Electrical surface resistivity s. 7 5.1 General. 7 5.2 Principle. 7 5.3 Apparatus 7 5.4 Preparation and pre
19、servation of test pieces prior to testing. 9 5.5 Procedure 9 5.6 Expression of results . 9 5.7 Test report . 10 6 Electrical volume resistances . 10 6.1 Volume resistance RD perpendicular to plane of belt. 10 6.2 Volume resistance RDi in longitudinal and transverse direction parallel to plane of bel
20、t 14 7 Electrical volume resistivity D. 17 7.1 Procedure 17 7.2 Expression of results . 17 7.3 Test report . 17 Annex A (informative) Comparative values for electrical resistances 18 EN ISO 21178:2006 Licensed Copy: London South Bank University, London South Bank University, Sun Dec 24 04:37:07 GMT+
21、00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (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
22、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 non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electr
23、otechnical Commission (IEC) on all matters of electrotechnical 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
24、 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 casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
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