1、BRITISH STANDARD C ornrnuni cat ion cables - Specifications for test methods - Part 4-9: Environmental test methods - Pneumatic resistance The European Standard EN 50289-4-92001 has the status of a British Standard ICs 33.120.10 BS EN 5 O 2 89-4-9 :2 O0 1 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS
2、PERMITTED BY COPYRIGHT LAW BS EN 50289-4-9:2001 Amd. No. Date Q BSI 14 November 2001 National foreword Comments This British Standard is the official English language version of The UK participation in its preparation was entrusted by Technical Committee EPL/46, Cables, wire and waveguides, RF conne
3、ctors, and accessories for communication and signalling, to Subcommittee EPL/46/1, Communication cables, which lias the responsibility to: EN 50289-4-9:2001. - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for
4、change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement internatio
5、nal or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include a
6、ll the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Electrotechnical S
7、ector policy and Strategy Committee, was published under the authority ,fthe Standards policy and Strategy Committee on 14 November 2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright date displayed i
8、n this document indicates when the document was last issued. ISBN O 580 38693 7 E U ROP EAN STANDARD EN 50289-4-9 NORM E E U ROPE N N E EUROPISCHE NORM October 2001 ICs 33.120.10 English version Communication cables - Specifications for test methods Part 4-9: Environmental test methods - Pneumatic r
9、esistance Cbles de communication - Spcifications des mthodes dessai Partie 4-9: Mthodes dessais denvironnement - Rsistance pneumatique Kommunikationskabel- Spezifikationen fr Prfverfahren Teil 4-9: Umweltprfverfahren - Pneumatischer Widerstand This European Standard was approved by CENELEC on 2001-0
10、5-01. CENELEC members are bound to comply with the CENKENELEC 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 obta
11、ined on application to the Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified to the Cent
12、ral Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzer
13、land and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels O 2001 CENELEC - All rights of exploitation in any form
14、 and by any means reserved worldwide for CENELEC members. Ref. No. EN 502894-9:2001 E EN 50289-4-9:2001 -2- Foreword This European Standard was prepared by the Technical Committee CENELEC TC 46X, Communication cables. The text of the draft was submitted to the formal vote and was approved by CENELEC
15、 as EN 50289-4-9 on 2001-05-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-04-01 - latest date by which the national standards conflicting with the EN have to be w
16、ithdrawn (dow) 2004-04-01 This European Standard has been prepared under the European Mandate W212 given to CENELEC by the European Commission and the European Free Trade Association. -3- EN 50289-4-9: 200 1 Contents 1 Scope 4 2 Normative references 4 3 Definitions . 4 4 Test method 4 4.1 Equipment
17、4 4.2 Test sample . 4 4.3 Procedure 4 5 Requirements 5 Details to be specified 5 5.1 6 Test report 5 EN 50289-4-9:2001 -4- 1 Scope This Part 4-9 of EN 50289 details the method of test to determine the pneumatic resistance used in analogue and digital communication systems. This test only applies to
18、cables which are protected by gas pressurisation. It is to be read in conjunction with Part 4-1 of EN 50289, which contains essential provisions for its application. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These no
19、rmative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated re
20、ferences, the latest edition of the publication referred to applies (including amendments). EN 50289-4-1 2001 Communication cables - Specifications for tests methods - Part 4-1 : Environmental test methods - General requirements EN 50290-1 -2) Communication cables - Part 1-2: Definitions 3 Definitio
21、ns For the purposes of this European Standard, the definitions of EN 50290-1-2 apply. 4 Test method 4.1 Equipment Pneumatic equipment to supply a regulated pressure of air to the sample, flow-meter, barometer and thermometer. 4.2 Test sample The sample of finished cable having a sufficient length to
22、 carry out the test specified. 4.3 Procedure The ambient temperature and barometric pressure shall be measured. A length of finished cable shall have one end connected to a steady state flow of dry air supplied by a pressure regulated source providing air with a dryness of 5 % RH or better at 20 OC.
23、 The other end of the cable shall be open to the atmosphere. “At draft stage. -5- EN 50289-4-9:2001 The pressure applied across the cable shall be 62 kPa f 2 % and the steady state air flow shall be recorded using a flow-meter calibrated to rt 10 %. Other pressures may be applied in accordance with
24、particular user requirements and specified in the Detail specification. Only those air paths which access the interior of the sheath shall be used in the measurement. A second measurement shall be made with the air flow direction reversed and the results shall be recorded separately. The pneumatic r
25、esistance is derived from : kPa x m3/s x m 3 720 Pneumatic resistance =- f XL where L = the sample length (m), f = the flow (m3/s). 5 Requirements The pneumatic resistance shall comply with the maximum value given in the detail specification. 5.1 Details to be specified The detail specification shal
26、l mention - maximum pneumatic resistance, - sample length, - pressure, if different from 62 kPa. 6 Testreport The test report shall include - test conditions, - test temperature, - pneumatic resistance, - pasclfail criteria. BS EN 50289-4-9:200 1 BSI 389 Chiswick High Road London W4 4AL BSI is the i
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