BS EN 60068-2-13-1999 Environmental testing - Test methods - Tests - Test M Low air pressure《环境试验 试验方法 试验 试验M 低气压》.pdf

1、STD*BSI BS EN bOb8-2-13-ENGL 1999 m 1b24bb9 0792894 758 m BRITISH STANDARD BS EN 60068-2-13: 1999 IEC 60068-2-13: 1983 Environmental testing - Part 2: Tests - Test M: Low air pressure The European Stanard EN 600682-131999 has the status of a British Standard ICs 19.040 O 9 111 NO COPYING WITHOUT BSI

2、 PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN b0066-2-3-ENGL 1999 LbZ4bb9 0792892 694 I direction of the Electrotechnicai Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 1999 Amd. No. O BSI 09-1999 BS EN 60068-2-13

3、:1999 Date Comments National foreword This British Standard is the English language version of EN 600682-131999. It is identical with IEC 600682-131983. It supersedes BS 2011:Part 2.1 M1984 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEU104, Envir

4、onmental conditions, classification and testing, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible intermtionaVEumpean committee any enquiries on the interpretation, or proposais for change, and keep the UK interests informed; - monitor related int

5、ernational and European developments and promulgate themintheUK. A list of organizatiom represented on this committee can be obtained on request to its secretary. From 1 January 1997, ali IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IE

6、C 60027-1. For a period of lime during the change over from one numbering system to the other, publications may contain identifiers from both systms. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to intematio

7、nal publicaiions with their corresponding European publications. The British Stankds which implement international 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 t

8、he “Find“ faciity of the BSI Stankds Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards ase responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from l

9、egal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice dispiayed in this document indicates when the document was last issued. ISBN O 580 32946 3 STD-BSI BS EN b

10、OOb8-2-13-ENGL 1979 1b24bb7 0792893 520 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60068-2-1 3 April 1999 ICs 19.040 Supersedes HD 323.2.1 3 S1:1987 English version Environmental testing Part 2: Tests - Test M: Low air pressure (IEC 60068-2-1 3: 1983) Essais denvironnement Partie 2: Essais

11、 - Essai M: Basse pression atmosphrique (CE1 60068-2-1 31983) Umweltprfungen Teil 2: Prfungen - Prfgruppe M: Niedriger Luftdruck (IEC 60068-2-1 3: 1983) This European Standard was approved by CENELEC on 1999-04-01. CENELEC members are bound to comply with the CENICENELEC Internal Regulations which s

12、tipulate 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 CENELEC member. This European Sta

13、ndard 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 Central Secretariat has the same status as the official versions. CENELEC members are the nati

14、onal electrotechnicai committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Eu

15、ropen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 1999 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-1 3:1999 E STDnBSI BS

16、 EN bOOb8-2-13-ENGL 1777 1624667 0772874 467 5 Page 2 EN 60068-2-13:1999 Foreword The text of the International Standard IEC 60068-2-1 3:1983, prepared by SC 508 (transformed into IEC TC 1 04 “Environmental conditions, classification and methods of test), was approved by CENELEC as HD 323.2.13 S1 on

17、 1986-02-27. This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN 60068-2-1 3 on 1999-04-01. The following date was fixed: - latest date by which the EN has to be implemented at national level by publication of an iden

18、tical national standard or by endorsement (dop) 2000-04-0 1 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 60068-2-1 3:1983 was approved by

19、 CENELEC as a European Standard without any modification. Page 3 EN 60068-2-13:1999 CONTENTS 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. General description . . . . . . 4 3. Description of te

20、st apparatus . . . . . . . . . . . . . . . . . . . 4 5 4. Severities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. Re-conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6. Initial measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7. Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8. Recovery . . . . . . . . . . . . . . . . . . 6 9. Finai measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . 6 10. Information to be &en in the relevant specificatio

23、n . . . . . . . . . . . . . . . . . . . . . . . . . 7 a Annex ZA (normative) Normative references to international publications with their corresponding European publications . . . . . . . . . . O BSI 09-1 999 BASIC ENVIRONMENTAL TESTING PROCEDURES Part 2: Tests-Test M: Low air pressure . 1. Introdu

24、ction 1.1 Generd This standard deals with low pressure tests at room temperature. The object of this test is to determine the ability of components, equipment or other articles to be stored, transported or used under low air pressure conditions. Note. - Articles to be stored, transported or used und

25、er a simultaneous combination of high or low temperature and low air pressure should, where the combination is important for the stresses imposed on the article or for the failure mechanisms, be tested according to: - IEC Publication 68-2-40: Basic Environmental Testing Procedures, Part 2: Tests -Te

26、st Z/AM: - IEC Publication 68-2-41: Pa. 2: Tests-Test Z/BM: Combined Dry Heat/Low Air Pressure Tests. Combined Cold/Low Air Pressure Tests, and 1.2 Related document Publication 68-1 : Basic Environmental Testing Procedures, Part i : General and Guidance. 2. General description The specimen is introd

27、uced into the test chamber, the chamber air pressure is then reduced to the appropriate value specified in the relevant specification. These conditions are maintained for the specified duration. 3. Description of test apparatus The test chamber shall be capable of maintaining the air pressure condit

28、ions given in Care shall be taken to avoid air contamination by ancillary equipment and devices and Clause 4. by the air introduced when pressure is restored to normal. When heat-dissipating specimens are tested, the relevant specification may prescribe requirements applicable to the test chamber in

29、 accordance with Test Z/BM. STDaBSI BS EN bUOb8-2-13-ENGL 1999 Lb24bb9 0792897 176 II (kW (mbar) I 10 2 20 4 40 8 80 15 150 25 250 40 400 55 550 70 700 84 840 Page 5 EN 60068-2-13:1999 (from IS0 Standard 2533) (m) 31 200 26 600 22 100 I7 600 I3 600 IO 400 7 200 4 850 3000 (Note 2) 4. Severities The

30、severities, as indicated by air pressure and duration of exposure, shall be specified in the relevant specification. The values shall preferably be selected from those given in Sub-clauses 4.1 and 4.2. 4.1 Air pressure It shall be possible to maintain the following pressures in the chamber with a to

31、lerance of fS% or fO.l kPa whichever is the larger. The tolerance on the 84 kPa severity shall be f2 kPa. I Approximate altitude above sea level Air pressure 1 Nores I. - Altitudes up to 1 O00 m are covered by the standard air pressure of 86 kPa to 106 kPa. 2. - Applicable when it is required to tes

32、t specimen at the lower limit of the air pressure value of the standard atmospheric conditions for testing. 4.2 Duration of exposure The relevant specification should select one of the following durations: - 5 min - 30 min -2h -4h - 16 h 5. Pre-conditioning The relevant specification may call for pr

33、e-conditioning, STDmBSI BS EN bOOb8-2-13-ENGL 1999 H Lb24bb9 0792898 002 Page 6 EN 60068-2-13:1999 6. Initial measurements The specimen shall be visually inspected and electrically and mechanically checked as required by the relevant specification. 7. Conditioning 7.1 7.2 7.3 7.4 7.5 The chamber sha

34、ll be within the temperature range specified by conditions for testing. For non-operational tests, the specimen shall be introduced unpacked, switched-off, “ready for use” state, in its normal specified. The pressure within the chamber shall then be reduced to the the standard atmospheric into the c

35、hamber in an position or as otherwise value appropriate to the severity. The relevant specification may limit the rate of change of pressure to not more than 10 kPa/min when considered necessary. When operational tests are required, the specimen shall be switched on or be electrically loaded. Checks

36、 shall be made to ascertain whether the specimen is capable of functioning in accordance with the relevant specification. The specimen may remain under operating conditions for the specified duration, or be switched off as prescribed in the relevant specification. If required by the relevant specifi

37、cation, intermediate measurements shall be performed. For heat-dissipating specimens, the relevant specification may require that the specimen is switched on and adequate time allowed for it, to reach thermal stability before or after the air pressure is reduced and functional tests and/or measureme

38、nts are made. The air pressure shall be maintained for the specified duration. The. air pressure shall be restored to normal. If required by the relevant specification, the rate of change of air pressure shall not exceed 10 kPa/min. 8. Recovery The specimen, if not otherwise specified in the relevan

39、t specification, shall remain under standard atmospheric conditions for testing for not less than 1 h nor more than 2 h. 9. Final measurements The specimen shall be visually inspected and electrically and mechanically checked as required by the relevant specification. STD*BSI BS EN bOObB-Z-L3-ENGL L

40、999 = Lb24bb9 0792899 T49 m Page 7 EN 60068-2-13:1999 10. Information to be given in the relevant specification When this test is included in the relevant specification, the following details shall be given as far as they are applicable: Clause or sub-clause a) he-conditioning b) Initial measurement

41、s c) State of specimen during conditioning d) Severity: pressure and duration of exposure e) Limitation to be applied to rate of change of pressure fl Checks, temperature stability, measurements and/or loading g) Recovery h) Final measurements during the conditioning period 5 6 7.3 4 7.2 and/or 7.5

42、7.1 or 7.3 8 9 Page 8 EN 60068-2-13:1999 Annex ZA (normative) Normative references to international publications with their corresponding European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited

43、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 references the latest edition o

44、f the publication referred to applies (including amendments). NOTE: When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Year Publication - IEC 60068-2-40 1976 IEC 60068-2-41 1976 IS0 2533 1975 Year Basic environmental testing p

45、rocedures HD 323.2.40 Slit 1988 Part 2: Tests - Test Z/AM: Combined cold/low air pressure tests - Title EN/HD - Part 2: Tests - Test Z/BM: Combined dry heat/iow air pressure tests HD 323.2.41 S1” 1988 Standard atmosphere 1) HD 323.2.40 S1 includes Al:1983 to IEC 60068-2-40. 2) HD 323.2.41 S1 include

46、s Al :I 983 to IEC 60068-2-41. STDOBSI BS EN bOOb8-2-33-ENGL BS EN 60068-2-13:1999 IEC 60068-2-13:1983 BSI 389 Chiswick High Road London w4 4AL 3999 m 1624bb9 0772903 427 9 BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presen

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