1、BRITISH STANDARD BS EN 134000:1995 Harmonized system of quality assessment for electronic components Generic Specification Variable capacitors (Qualification approval and capability approval) The European Standard EN134000:1994 has the status of a BritishStandardBSEN 134000:1995 This BritishStandard
2、, having been prepared under the directionof the ElectrotechnicalSector Board,was published under theauthority of the StandardsBoard and comes intoeffect on 15December1995 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference EPL/40 Draft announced in BSI N
3、ews February1995 ISBN 0 580 24872 0 Committees responsible for this British Standard The preparation of this BritishStandard was entrusted to Technical Committee EPL/40, Capacitors and resistors for electronic equipment, upon which the following bodies were represented: Federation of the Electronics
4、 Industry Ministry of Defence National Supervising Inspectorate (BSI PC) The following bodies were also represented in the drafting of the standard, through sub-committees and panels BEAMA Ltd. BSI Testing Services Amendments issued since publication Amd. No. Date CommentsBSEN 134000:1995 BSI 01-200
5、0 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN134000 5 List of references Inside back coverBSEN 134000:1995 ii BSI 01-2000 National foreword This BritishStandard has been prepared by Technical Committee EPL/40 and is the English language versio
6、n of EN134000:1994, Generic specification: Variable capacitors (Qualification approval and capability approval) published by the European Committee for Electrotechnical Standardization (CENELEC) Electronic Components Committee (CECC). Cross-references Publication referred to Corresponding British St
7、andard EN100114-I:1993 BS EN100114 Rule of Procedure14. Quality assessment procedures. Part1:1994 Approval of manufacturers and other organizations CECC00014:1988 (EN100014:1992) BS EN100014:1992 Harmonized system of quality assessment for electronic components. Basic specification: CECC assessed pr
8、ocess average procedure(60% confidence limit) BS CECC00114 Rule of procedure14. Quality assessment procedures. CECC00114-II:1994 Part2:1995 Qualification approval of electronic components CECC00114-III:1993 Part3:1993 Capability approval of an electronic component manufacturing activity ISO3:1973 IS
9、O497:1973 BS2045:1965 Preferred numbers IEC50 BS4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms IEC62:1992 BS EN60062:1994 Marking codes for resistors and capacitors IEC63:1963 BS2488:1966 Schedule of preferred numbers for the resistance of resisto
10、rs and capacitance of capacitors for telecommunication equipment IEC68 BS2011 Environmental testing IEC68-1:1988 Part1.1:1989 General and guidance BS EN60068: Environmental testing EN60068-2-1:1993 (IEC68-2-1:1990) BS EN60068-2-1:1993 Tests A. Cold EN60068-2-2:1993 (IEC68-2-2:1974) BS EN60068-2-2:19
11、93 Tests B. Dry heat BS2011 Environmental testing IEC68-2-3:1969 Part2.1Ca:1977 Test Ca. Damp heat, steady state IEC68-2-6:1970 Part2.1Fc:1983 Test Fc. Vibration (sinusoidal) IEC68-2-13:1983 Part2.1M:1984 Test M. Low air pressure IEC68-2-14:1974 Part2.1N:1985 Test N. Change of temperature IEC68-2-20
12、:1979 Part2.1T:1981 Test T. Soldering IEC68-2-21:1985 Part2.1U:1984 Test U. Robustness of terminations and integral mounting devices BS EN60068 Environmental testing EN60068-2-27:1993 (IEC68-2-27:1978) EN60068-2-29:1993 (IEC68-2-29:1988) BS EN60068-2-27:1993 Environmental testing procedures. Tests.
13、Test Ea and guidance. Shock BS EN60068-2-29:1993 Environmental testing procedures. Tests. Test Eb and guidance. Bump BSEN 134000:1995 BSI 01-2000 iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correc
14、t application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Publication referred to Corresponding British Standard IEC68-2-30:1980 BS2011 Environmental testing Part2.1Db:1981 Test Db and guidance : Damp heat, cyclic(12+12hour cycle) BS EN60068 Environ
15、mental testing EN60068-2-45:1992 (IEC68-2-45:1980) BS EN60068-2-45:1993 Environmental testing. Tests. Test XA and guidance. Immersion in cleaning solvents IEC418 BS5786 Variable capacitors Part1:1979 Methods of test IEC617 BS3939 Graphical symbols for electrical power, telecommunications and electro
16、nics diagrams Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, the EN title page, pages2 to22, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the
17、 amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN134000 June1994 Descriptors: Quality, electronic components, capacitors English version Generic specification: Variable capacitors (Qualification approval and capability approval) Spcification gnri
18、que: Condensateurs variables (Homologation et agrment de savoir-faire) Fachgrundspezifikation: Einstellbare Kondensatoren (Bauartanerkennung und Befhigungsanerkennung) This European Standard was approved by the CENELEC Electronic Committee (CECC) on29July1993. CENELEC members are bound to comply wit
19、h the CEN/CENELEC 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 General Secretari
20、at of the CECC 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 CECC General Secretariat has the sam
21、e status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. The membership of the CEC
22、C is identical, with the exception of the national electrotechnical committees of Greece, Iceland and Luxembourg. CECC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de
23、Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN134000:1994 EEN 134000:1994 BSI 01-2000 2 Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the European Committee for Electrotechnical Standardization (CENELEC) who
24、wish to take part in a harmonized system for electronic components of assessed quality. The object of the system is to facilitate international trade by the harmonization of the specifications and quality assessment procedures for electronic components, and by the grant of an internationally recogni
25、zed mark, or certificate, of conformity. The components produced under the system are thereby acceptable in all member countries without further testing. This European Standard was prepared by CECCWG3, Capacitors. The text of the draft based on document CECC(Sec)3095 was submitted to the formal vote
26、; together with the voting report, circulated as document CECC(Sec)3376, it was approved by CECC as EN134000 on29July1993. This votingreport also covers document CECCWG3(Hayward)2E/02.93. At its meeting in Nuremberg in May1993 CECCWG3 decided to use for publication document CECC WG3(Hayward)2E, a re
27、vision of CECC(Sec)3095, wherein Section3 had been changed in view of the capability approval procedure according to EN130000. It should be published without voting because the former document had been closed with positive votes only(see minutes of the mentioned meeting CECCWG3(Sec)255item8.2). The
28、text of EN134000 is based on the following documents: CECC CECC(Sec)3095/03.92 RV CECC(Sec)3376/06.93 and CECC WG3(Hayward)2E/02.93 RV CECC(Sec)3376/06.93. The following dates were fixed: Contents Page Foreword 2 1 Scope 5 2 General 5 2.1 Order of precedence 5 2.2 Related documents 5 2.3 Units and s
29、ymbols 6 2.4 Terminology 6 2.5 Marking 9 3 Quality assessment procedures 9 3.1 General 9 3.2 Primary stage of manufacture 10 3.3 Subcontracting 10 3.4 Structurally similar components 10 3.5 Qualification approval procedures 10 3.6 Capability approval procedures 11 3.7 Rework and repair work 11 3.8 R
30、elease for delivery 11 3.9 Certified test records of released lots 12 3.10 CECC Assessed Process Average procedure (APA) 12 3.11 Delayed delivery 12 3.12 Alternative test methods 12 3.13 Manufacture outside the geographical limits of CECC supervising inspectorates 12 4 Test and measurement procedure
31、s 12 4.1 General 12 4.2 Standard atmospheric conditions 13 4.3 Drying 14 4.4 Visual examination and check of dimensions 14 4.5 Electrical tests 14 4.6 Operating torque 16 4.7 Locking 16 4.8 Locking torque proof 17 4.9 End stop torque 17 4.10 Thrust and pull (axial) 17 4.11 Side thrust 17 4.12 Robust
32、ness of terminations and integral mounting devices 17 4.13 Solderability 18 4.14 Resistance to soldering heat 18 4.15 Component solvent resistance 18 latest date of announcement of the EN atnational level (doa)1993-11-30 latest date of publication ofan identical national standard (dop)1994-05-31 lat
33、est declaration of NS obsolescence 1994-05-31 latest date of withdrawal ofconflicting national standards (dow)2003-11-30EN134000:1994 BSI 01-2000 3 Page 4.16 Solvent resistance of marking 18 4.17 Rapid change of temperature 18 4.18 Vibration 19 4.19 Bump 19 4.20 Shock 19 4.21 Climatic sequence 19 4.
34、22 Damp heat, steady state 20 4.23 Electrical endurance 20 4.24 Mechanical endurance 20 Annex A (normative) Interpretation of sampling plans and procedures as described in IEC410 21 Annex B (informative) Quality factor 22 Table 1 Standard atmospheric conditions for referee purpose 13 Table 2 16 Tabl
35、e 3 204 blankEN134000:1994 BSI 01-2000 5 1 Scope This specification is applicable to variable capacitors of the following types for use in electronic equipment: a) Variable tuning capacitors b) Trimmer capacitors c) Preset capacitors It establishes standard terms, inspection procedures and methods o
36、f test for use in sectional and detail specifications within the CECC System for electronic components. 2 General 2.1 Order of precedence Where any discrepancies occur for any reason, documents shall rank in the following order of precedence: the detail specification the sectional specification the
37、generic specification the FEN internal regulations any other international documents (for example of the IEC) to which reference is made The same order of precedence shall apply to equivalent national documents. 2.2 Related documents EN100114-I (1994) Approval of manufacturers and other organization
38、s (with amendment1) Issue2(1991) Internal Regulations of the FEN e.V. (supersedes CECC00100Issue21988) CECC00014 (1986) CECC Assessed Process Average Procedure (APA) CECC00114-II (1992) Qualification approval of electronic components (with amendment1) CECC00114-III (1993) Capability approval of an e
39、lectronic component manufacturing activity (with amendment and erratum) ECQAC1220 (1992) ECQAC Policy on Uncertainty of Measurement ISO3 (1973) Preferred numbers Series of preferred numbers ISO497 (1973) Guide to the choice of series of preferred numbers and of series containing more rounded values
40、of preferred numbers ISO1000 (1973) SI units and recommendations for the use of their multiples and of certain other units IEC27-1 (1971) Letter symbols to be used in electrical technology: Part1 General IEC50 International Electrotechnical Vocabulary IEC62 (1992) Marking codes for resistors and cap
41、acitors IEC63 (1963) Preferred number series for resistors and capacitors IEC68 Basic environment testing procedure IEC68-1 (1988) General IEC68-2-1 (1974) 68-2-1A (1976) Test A: Cold First supplement IEC68-2-2 (1974) 68-2-2A (1976) Test B: Dry Heat First supplement IEC68-2-3 (1969) Test Ca: Damp He
42、at, steady state IEC68-2-6 (1970) Amendment1(1972) Amendment2(1985) Test Fc: Vibration (sinusoidal) IEC68-2-13 (1983) Test M: Low air pressureEN 134000:1994 6 BSI 01-2000 2.3 Units and symbols Units, graphical symbols, letter symbols and terminology will whenever possible be taken from the following
43、 publications: ISO1000, IEC27, IEC50, IEC617. When further items are required they shall be derived in accordance with the principles of the documents listed above. 2.4 Terminology For the purpose of this standard the following definitions apply: 2.4.1 variable capacitor a capacitor which is designe
44、d to enable its capacitance to be varied continuously over its complete range 2.4.2 differential capacitor a capacitor comprising two isolated stators which function with one rotor, arranged so that as the capacitance between the rotor and one stator increases, the capacitance between the rotor and
45、the other stator decreases; but the sum of the two capacitance values remains substantially constant for all settings 2.4.3 split stator capacitor a capacitor comprising two isolated stators which function in series with a common rotor 2.4.4 section a stator and its corresponding rotor/moving electr
46、ode 2.4.5 multi-section capacitor a capacitor which has several sections, the capacitance value of which are varied simultaneously by a common actuating device 2.4.6 reference section that section to which other sections can be matched 2.4.7 matching section a section matched to a reference section
47、IEC68-2-14 (1974) Amendment1(1986) Test N: Change of temperature IEC68-2-20 (1979) Amendment1(1986) Amendment2(1987) Test T: Soldering IEC68-2-21 (1975) Amendment1(1985) Test U: Robustness of terminations and integral mounting devices IEC68-2-27 (1972) Test Ea: Shock IEC68-2-29 (1968) Test Eb: Bump
48、IEC68-2-30 (1980) Amendment1(1985) Test Db: Damp heat, cyclic IEC68-2-45 (1980) Test XA and guidance. Immersion in Cleaning Solvents Amendment No.1(1993) IEC410 (1973) Sampling plans and procedures for inspection by attributes IEC418 Variable Capacitors IEC617 Recommended graphical symbols NOTEThe a
49、bove references apply to the current editions, except for IEC68 for which the referenced edition shall be used.EN134000:1994 BSI 01-2000 7 2.4.8 type (function) capacitors of one type comprise those having similar design features exclusive of mounting accessories NOTEThe segregation of capacitors into types is determined by the function and is governed by the ability of the capacitor to withstand various severities of mechanical endurance. 1) Type A Tuner capacitor A variable capacitor whose activating device is intended to
