1、BRITISH STANDARD BS EN 112000:1997 Incorporating Amendment No. 1to BS CECC 12000:1981 and implementing Amendment No. 2 to BS CECC 12000:1981 (renumbers BS as BSEN 112000:1997), not published separately Harmonized system of quality assessment for electronic components Generic specification: Image con
2、verter and image intensifier tubes The European Standard EN 112000:1991has the status of a British Standard ICS 31.100; 31.120BSEN112000:1997 This British Standard, having been prepared under the directionof the Electronic Components Standards Committee, was published underthe authority of the Execu
3、tive Board and comes intoeffect on 31December1980 BSI 04-2000 ISBN 0 580 11758 8 Committees responsible for this British Standard The Electronic Components Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following: British Electrica
4、l and Allied Manufacturers Association (BEAMA) Electricity Supply Industry in England and Wales Electronic Components Industry Federation* Electronic Engineering Association Institution of Electronic and Radio Engineers* Ministry of Defence* National Supervising Inspectorate* Post Office Society of
5、British Aerospace Companies Limited Telecommunication Engineering and Manufacturing Association (TEMA) The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this British Standar
6、d: Scientific Instrument Manufacturers Association Services Electronic Parts Committee United Kingdom Atomic Energy Authority Amendments issued since publication Amd. No. Date of issue Comments 6008 July1992 9605 November 1997 Indicated by a sideline in the marginBSEN112000:1997 BSI 04-2000 i Conten
7、ts Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 112000 3 List of references Inside back coverBSEN112000:1997 ii BSI 04-2000 National foreword This British Standard has been prepared by Technical Committee EPL/39, and is the English language version of EN1
8、12000:1992 Harmonized system of quality assessment for electronic components Generic specification: Image converter and image intensifier tubes, including amendments1:1988, 2:1992and addendum, published by the European Committee for Electrotechnical Standardization (CENELEC) Electronic Components Co
9、mmittee (CECC). This standard gives the terminology, quality assessment procedures and test and measurement conditions applicable to the entire family of image converter and image intensifier tubes. Any sectional and blank detail specification dealing with a particular sub-family of image converter
10、and image intensifier tubes required to be used in conjunction with this standard will include those tests that are considered appropriate to the sub-family and will also give more detailed information relative to the sub-family. This standard is a harmonized specification within the CECC system. Te
11、rminology and conventions. The text of the CECC specification has been accepted as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are used, however, that are not identical with those used in British Standards; attention is especially draw
12、n to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Cross-references International Standard Corresponding British Standard ISO1000:1973 PD5686:1972 The use of SI units (Tech
13、nically equivalent) IEC68 BS2011 Basic environmental testing procedures (The relevant Parts are all identical) IEC117 BS3939 Graphical symbols for electrical power, telecommunications and electronic diagrams (Technically equivalent) IEC 410:1973 BS6001:1972 Sampling plans and procedures for inspecti
14、on by attributes (Identical) CECC00100:1974 BS E9000:1977 Specification for general requirements for electronic components of assessed quality harmonized with the CENELEC Electronic Components Committee System Part1:1977Basic rules (Technically equivalent) CECC00006:1973 BS E9006:1976 Harmonized sys
15、tem of quality assessment for electronic components. Basic specification. Environmental test procedures (Identical) CECC 00007:1973 BS E9007:1975 Harmonized system of quality assessment for electronic components. Basic specification: sampling plans and procedures for inspection by attributes (Identi
16、cal)BSEN112000:1997 BSI 04-2000 iii The related British Standards for IEC27-1:1971and IEC50are BS1991-6:1975and BS4727respectively. The technical committee has reviewed the provisions of these IEC standards and has decided that they are acceptable for use in conjunction with this standard. The follo
17、wing CENELEC documents are referred to: The text of these two documents is included in BS E9000-2: Rules of procedure. NOTETextual errors. In 2.3.1 7) and elsewhere, the symbols for quantities, e.g. C, W, B, are printed in upright instead of sloping type. Clause 3.2. In line2, after “instead of from
18、”, the words “each lot” should be inserted. Clause 4.9.3. In the last line, “the procedures of 15to” should be read as “the procedures of 15of”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct app
19、lication. Compliance with a British Standard does not of itself confer immunity from legal obligations. CECC00107:1977,Rule of Procedure7: Quality assessment procedures CECC00109:1974,Rule of Procedure9: Certified test records. Summary of pages This document comprises a front cover, an inside front
20、cover, pages i to iv, theENtitle page, pages 2to 18, 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 amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE
21、EUROPISCHE NORM EN 112000 November 1992 UDC Supersedes CECC 12000Issue 1:1980 Descriptors: Quality, electronic components, tubes English version Generic Specification: Image Converter and Image Intensifier Tubes Spcification Gnrique: Tubes convertisseurs dimage et tubes intensificateurs dimage Fachg
22、rundspezifikation: Bildwandler- und Bildverstrkerrhren This European Standard was approved by the CENELEC Electronic Components Committee (CECC) on20November1991. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Sta
23、ndard 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 Secretariat of the CECC or to any CENELEC member. This European Standard exists in three official versions
24、(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 same status as the official versions. CENELEC members are the national electrotechnical committees of
25、 Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. The membership of the CECC is identical, with the exception of the national electrotechnical committees of Greece, Iceland a
26、nd Luxembourg. CECC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1992Copyright reserved to CENELEC members Ref. No. EN 112000:1992 EEN1
27、12000:1992 BSI 04-2000 2 Preface The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the European Committee for Electrotechnical Standardization (CENELEC) who wish to take part in a harmonized System for electronic components of assessed quality. The object of
28、 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 recognized Mark, or Certificate, of Conformity. The components produced under the System are thereby accepta
29、ble in all member countries without further testing. This specification has been formally approved by the CECC, and has been prepared for those countries taking part in the system who wish to issue national harmonized specifications for Image Converter and Image Intensifier Tubes. It should be read
30、in conjunction with the current regulations for the CECC System. Foreword This specification was prepared by CECC WG11 “Electro-optical devices”. It was based, wherever possible on the Publications of the International Electrotechnical Commission (IEC). The CECC voting procedure for the conversion o
31、f publication CECC12000 Issue1:1980to EN has resulted in a positive vote. The voting report document CECC(Secretariat)2888/8.91 has been submitted for formal approval and has been accepted. The following reference documents were approved by CECC as EN112000:1992on20November1991: CECC12000Issue1:1980
32、with Amdts1, 2and Addendum. The following dates were fixed: Contents Page Foreword 2 Section 1. Scope 3 Section 2. General 3 2.1 Order of precedence 3 2.2 Related documents 3 2.3 Units, symbols and terminology 3 2.4 Marking 6 Section 3. Quality assessment procedures 6 3.1 Primary stage of manufactur
33、e 6 3.2 Structurally similar components 6 3.3 Qualification approval procedure 6 3.4 Supplementary procedure for qualification approval 7 3.5 Quality conformance inspection 7 3.6 Sampling requirements for small lots or for expensive devices 7 3.7 Re-submission of rejected lots 8 3.8 Certified test r
34、ecords 8 3.9 Delayed delivery 8 3.10 Unchecked parameters 8 3.11 Periodic Inspection 8 3.12 Release for delivery before the completion of Group B tests 8 Section 4. Test and measurement procedures 9 4.1 Alternative test methods 9 4.2 Standard conditions for testing 9 4.3 Test equipment 9 4.4 Visual
35、inspection 10 4.5 Dimensions 10 4.6 Electrical and optical test and measurement procedures 10 4.7 Mechanical test and measurement procedures 18 4.8 Environmental test and measurement procedures 18 4.9 Endurance test and measurement procedures 18 Figure 1 17 Figure 2 17 latest date of announcement of
36、 the EN atnational level (doa)1992-12-08 latest date of publication ofan identical national standard (dop)1993-06-08 latest date of withdrawal ofconflicting national standards (dow)1993-06-08EN112000:1992 BSI 04-2000 3 Section 1. Scope This document applies to image converter and image intensifier t
37、ubes of assessed quality. Section 2. General 2.1 Order of precedence Where any discrepancies occur for any reason, documents shall rank in the following order of precedence: 1) the detail specification 2) the generic specification 3) document CECC 00100or any other international (that is IEC) docume
38、nts to which reference is made. The same order of precedence shall apply to equivalent national documents. 2.2 Related documents 2.3 Units, symbols and terminology Units, graphical symbols, letter symbols and terminology shall, wherever possible, be taken from the following documents: 2.3.1 Terminol
39、ogy When using the terminology to refer to radiant quantities instead of luminous quantities, the text and units shall be modified accordingly. 2.3.1.1 image converter tube an electronic tube in which an image (usually of non-visible radiation) projected onto a photoemissive surface produces a corre
40、sponding visible image on a luminescent surface ISO1000 1973 SI units and recommendations for the use of their multiples and of certain other units IEC27 Letter symbols to be used in electrical technology IEC27-1 1971 Part1:General IEC50 International electrotechnical vocabulary IEC68 Basic environm
41、ental testing procedures (see CECC00006) IEC117 Recommended graphical symbols IEC134 1961 Rating systems for electronic tubes and valves and analogous semiconductor devices IEC306 Measurement of photosensitive devices IEC306-1 1969 Part1:Basic recommendations IEC410 1973 Sampling plans and procedure
42、s for inspection by attributes (see CECC00007) CECC00100 1974 Basic Rules CECC00006 Harmonization document for IEC68: basic environmental testing procedure. CECC00007 Harmonization document for IEC410: sampling plans and procedures for inspection by attributes CECC00107 1977 Rule of Procedure7: Qual
43、ity assessment procedures CECC00109 1974 Rule of Procedure9: Certified test records. ISO1000 1973 SI units and recommendations for the use of their multiples and of certain other units IEC27 Letter symbols to be used in electrical technology IEC117 Recommended symbols.EN112000:1992 4 BSI 04-2000 2.3
44、.1.2 image intensifier tube an electronic tube in which an image projected onto a photoemissive surface produces a corresponding intensified image on a luminescent surface 2.3.1.3 background luminance the average luminance over a specified area of the screen when the photocathode receives no radiati
45、on capable of producing a photoemissive effect 2.3.1.4 equivalent background input (E.B.I.) the uniform flux density incident upon the photocathode, parallel to the input optical axis, over a specified area and having a specified spectral distribution required to give an increase in screen luminance
46、 equal to the background luminance 2.3.1.5 luminance gain the quotient of (1) Screen luminous exitance averaged over a specified area of the screen by (2) The uniform illuminance, having a specified spectral distribution, over a specified area of the photocathode 2.3.1.6 radiance gain the quotient o
47、f (1) The screen radiant exitance, having a specified spectral distribution, averaged over a specified area of the screen by (2) The uniform irradiance, having a specified spectral distribution, over a specified area of the photocathode 2.3.1.7 contrast transfer function (C.T.F.) the variation of co
48、ntrast transfer ratio with input spatial frequency. The contrast transfer ratio of an image tube is the contrast of the image formed on the output screen by a parallel bar pattern with square-wave modulation at a stated spatial frequency of radiation flux density on the input photocathode contrast (
49、C) is computed by: where W is the average maximum flux density and B is the average minimum flux density in the image 2.3.1.8 colour the colour of the display shall be defined in accordance with the Kelly chart shown below:EN112000:1992 BSI 04-2000 5 2.3.1.9 persistence of display time to decay to10% of initialpeakvalue Description Less than14s Very short 1 4s to104s Short 104s to1 0004s Medium short 1ms to100ms Medium 100ms to1s Long More than1s Very longEN112000:1992 6 BSI 04-2000 2.3.1.10 bar pattern an optical pattern consistin
