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1、BRITISH STANDARD BS 9031:1971 Incorporating Amendment Nos. 1 and 2 Rules for the preparation of detail specifications for pulsed fixed-frequency magnetrons of assessed quality UDC 621.385.64 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:29:16 GMT+00:00 2006
2、, Uncontrolled Copy, (c) BSI BS 9031:1971 This British Standard, having been approved by the Telecommunication Industry Standards Committee, was published under the authority of the Executive Board on 30 July 1971 BSI 01-2000 The following BSI references relate to the work on this standard: Committe
3、e reference TLE/5/7 Draft for comment 70/2762 ISBN 0 580 06993 1 Co-operating organizations The Telecommunication Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industr
4、ial organizations: British Broadcasting Corporation British Electrical and Allied Manufacturers Association British Radio Equipment Manufacturers Association British Radio Valve Manufacturers Association* British Railways Board Cable and Wireless Ltd. Crown Agents for Oversea Governments and Adminis
5、trations Department of Employment and Productivity (H.M. Factory Inspectorate) Electrical Contractors Association (Incorporated) Electrical Research Association Electricity Council, the Central Electricity Generating Board and the Area Boards in England and Wales Electronic Engineering Association*
6、Electronic Valve and Semi-Conductor Manufacturers Association Institution of Electrical Engineers Institution of Electronic and Radio Engineers* Institution of Production Engineers Ministry of Defence Ministry of Defence, Army Department Ministry of Defence, Navy Department* Ministry of Technology*
7、Post Office* Radio and Electronic Component Manufacturers Federation Relay Services Association of Great Britain Science Research Council Radio and Space Research Station Scientific Instrument Manufacturers Association Society of British Aerospace Companies Ltd. Telecommunication Engineering and Man
8、ufacturing Association The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: United Kingdom Atomic Energy Autho
9、rity. Amendments issued since publication Amd. No.Date of issueComments 1131March 1973 1727April 1975Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:29:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9031:1971 BSI 01-200
10、0i Contents Page Co-operating organizationsInside front cover 1Introduction1 2Scope1 3General1 Appendix A Endurance test procedure11 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:29:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9031:1971 ii BSI 01-2000 A
11、 British Standard does not purport to include all 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. Summary of pages This document comprises a
12、 front cover, an inside front cover, pages i and ii, pages 1 to 11 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. Licensed Copy: London South Bank University, Lon
13、don South Bank University, Fri Dec 08 02:29:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9031:1971 BSI 01-20001 1 Introduction This British Standard shall be used in conjunction with BS 9030:1971, “Magnetrons of assessed quality: generic data and methods of test”. The object of the rules in this
14、 standard is to ensure that all detail specifications for pulsed magnetrons are closely similar to enable them to be readily compared. 2 Scope This standard lists the ratings, characteristics, inspection requirements and additional information for pulsed fixed-frequency magnetrons of the general app
15、lication category which shall be included as minimum mandatory requirements in the detail specification, together with supplementary tests which may be called up at the discretion of the specification writer to meet particular circumstances. The purpose of a detail specification is to describe fully
16、 a particular component so that the specification can be used contractually for procurement of that component, for acceptance testing and for circuit design and equipment maintenance purposes. 3 General Detail specifications are prepared either by BSI or by manufacturers. They shall be prepared in a
17、ccordance with the rules given in 3.1, 3.2, 3.3 and 3.4. The minimum information which is to be given in a detail specification for a pulsed fixed-frequency magnetron is given in the mandatory layout of this standard. All detail specifications shall be printed on A4 size paper conforming to the requ
18、irements of BS 4000. 3.1 Basic information. The information given in 3.1.1 to 3.1.9 shall appear on the front page of the detail specification, as far as is practicable. This information is not for inspection purposes; inspection requirements are given in 3.2. 3.1.1 Originator of the specification.
19、Each detail specification shall give the name and address of the originator of the specification. 3.1.2 Numbering of the detail specification. Each detail specification shall carry a distinguishing number made up of the number of this standard followed by a three-digit number to designate the partic
20、ular detail specification. Where the detail specifications have been prepared by BSI the two portions of the distinguishing number shall be separated by the letter “N”, e.g. BS 9031 NXXX. When the detail specification is prepared by a manufacturer BSI will issue an “EP” number, e.g. EP 9031 FXXX whi
21、ch shall be used until such time as the qualification approval test report has been received by BSI, who will then issue a BS number which will be separated by the letter “F”, e.g. BS 9031 FXXX, to show that the detail specification has been prepared by a manufacturer. The issue number and date of i
22、ssue (month and year) of the detail specification shall be given and re-issues shall give the issue number and date of issue of the superseded document, all changes being clearly marked. 3.1.3 Description of the tube and intended application. This shall be as shown on the first page of the mandatory
23、 layout for a detail specification. 3.1.4 Outline drawing (not for inspection purposes). An illustration of the component showing the overall dimensions shall be given as an aid to easy recognition and for comparison of the component with other components. Terminal connections shall be given as appr
24、opriate. The symbols used shall be in accordance with the relevant British Standards or IEC Publications. The location of the inspection drawings (see 3.3) shall be given. 3.1.5 Ratings (not for inspection purposes). Any limiting conditions of use, e.g. mounting, shall be stated. The absolute system
25、 of ratings shall be used (see IEC Publication 134). The ratings listed on the first page of the mandatory layout shall be stated. Additional ratings may be included at the manufacturers discretion but in all cases the values of the ratings and the conditions under which the ratings apply shall be g
26、iven. Any interdependence of the ratings shall be given. 3.1.5.1 Ratings (limiting values). These are defined as ratings which establish either a limiting capability or a limiting condition of use beyond which significant performance deterioration, life reduction and/or possible damage to the device
27、 may occur. NOTEThe limiting value may be either a maximum or a minimum quantity and is referred to as a “maximum rating” or a “minimum rating” respectively. Such values do not necessarily define a frontier where one side gives satisfactory performance and the other immediate failure. Licensed Copy:
28、 London South Bank University, London South Bank University, Fri Dec 08 02:29:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9031:1971 2 BSI 01-2000 3.1.6 Characteristics (not for inspection purposes). The characteristics to be stated are shown in the mandatory layout given in this standard. Addit
29、ional characteristics may be included at the manufacturers discretion but in all cases the conditions under which the characteristics are measured shall be stated. 3.1.7 Related documents. Reference shall be made to BS 9000, “General requirements for electronic components of assessed quality”, BS 90
30、30, “Magnetrons of assessed quality: generic data and methods of test” and to any other British Standards or IEC Publications which are called up in the detail specification but not already referenced in BS 9030. 3.1.8 Additional information. This part of the detail specification shall include any c
31、ircuit diagrams, graphs and notes necessary to clarify any part of the detail specification. Also where any items such as those listed below are not fully defined in BS 9030 (and/or BS 9000 in some cases) additional details covering those items shall be given in the detail specification. 1) Terms an
32、d definitions. 2) Letter symbols. 3) Test procedures. The general principles contained in the relevant British Standards and/or IEC Publications shall be followed when preparing such additional information. 3.1.8.1 Application data. The application data shall be that which, in the view of the manufa
33、cturer, will provide adequate user information. This information shall be given on a voluntary basis and is not a mandatory requirement in the sense of forming part of the inspection procedure to meet the needs of the detail specification. 3.1.9 Ordering information. The minimum ordering information
34、 required for components covered by the detail specification shall be given as shown in the mandatory layout. 3.2 Inspection requirements. This clause should be read in conjunction with 2.6 of BS 9000. This standard prescribes the complete schedule of tests, to be included in the detail specificatio
35、n, necessary to assess the declared characteristics of the component (or range of components) which shall be carried out regularly at intervals of time not exceeding three years, the time interval relevant to each test being given. Only those tests and measurements which are listed shall be used for
36、 the co-ordination of detail specifications. However, a manufacturer may specify at his discretion additional tests and measurements (see 3.2.5) tightened inspection levels and acceptable quality levels, more severe environmental severities and increased durations. The requirements for tests and mea
37、surements are given under the following headings: 1) The tests and measurements to be performed, with the letter symbol where appropriate, and with the applicable inspection levels and acceptable quality levels (taken from the levels listed in BS 9001). 2) The reference number for the test procedure
38、s, as given in BS 9030. 3) The test conditions of voltage, current, frequency, temperature, etc., as appropriate, and in accordance with the referenced test procedure as given in BS 9030. 4) The units of measurements. 5) The acceptance limits. The general test conditions may be given in a table prec
39、eding the acceptance test requirements. Where the test to be performed is in the nature of a mechanical, environmental or electrical stress, the measurements or tests to be made to determine the ability of the component to withstand the stress are specified. Usually, the post-stress requirements inc
40、lude one or more of the tests required to verify the description of the component. The post-conditioning test limits are to be specified. Where a specific test procedure is not included in BS 9030 a full description of the procedure to be followed shall be given in the detail specification. The deta
41、il specification shall show the order in which the tests or conditioning in a subgroup shall be carried out where this order may affect the test results. It will be necessary or the detail specification to indicate wherever any particular order of testing in any subgroup shall be observed. Licensed
42、Copy: London South Bank University, London South Bank University, Fri Dec 08 02:29:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9031:1971 BSI 01-20003 Where a subgroup contains a “destructive” test this shall either be stated in full or the symbol “(D)” shall be placed alongside the title of the
43、 subgroup in the schedule of inspection requirements in the detail specification. Such detail specifications shall contain the following footnote: “Samples subjected to tests marked “destructive” or “(D)” shall not be accepted for release under BS 9000 (see 2.6.5 of BS 9000)”. 3.2.1 Group A inspecti
44、on. This group, consists of non-destructive short-duration electrical and mechanical test procedures which are employed to assess on a lot-by-lot basis the principal characteristics of tubes covered by the detail specification. It is divided into subgroups as follows: 3.2.2 Group B inspection. This
45、group consists of tests which assess on a lot-by-lot basis certain additional characteristics which are usually more complex and/or of longer duration than those in Group A. These characteristics are appropriate for confirmation by electrical, mechanical or environmental tests which can be carried o
46、ut in less than a week and may be of a destructive nature. It is divided into subgroups as follows: 3.2.3 Group C inspection. This group consists of tests which assess additional characteristics of a component that are appropriate for checking at intervals of three months. These tests are not intend
47、ed as lot-by-lot checks but rather as periodic confirmation that certain characteristics are being maintained and as a means of collecting information for inclusion in the CTR. It is divided into subgroups as follows: 3.2.4 Group D inspection. This group consists of the inspection and test procedure
48、s which are used to assess the remaining characteristics of the component, and which are appropriate for checking at one, two or three-year intervals. Subgroup A0. All tests required for 100 % for testing. Subgroup A1. Visual examination where this is not prescribed in other subgroups. Subgroup A2.
49、Tests which are of major importance for verifying the description of the component. Subgroup A3. Tests which are of minor importance for verifying the description of the component. Subgroup A4. Tests which assess the electrical characteristics which are of a design nature. Subgroup A5. Measurements which are to be presented in the CTR. Subgroup B1. Tests which assess the interchangeability of the component. Subgroup B2. Tests which are intended to simulate assembly procedures and to assess their effect upon the component during storage and transport with the component as
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