1、BRITISH STANDARD BS9753:1986 Incorporating Amendment No. 1 Sectional specification for variable r.f. type inductors of assessed quality for use in electronic equipment for capability approval UDC621.318.43BS9753:1986 This BritishStandard, having been prepared under the directionof the Electronic Com
2、ponents Standards Committee, was published underthe authority of the BoardofBSI and comesinto effecton 30 April1986 BSI01-2000 First published December1982 First revision April1986 The following BSI references relate to the work on this standard: Committee reference ECL/18 Draft for comment85/24631D
3、C ISBN 0 580 15108 5 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted by the Electronic Components Standards Committee (ECL/-) to Technical Committee ECL/18 upon which the following bodies were represented: Electronic Components Industry Federatio
4、n Engineering Equipment and Materials Users Association Ministry of Defence National Supervising Inspectorate Telecommunications Engineering and Manufacturing Association (TEMA) UnitedKingdom Atomic Energy Authority Amendments issued since publication Amd. No. Date of issue Comments 5414 July1986 In
5、dicated by a sideline in the marginBS9753:1986 BSI 01-2000 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Related documents 1 3 Preparation of the detail specification 1 4 Inspection requirements to be listed in the detail specification 2 5 Detail specification 2BS
6、9753:1986 ii BSI 01-2000 Foreword This revised BritishStandard has been prepared under the direction of the Electronic Components Standards Committee. It is intended to be used for the preparation of detail specifications for variable r.f. type inductors released under the terms of the BS9000/BS9720
7、 capability approval procedure. In this edition the format of the blank detail specification has been simplified and the recommended test schedule, modified, to accord with the experience gained in operating the procedure since the first edition, and clear guidance is given on the suitable test insp
8、ection levels. Changes brought about by the revision of BS9720 are also incorporated where appropriate. This standard supersedes BS9753:1982, which is withdrawn. It is intended for use by the following originators. a) A customer wishing to procure variable r.f. type inductors that are within the sco
9、pe of the approved capability of his supplying component manufacturer, e.g.for customers detail specifications (CDSs). b) A capability approved manufacturer of variable r.f. type inductors wishing to prepare specifications for his own products which are within the scope of his capability approval. A
10、 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
11、 front cover, an inside front cover, pagesi andii, pages1 to8 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.BS9753:1986 BSI 01-2000 1 1 Scope This BritishStandard
12、 specifies inspection requirements and tests from which a selection is made when preparing a detail specification for variable r.f. type inductors to be released under the terms of BS9720 capability approval. It includes a blank detail specification (BDS), which shows the format, and indicates which
13、 tests are considered to be appropriate to this type of component; although the final selection of tests to be included in the inspection schedule is at the discretion of the specification writer. It also lists appropriate ratings and characteristics. NOTEQualification approved small fixed r.f. indu
14、ctors may also be procured in accordance with BS9751. 2 Related documents BS2011, Basic environmental testing procedures. BS6001, Sampling procedures for inspection by attributes. BS9000, General requirements for a system for electronic components of assessed quality. BS9720, Specification for custo
15、m-built transformers and inductors of assessed quality: generic data and methods of test. BS9750, Specification for fixed r.f. inductors of assessed quality: generic data and methods of test. PD9002, BS9000, BS CECC and IECQ qualified products list. NOTEBS6001, BS9720 and BS9750 should be available
16、for reference when preparing detail specifications. 3 Preparation of the detail specification 3.1 General A detail specification shall be prepared in accordance with2.6.1 of BS9720:1983. NOTE 1The detail specification should take the form of the BDS shown in clause5, particularly in respect of the f
17、ront cover format and, in principle, in respect of the presentation of the inspection requirements. NOTE 2All the tests shown in the BDS are taken either from BS9720 or from BS9750. Those shown in bold type concern operating characteristics of fundamental importance and it is strongly recommended th
18、at these are selected by the specification writer for inclusion in the detail specification. The tests shown in plain type are listed for the convenience of the specification writer, and tests should be selected from them according to the particular application of the component. NOTE 3Over-specifica
19、tion may carry an economic penalty. However, the specification writer may specify tests and sampling levels different from, less than, or additional to those given in theBDS. 3.2 Particular requirements 3.2.1 Where additional tests of a type not defined or invoked in BS9720 or BS9750 are required, t
20、hese shall be fully specified in the detail specification. 3.2.2 Any tests considered as being destructive shall be so denoted in the test schedule by the addition of the notation “(D)”. NOTEThe use of this notation is not illustrated in theBDS. 3.2.3 Tests shall be grouped in the schedule according
21、 to the level of sampling required and, where indicatedsee4.1 b), in the order of testing required. Where100% testing is not required, inspection levels and acceptable quality levels shall be selected from BS6001. 3.2.4 The completed detail specification shall be allocated a component identity numbe
22、r and issue status by the originator. NOTE 1This number is chosen by the originator (manufacturer or customer) within his own system. It is thus not subject to any external rules or codification. NOTE 2In the special case of a manufacturers detail specification for a standard catalogue item which th
23、e manufacturer wishes to be listed in PD9002, BSI will allocate an appropriate number in accordance with15.11 of BS9000-1:1981. 3.2.5 Additionally the detail specification shall include a number allocated by the component manufacturer comprising this specification number, his factory identification
24、code letters and a unique number within his registration system, e.g.BS9753/XYZ/1234. NOTEAfter a detail specification has been allocated the manufacturers reference number in accordance with3.2.5, it is to be considered a contractual part of an order. Copies of all such detail specifications are to
25、 be retained by the manufacturers chief inspector. 3.3 Ratings and characteristics 3.3.1 Ratings. In the case of customer originated detail specifications, customer and manufacturer agreement shall be obtained on the ratings to be ascribed to the component in the detail specification. These ratings
26、shall not exceed the scope of the manufacturers capability approval (seealso1.1.12 of BS9720:1983). 3.3.2 Characteristics. A customer shall prescribe in the detail specification any characteristic required for a component. 3.4 Outline drawings and winding schematic diagram 3.4.1 The detail specifica
27、tion shall incorporate a drawing of the variable r.f. type inductor showing important features, such as those dimensions affecting interchangeability, orientation of adjuster, restrictions on mounting and marking requirements. 3.4.2 The detail specification shall incorporate a schematic diagram show
28、ing all windings, taps and phasings and giving termination identification.BS9753:1986 2 BSI 01-2000 4 Inspection requirements to be listed in the detail specification 4.1 Conformance inspection The detail specification shall incorporate the following notes. a) Sampling inspection is to be carried ou
29、t in accordance with BS6001, normal inspection. b) Tests in a group may be carried out in any order except where otherwise indicated (see3.2.3). c) Components submitted to any tests marked (D) may not be released under BS9720 capability approval (D=destructive). d) The values given for measurement l
30、imits are absolute values: measurement uncertainty is to be taken into account. 4.2 Design verification The tests to be detailed under this heading are those which the specification writer considers to be inappropriate to lot-by-lot release, but appropriate to the verification of new and original de
31、signs. Accordingly, they are to be performed only when specifically so stated in the order, and the detail specification shall carry a statement to this effect. If design verification is required, the number of specimens and that there shall be no failures shall be stated in the detail specification
32、. NOTETwo specimens will normally be required. 5 Detail specification The BDS which follows, when completed in accordance with clause3, forms the relevant detail specification. NOTEThe front cover of the BDS has been based upon the need for a customers detail specification. Where a manufacturers det
33、ail specification is required, some changes will be necessary, but the basic format should be retained.BS9753:1986 BSI 01-2000 3 Blank detail specification Sheet1 (of6) Originators component identity number Specification available from: SPECIFICATION ISSUE STATUS DATE ELECTRONIC COMPONENTS OF ASSESS
34、ED QUALITY MANUFACTURERS REFERENCE NUMBERS SEE NOTES1 AND2 BELOW a DETAIL SPECIFICATION IN ACCORDANCE WITH BS9753:1986 VARIABLE R.F. TYPE INDUCTOR BRIEF TECHNICAL DESCRIPTION For detail dimensions and schematic diagram see sheet6 NOTE 1It may be possible to procure this component from any manufactur
35、er holding a current BS9720 Capability Approval Certificate (listed in PD9002) for such wound components defined herein, i.e.where this component falls within the manufacturers approved limits. NOTE 2Current Approved Manufacturers are: a Manufacturer Capability Approval No. Manufacturers Ref. No. BS
36、9753/XYZ/1234 a The listing of manufacturers in a copy of this document issued by a potential customer is at the customers discretion.BS9753:1986 4 BSI 01-2000 Blank detail specification Sheet2 (of6) Originators component identity number Variable r.f. type inductor to BS9753:1986 RATINGS AND CHARACT
37、ERISTICS (see3.3 of BS9753:1986) ISSUE STATUS DATE Climatic category Operating temperature range Storage temperature range Mass Vibration(seeBS2011-2.1Fc) Bump(seeBS2011-2.1Eb) Solderability(seeBS2011-2.1Ta) Robustness of terminations(see tests Ua, Ub, Uc or Ud of BS2011-2.1U as appropriate) Maximum
38、 specified inductance Q at max. specified inductance Minimum specified inductance Q at min. specified inductance Operating frequency Self resonant frequency (at max. specified inductance) D.C. resistance of winding(s) Peak working voltage Power ratingBS9753:1986 BSI 01-2000 5 Blank detail specificat
39、ion Sheet3 (of6) Originators component identity number Variable r.f. type inductor to BS9753:1986 Inspection requirements (see notes) ISSUE STATUS DATE TEST IL AQL BS9720:1983 Reference BS9750:1978 Reference Performance requirements and conditions of test DESIGN VERIFICATION ONLY:2 specimens, no fai
40、lures(see4.2 of BS9753:1986) Design verification inspection comprises those tests listed below plus all those selected for conformance inspection. Design verification tests shall only be performed when specifically invoked by the relevant order. As required As required As required As required As req
41、uired As requiredBS9753:1986 6 BSI 01-2000 Blank detail specification Sheet4 (of6) Originators component identity number Variable r.f. type inductor to BS9753:1986 ISSUE STATUS Inspection requirements (see notes) DATE TEST IL AQL BS9720:1983 Reference BS9750:1978 Reference Performance requirements a
42、ndconditions of test TESTS ON COMPLETED COMPONENTS Visual inspection 100% 1.2.2 Dimensions 100% 1.2.3 Inductance and Q at max. inductance 100% 1.2.5.2 and 1.2.5.3 Inductance and Q at min. inductance 100% Voltage proof 100% 1.2.4.4 D.C. winding resistance S4 1% 1.2.4.1.1 Self-resonant frequency at ma
43、x. inductance S4 1% 1.2.5.4.1 or 1.2.5.4.2 Insulation resistance (standard atmosphere) S4 1% 1.2.4.2.1 Electrostatic screens S4 1% 1.2.4.8.1 BS9753:1986 BSI 01-2000 7 Blank detail specification Sheet5 (of6) Originators component identity number Variable r.f. type inductor to BS9753:1986 ISSUE STATUS
44、 INSPECTION REQUIREMENTS (seenotes) DATE TEST IL AQL BS9720:1983 Reference BS9750:1978 Reference Performance requirements and conditions of test TESTS ON COMPLETED COMPONENTS (continued) Magnetic shielding S4 2.5% 1.2.4.6.1 Degree of coupling S4 2.5% 1.2.5.10 Insert additional tests as required: NOT
45、E 1Sampling inspection is to be carried out in accordance withBS6001, normal inspection. NOTE 2Tests in a group may be carried out in any order except where otherwise indicated(see3.2.3 of BS9753:1986). NOTE 3Components submitted to any tests marked (D) may not be released under BS9720 capability ap
46、proval. NOTE 4The values given for measurement limits are absolute values: measurement uncertainty is to be taken into account.BS9753:1986 8 BSI 01-2000 Blank detail specification Sheet6 (of6) Originators component identity number Variable r.f. type inductor to BS9753:1986 OUTLINE DRAWING SCHEMATIC
47、ISSUE STATUS DATE Drawing in accordance with BS308 Dimensions in mm Third angle projection Drawing (see3.4.1 of BS9753:1986): Marking: component identity no. including specification issue status; factory identity code as a minimum; position to be indicated (see also 1.1.6 of BS9720:1983) Schematic d
48、iagram (see 3.4.2 of BS9753:1986): blankBS9753:1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporat
49、ed by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI
