1、BRITISH STANDARD BSQC 410302:1992 IEC393-5-2: 1992 Specification for Harmonized system of quality assessment for electronic components Potentiometers for use in electronic equipment Blankdetail specification Single-turn rotary low-power potentiometers Assessment levelFBSQC410302:1992 BSI10-1999 ISBN
2、 0 580 35589 6 Amendments issued since publication Amd. No. Date CommentsBSQC410302:1992 BSI 10-1999 i Contents Page National foreword ii Introduction 1 Section 1. General data 1 General data 3 Section 2. Inspection requirements 2 Inspection and requirements 5 Table I 2 Table II 5BSQC410302:1992 ii
3、BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Policy Committee (ECL/-). It is identical with IEC393-5-2:1992 (QC410302) “Potentiometers for use in electronic equipment. Part5Blank detail specification: Single-turn rot
4、ary low-power potentiometers. Assessment levelF”, published by the International Electrotechnical Commission (IEC) and is a harmonized specification within the IECQ system of quality assessment for electronic components. IEC393-5-2 was prepared by IEC Technical committee No.40, Capacitors and resist
5、ors for electronic equipment and the United Kingdom participation in the drafting was provided by Technical CommitteeECL/4, Capacitors and resistors for electronic equipment. Scope. This standard lists the ratings, characteristics and inspection requirements which shall be included as mandatory requ
6、irements in accordance with BSQC410300 in any detail specifications for these components. The British Standard which implements the IECQ Rules of Procedure is BS9000“General requirements for a system for electronic components of assessed quality” Part3:1991 “Specification for the national implementa
7、tion of the IECQSystem”. The Technical Committee has reviewed the provisions of IEC63 and IEC410 to which reference is made in the text and has decided that they are acceptable for use in conjunction with this standard. Detail specifications. Detail specifications shall comply with the requirements
8、of this Blank Detail Specification and BSQC001002:1991 “Rules of Procedure of the IEC Quality Assessment System for Electronic Components (IECQ)”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct a
9、pplication. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross references International Standard Corresponding British Standard IEC393-1:1989 BSQC410000:1990 Harmonized system of quality assessment for electronic components: potentiometers for use in
10、electronic equipment. Generic specification (Identical) IEC393-5:1992 BSQC410300:1992 Harmonized system of quality assessment for electronic components. Potentiometers for use in electronic equipment. Sectional specification for single-turn rotary low-power wirewound and non-wirewound potentiometers
11、 (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to14 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 cove
12、r.BSQC410302:1992 BSI 10-1999 1 Introduction Blank detail specification A blank detail specification is a supplementary document to the Sectional Specification and contains requirements for style and layout and minimum content of detail specifications. Detail Specifications not complying with these
13、requirements shall not be considered as being in accordance with IEC specifications nor shall they so be described. In the preparation of detail specifications the content of Sub-clause1.4 of the Sectional Specification shall be taken into account. The numbers between brackets on page 2 correspond t
14、o the following information which shall be inserted in the position indicated. Identification of the detail specification (1) The “International Electrotechnical Commission” or the National Standards Organisation under whose authority the detail specification is drafted. (2) The IEC or National Stan
15、dards number of the detail specification, date of issue and any further information required by the national system. (3) The number and issue number of the IEC or national Generic Specification. (4) The IEC number of the blank detail specification. Identification of the potentiometer (5) A short des
16、cription of the type of potentiometer. (6) Information on typical construction (if applicable) for example: non-wirewound, single-turn rotary. NOTEWhen the potentiometer is not designed for use in printed board applications, this shall be clearly stated in the detail specification in this position.
17、(7) Outline drawing with main dimensions which are of importance for interchangeability and/or reference to the national or international documents for outlines. Alternatively, this drawing may be given in an appendix to the detail specification. (8) Application or group of applications covered and/
18、or assessment level. NOTEThe assessment level(s) to be used in a detail specification shall be selected from the sectional specification, Sub-clause3.3.3. This implies that one blank detail specification may be used in combination with several assessment levels, provided the grouping of the tests do
19、es not change. (9) Reference data on the most important properties, to allow comparison between the various potentiometer types.BSQC410302:1992 2 BSI 10-1999 Table I (1) IEC393-5-2-XXX QC410302-XXX (2) ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: IEC393-5-2 QC410302 (4) (3) Outline
20、drawing and dimensions: (.angleprojection) SINGLE-TURN ROTARY LOW-POWER POTENTIOMETERS (5) (7) (when necessary the dimensions may be given in an Appendix to the detail specification) Typical construction: (6) Terminal connections: Assessment level(s):F (8) Information on the availability of componen
21、ts qualified to this detail specification is given in the Qualified Products List. (9) Style Rated dissipation at70 C (W) Limiting element voltage (Vd.c. or a.c. r.m.s.) Isolation voltage (Vd.c. ora.c. peak) Resistance lawA Resistance lawsB andC Normal air pressure Low air pressureBSQC410302:1992 BS
22、I 10-1999 3 Section 1. General data 1 General data 1.1 Recommended method(s) of mounting (to be inserted) (SeeSub-clause1.4.2 of IEC Publication393-5). 1.2 Dimensions (When necessary the dimensions may be given in an Appendix to the detail specification). All dimensions are in millimetres or inches
23、and millimetres. 1.3 Ratings and characteristics 1.3.1 Derating Potentiometers covered by this specification are derated according to the curve: (a suitable curve to be included in the detail specification) NOTESeealso Sub-clause2.2.3 of the sectional specification. 1.4 Related documents 1.5 Marking
24、 The marking of the component and packaging shall be in accordance with the requirements of IECPublication393-5, Sub-clause1.5. NOTEThe details of the marking of the component and packaging shall be given in full in the detail specification. Resistance range a The range of values in each law and in
25、each style is given in the Qualified Products List. Tolerances on rated resistance .% Resistance law . Temperature characteristic of resistance(20 C to70 C)(%R/R) k . % Temperature coefficient k . 10 6 / C Climatic category / Limits of resistance change (a to c) (after1000h electrical endurance test
26、) (.%R+.7) Starting torque .mN.m to.mN.m Total mechanical travel U . Effective electrical travel U . . . Ineffective travel (clockwise) k . . . Ineffective travel (anti-clockwise) k . . . Switch torque (if applicable) . . .mN.m to. . .mN.m Switch rating (if applicable) . . .A;. . .V Limiting moving
27、contact current . . .mA Terminal resistance . . .7 Residual resistance (if applicable) . . .7 Minimum effective resistance . . .7 a The preferred values are those of the E-series of IEC Publication63. Generic Specification: IEC Publication393-1(1989): Potentiometers for use in electronic equipment.
28、Part1: Generic Specification. Sectional Specification: IEC Publication393-5(1991): Potentiometers. Part5: Sectional Specification: Single-turn rotary low-power, wirewound and non-wirewound potentiometers.BSQC410302:1992 4 BSI 10-1999 1.6 Ordering information Orders for potentiometers covered by this
29、 specification shall contain, in clear or in coded form, the following minimum information: a) Rated resistance and tolerance on rated resistance. b) Resistance law (if other than linear). c) Number and issue reference of the detail specification and style reference. d) Spindle and bush dimensions,
30、if not implicit in the style reference. 1.7 Certified records of released lots Required/not required. 1.8 Additional information (Not for inspection purposes) (The detail specification may include information such as circuit diagrams, curves, drawings and notes needed for the clarification of the de
31、tail specification). 1.9 Additional or increased severities or requirements to those specified in the generic and/or Sectional Specification NOTEAdditions or increased requirements should be specified only when essential.BSQC410302:1992 BSI 10-1999 5 Section 2. Inspection requirements 2 Inspection a
32、nd requirements 2.1 Procedures 2.1.1 For Qualification Approval the procedures shall be in accordance with the Sectional Specification, IEC Publication393-5, Sub-clause3.2. 2.1.2 For Quality Conformance Inspection the test schedule (Table II) includes sampling, periodicity, severities and requiremen
33、ts. The formation of inspection lots is covered by Sub-clause3.3.1 of the Sectional Specification. For the quality conformance inspection the values representative of the whole approved range shall be tested within one year (GroupsA,B andC only). NOTEWhen drying is called for, ProcedureI of the Gene
34、ric specification, IEC Publication393-1, Sub-clause4.3 shall be used. Table II NOTE 1Sub-clause numbers of tests and performance requirements refer to the Generic Specification for potentiometers, IECpublication393-1, except for severities for environmental tests and limits of change in resistance o
35、r output ratio, which have to be selected from the relevant clauses of the Sectional Specification, IEC Publication393-5. NOTE 2Inspection Levels and AQLs are selected from IEC Publication410: Sampling Plans and Procedures for Inspection by Attributes. NOTE 3In this table: p =periodicity (in months)
36、 n =sample size c =acceptance criterion (permitted number of defectives) D =destructive ND =non-destructive IL =inspection level IEC410 AQL =acceptable quality level Sub-clause number and Test (seeNote1) D or ND Conditions of test (seeNote1) I L A Q L Performance requirements (seeNote1) (seeNote2) G
37、roup A Inspection (lot-by-lot) Sub-groupA1 ND S-3 4,0% 4.4.1 Visual examination As in4.4.1 Sub-groupA2 ND S-3 1,5% 4.4.1 Marking 4.6Element resistance Legible marking and as specified in1.5 of this specification As in4.6.3 Sub-group A3 ND S-3 2,5% 4.15 Rotational noise Method A (non-wirewound potent
38、iometers) or MethodB (wirewound potentiometers), %F o . . . k. . .mV k . . .%R Notes4 to12 on page14 BSQC410302:1992 6 BSI 10-1999Table II Sub-clause number and Test (seeNote1) D or ND Conditions of test (seeNote1) I L A Q L Performance requirements (seeNote1) (seeNote2) Group B Inspection (lot-by-l
39、ot) Sub-groupB1 ND S-2 2,5% 4.12 4.32 4.45 Voltage proof Solderability Solvent resistance of the marking (ifapplicable) (Insulated potentiometers only) (Formounting method see1.1 of this specification and Note9) Normal air pressure Solder bath method: Temperature:235 5 C Duration:2 0,5s or Method2:
40、Soldering iron Solder iron sizeB Temperature:350 10 C Duration:2 0,5s Solvent:. . . Solvent temperature:. . . Method1 Rubbing material: cotton wool Recovery:. . . As in4.12.5 Good tinning as evidenced by free flowing of the solder with wetting of the terminations Legible marking Sub-groupB2 ND S-2 2
41、,5% 4.7 4.9 Terminal resistance Resistance law Resistance a to b Resistance b to c (The detail specification shall prescribe the appropriate test conditions and performance requirements to be selected from Subclause2.1.5 of the sectional specification k. . .7 k. . . 7 Notes4 to12 on page 14BSQC41030
42、2:1992 BSI 10-1999 7Table II Sub-clause number and Test (seeNote1) D or ND Conditions of test (seeNote1) Sample size&criterion of acceptability (seeNote3) Performance requirements (seeNote1) p n c Group C Inspection periodic Sub-group C1 ND 3 5 1 4.4.2 4.4.4 4.30 Dimensions (gauging) Total mechanica
43、l travel Robustness of terminations The tests appropriate to the type of termination Visual examination Element resistance As specified in this specification As specified in this specification As in4.30.8 %Rk (. . .%R+. . .7) Sub-group C2 ND 3 5 1 4.18 4.19 Starting torque Switch torque . . .mN.m to
44、. . .mN.m As specified in this specification Sub-group C3 D 6 8 1 4.40 Mechanical endurance (potentiometers) (seeNote4) Number of cycles:. . . Rate:. . . cycles per minute Visual examination Element resistance Starting torque Rotational noise: MethodA (non-wirewound potentiometers) or MethodB (wirew
45、ound potentiometers), %F o :. . . Sealing (if applicable) As specified in4.31.3 (container sealed potentiometers only) As specified in4.31.2.1 NOTEIt is permitted to drill the case to enable a pressure to be applied in each direction As in4.40.6 %Rk (. . .%R +. . .7) . . .mN.m to . . .mN.m k . . .mV
46、 k . . .%R As in4.31.3 As in4.31.2.1 Notes4 to12 on page 14BSQC410302:1992 8 BSI 10-1999Table II Sub-clause number and Test (seeNote1) D or ND Conditions of test (seeNote1) Sample size&criterion of acceptability (seeNote3) Performance requirements (seeNote1) p n c 4.41 4.42 A.C. endurance testing of
47、 mains switches on capacitive load (seeNotes4 and10) or Mechanical endurance (Switch if fitted) (seeNotes4 and10) Visual examination Contact resistance Temperature rise Insulation resistance Voltage proof, proof voltage:. . .Vr.m.s. Visual examination Switch contact resistance Switch torque Insulati
48、on resistance (Insulated potentiometers only) (For mounting method seeNote9) As in4.41.5 k . . .m7 k . . . C U . . .M7 No breakdown or flashover As in4.42.2.1 k . . .m7 Greater than twice the value of starting torque measured at the beginning of this group and less than200mN.m U 1G7 Sub-groupC4 D 6
49、8 1 4.43.2 Electrical endurance at70 C Duration:1000h Examination at48h,500h and1000h: Visual examination Element resistance Examination at1000h: Insulation resistance (Insulated potentiometers only) (For mounting method see1.1 of this specification and Note9) Rotational noise Method A (non-wirewound potentiometers) or MethodB (wirewound potentiometers), %F o :. . . As in4.43.2.6 1) %Rk (. . .%R+. . .7) U 1G7 k . . .mV k . . .%R Notes4 to12 on page 14BSQC410302:1992 BSI 10-1999 9Table II Sub-clause number and Test (seeNote
