1、BRITISH STANDARD BS QC 410102:1992 IEC393-2-2: 1992 Specification for Harmonized system of quality assessment for electronic components Potentiometers for use in electronic equipment Blank detail specification Lead-screw actuated and rotary preset potentiometers Assessment level FBSQC410102:1992 BSI
2、 10-1999 ISBN 0 580 35661 2 Amendments issued since publication Amd. No. Date CommentsBSQC410102:1992 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 requirements 5 Table I 2 Table II 5BSQC410102
3、:1992 ii BSI 10-1999 National foreword The British Standard has been prepared under the direction of the Electronic Components Standards Policy Committee (ECL/-). It is identical with IEC393-2-2:1992 (QC410102) “Potentiometers for use in electronic equipment. Part2 Blank detail specification: Lead s
4、crew actuated and rotary preset potentiometers.Assessment level F”, published by the International Electrotechnical Commission and is a harmonized specification within the IECQ system of quality assessment for electronic components. IEC393-2-2 was prepared by IEC Technical Committee No.40, Capacitor
5、s and resistors for electronic equipment, and the United Kingdom participation in the drafting was provided by Technical Committee ECL/4, Capacitors and resistors for electronic equipment. Scope. This standard lists the ratings, characteristics and inspection requirements which shall be included as
6、mandatory requirements in accordance with BS QC410100 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 nat
7、ional implementation of the IECQ System”. 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
8、the requirements of this Blank Detail Specification and BS QC001002:1991 “Rules of Procedure for 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
9、for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard IEC393-1:1989 BS QC410000:1990 Harmonized system of quality assessment for electronic components: potent
10、iometers for use in electronic equipment. Generic specification (Identical) IEC393-2:1989 BS QC410100:1990 Harmonized system of quality assessment for electronic components. Potentiometersfor use in electronic equipment. Sectional specification: lead screw actuated and rotary preset potentiometers.
11、Assessment level E (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to13 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
12、 inside front cover.BSQC410102:1992 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 lay-out and minimum content of detail specifications. Detail Specifications not co
13、mplying with these 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 should be taken into account. The numbers between brackets on
14、 the first page correspond to the following information which shall be inserted in the position indicated. Identification of the detail specification (1) The “International Electrotechnical Commission” or the National Standard Organization under whose authority the detail specification is drafted. (
15、2) The IEC or National Standards 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 po
16、tentiometer (5) A short description of the type of potentiometer. (6) Information on typical construction (when applicable) for example: non-wirewound, lead-screw actuated. NOTEWhen the potentiometer is not designed for use in printed board applications this shall be clearly stated in the detail spe
17、cification in this position. (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
18、 of applications covered and/or assessment level. NOTEThe assessment level(s) to be used in a detail specification shall be selected from the sectional specification, Sub-clause 3.3.3. This implies that one blank detail specification may be used in combination with several assessment levels, provide
19、d the grouping of the tests does not change. (9) Reference data on the most important properties, to allow comparison between the various potentiometer types.BSQC410102:1992 2 BSI 10-1999 Table I (1) IEC393-2-2-XXX QC410102-XXX (2) ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: IEC393
20、-2-2 QC410102 (4) (3) LEAD SCREW ACTUATED AND ROTARY PRESETPOTENTIOMETERS Outline drawing and dimensions: (. . . angle projection) (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
21、) Information on the availability of components qualified to this detail specification is given in the Qualified Products List. (9) Style Rated dissipation at 70 C (W) Limiting element voltage (V d.c. or a.c. r.m.s.) Isolation voltage (V d.c. or a.c. peak) Normal air pressure Low air pressureBS QC41
22、0102:1992 BSI 10-1999 3 Section 1. General data 1 General data 1.1 Recommended method(s) of mounting (to be inserted) (See Sub-clause 1.4.2 of IEC Publication393-2). 1.2 Dimensions (When necessary the dimensions may be given in an Appendix to the detail specification). All dimensions are in millimet
23、res or inches and millimetres. 1.3 Ratings and characteristics 1.3.1 Derating Potentiometers covered by this specification are derated according to the following curve: (A suitable curve to be included in the detail specification) NOTESee also Sub-clause 2.2.3 of the sectional specification. 1.4 Rel
24、ated documents 1.5 Marking The marking of the component and package shall be in accordance with the requirements of IEC Publication393-2, Sub-clause1.5. NOTEThe details of the marking of the component and package shall be given in full in the detail specification. 1.6 Ordering information Orders for
25、 potentiometers covered by this 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. R
26、esistance range a The range of values in each style is given in the Qualified Products List. Tolerances on rated resistance . . .% Resistance law . . . Temperature characteristic of resistance(20Cto70 C)(%R/R) k . . .% Temperature coefficient k . . .10 6 / C Climatic category / Limits of resistance
27、change (after1000h electrical endurance test) (. . .%R+. . .7) Starting torque . . . mN.m to . . . mN.m Total mechanical travel . . . . . . turns or . . . Limiting moving contact current . . . mA Theoretical resolution (for wirewound types only) . . .% a The preferred values are those of the E-serie
28、s of IEC Publication63. Generic Specification: IEC Publication393-1(1989): Potentiometers for electronic equipment. Part1: Generic Specification. Sectional Specification: IEC Publication393-2(1989): Potentiometers for electronic equipment. Part2: Sectional Specification: Lead-screw actuated and rota
29、ry preset potentiometers.BSQC410102:1992 4 BSI 10-1999 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 clarific
30、ation of the detail 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.BS QC410102:1992 BSI 10-1999 5 Section 2. Inspection requirement
31、s 2 Inspection requirements 2.1 Procedures 2.1.1 For Qualification Approval the procedures shall be in accordance with the Sectional Specification. IEC Publication393-2, Sub-clause 3.2. 2.1.2 For Quality Conformance Inspection the test schedule (Table II) includes sampling, periodicity, severities a
32、nd requirements. The formation of inspection lots is covered by Sub-clause 3.3.1 of the SectionalSpecification. For the quality conformance inspection the values representative of the whole approved range shall be tested within one year (Groups A, B and C only). NOTEWhen drying is called for, Proced
33、ureI of the Generic Specification, IEC Publication393-1, Sub-clause 4.3 shall be used. Table II Notes4 to7 on page13 NOTE 1Sub-clause numbers of tests and performance requirements refer to the Generic Specification for potentiometers, IEC Publication393-1, except for severities for environmental tes
34、ts and limits of change in resistance or output ratio, which have to be selected from the relevant clauses of the Sectional Specification, IEC Publication393-2. NOTE 2Inspection levels and AQLs are selected from IEC Publication410: Sampling Plans and Procedures for Inspection by Attributes. NOTE 3In
35、 this table: p = periodicity (in months) n = sample size c = acceptance criterion (permitted number of defectives) D = destructive ND = non-destructive IL = inspection level IEC Publication410 AQL = acceptable quality level Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1
36、) I L A Q L Performance requirements (see Note1) (see Note2) Group A Inspection (lot-by-lot) ND S-3 4,0% As in 4.4.1 Legiblemarkingand as specified in 1.5 of this specification Sub-group A1 4.4.1 Visual examination BSQC410102:1992 6 BSI 10-1999Table II Notes4 to7 on page13 Sub-clause number and Test
37、 (see Note1) D or ND Conditions of test (see Note1) I L A Q L Performance requirements (see Note1) (see Note2) Sub-group A2 ND S-3 1,5% 4.6 Element resistance As in 4.6.3 Sub-group A3 ND S-3 2,5% 4.5 Continuity As in 4.5.1 and 4.5.2 if applicable Group B Inspection (lot-by-lot) Sub-group B1 4.12 Vol
38、tage proof 4.32Solderability 4.45 Solvent resistance of the marking (if applicable) D (Insulated potentiometers only) (For mounting method see1.1 of this specification and Note7) Normal air pressure Solder bath method Temperature:235 5 C Duration:2 0,5s Solvent: . . . Solvent temperature: . . . Meth
39、od1 Rubbing material: cotton wool Recovery: . . . S-2 1,5% As in 4.12.5 Good tinning as evidenced by free flowing of the solder with wetting of the terminations Legible markingBSQC410102:1992 BSI 10-1999 7Table II Notes4 to7 on page13 Sub-clause number and Test (see Note1) D or ND Conditions of test
40、 (see Note1) Sample size & criterion of acceptability (see Note3) Performance requirements (see Note1) p n c Group C1 Inspection (periodic) Sub-group C1 ND 3 5 1 4.4.2 4.4.4 4.4.6 Dimensions (gauging) Total mechanical travel Effective electrical travel Lead-screw styles: Effective operating turns. .
41、 . Rotary styles Lead-screw styles Rotary styles As specified in this detail specification U 70% of total mechanical travel As specified in this specification U 70% of the measure total mechanical travel As specified in this specification Sub-group C2 D 3 5 1 4.30 4.15 Robustness of terminations Rot
42、ational noise The tests appropriate to the type of termination Visual examination Element resistance Method B,%F o : . . . As in 4.30.8 %Rk (. . .%R +. . .7) k . . .%R Sub-group C3 D 6 8 1 4.43.2 Electrical endurance at70 C Duration:1000h Loaded between a and c Examination at48h,500h and1000h, Visua
43、l examination Element resistance As in 4.43.2.6 1) %Rk (. . .%R +. . .7)BSQC410102:1992 8 BSI 10-1999Table II Notes4 to7 on page13 Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1) Sample size & criterion of acceptability (see Note3) Performance requirements (see Note1) p
44、 n c Loaded between a and b Examination at48h,500h and1000h: Visual examination Resistance a to b Element resistance All specimens Examination at1000h: Insulation resistance (Insulation potentiometers only) (For mounting method see1.1 of this specification and Note7) Rotational noise, Method B,%F o
45、: . . . As in 4.43.2.6 1) %Rk (. . .%R +. . .7) %Rk (. . .%R +. . .7) U 1G7 k . . .%R Group D Inspection (periodic) Sub-group D1 D 12 5 1 4.39 Damp heat, steady state 1) Sub-cl. 4.39.2.1 1st group:1 specimen 2nd group:2 specimens 3rd group:2 specimens 2) Sub-cl. 4.39.2.2 1st group:2 specimens 2nd gr
46、oup:3 specimens D.C. load (See Note6) Isolation voltage (See Note6) (For mounting method see1.1 of this specification and Note7) As in 4.39.4BSQC410102:1992 BSI 10-1999 9Table II Notes4 to7 on page13 Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1) Sample size & criterio
47、n of acceptability (seeNote3) Performance requirements (see Note1) p n c Final measurements Visual examination Element resistance Insulation resistance (Insulated potentiometers only) (For mounting method see1.1 of this specification and Note7) Continuity Starting torque Voltage proof (Insulated pot
48、entiometers only) (For mounting method see1.1 of this specification and Note7) As in 4.39.6.1 %Rk (. . .%R +. . .7) U 100M7 As in 4.5.1 . . . mN.m to . . . mN.m As in 4.39.6.8 Sub-group D2 D Number of cycles:200 Rate: Rotary types:5 to10cycles per minute Lead-screw types: . . . Visual examination El
49、ement resistance Starting torque Rotational noise, Method B, %F o : . . . 12 8 1 As in 4.40.6 %Rk (. . .%R +. . .7) . . . mN.m to . . . mN.m k . . .%R 4.40 Mechanical endurance (potentiometers) Sub-group D3 ND For types fitted with end stops: As specified in4.20.1 Notlessthanfive times the upper limit of the starting torque 12 5 1 As specified in this specification As in 4.20.1 4.18 4.20 Starting torque End stop torqueBSQC410102:1992 10 BSI 10-1999Table II Notes4 to7 on page13 Sub-clause number and Test (
