1、BRITISH STANDARD BS QC 410204: 1992 IEC 393-4-2: 1992 Specification for Harmonized system of quality assessment for electronic components Potentiometers for use in electronic equipment Blankdetail specification Single-turn rotary power potentiometers Assessment levelFBSQC410204:1992 BSI10-1999 ISBN
2、0 580 35587 X Amendments issued since publication Amd. No. Date CommentsBSQC410204:1992 BSI 10-1999 i Contents Page National foreword ii Introduction 1 Section 1. General data 1.1 Recommended method(s) of mounting 3 1.2 Dimensions 3 1.3 Ratings and characteristics 3 1.4 Related documents 4 1.5 Marki
3、ng 4 1.6 Ordering information 4 1.7 Certified records of released lots 4 1.8 Additional information 4 1.9 Additional or increased severities or requirements to those specified in the generic and/or sectional specification 4 Section 2. Inspection requirements 2.1 Procedure 5 Table I 2 Table II 5BSQC4
4、10204:1992 ii 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 IEC393-4-2:1992 (QC410204) “Potentiometers for use in electronic equipment. Part4 Blank detail specification:
5、Single-turn rotary power potentiometers. Assessment level F”, published by the International Electrotechnical Commission (IEC) and is a harmonized specification within the IECQ system of quality assessment for electronic components. IEC393-4-2 was prepared by IEC Technical Committee No.40, Capacitor
6、s and resistors for electronic equipment and the UnitedKingdom 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 ma
7、ndatory requirements in accordance with BSQC410200 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 nation
8、al 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 the
9、 requirements 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 t
10、heir 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 BSQC410000:1990 Harmonized system of quality assessment for electronic components: Potentiomete
11、rs for use in electronic equipment. Generic specification (Identical) IEC393-4:1992 BSQC410200:1992 Harmonized system of quality assessment for electronic components.Potentiometers for use in electronic equipment. Sectional specification for single-turn rotary power potentiometers (Identical) Summar
12、y of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to12 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.BSQC410204:1992 B
13、SI 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 requirements shall
14、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 to the following inf
15、ormation 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 Standards number of the
16、 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 description of the typ
17、e of potentiometer. (6) Information on typical construction (if applicable) for example: 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. (7) Outline drawing wit
18、h 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/or assessment, level. N
19、OTEThe 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 does not change. (9) Ref
20、erence data on the most important properties, to allow comparison between the various potentiometer types.BSQC410204:1992 2 BSI 10-1999 (1) IEC393-4-2-XXX QC410204-XXX (2) ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: IEC393-4-2 QC410204 (4) SINGLE-TURN ROTARY POWER POTENTIOMETERS (5
21、) (3) Outline drawing and dimensions: (. . .angle projection) (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 components qualified to this detail
22、 specification is given in the Qualified Products List. (9) Table I Style Rated dissipation at20 C (W) Rated dissipation at 70 C (W) Limiting element voltage (Vd.c.or a.c.r.m.s.) Isolation voltage (Vd.c.or a.c.peak) Normal air pressure Low air pressureBSQC410204:1992 BSI 10-1999 3 Section 1. General
23、 data 1.1 Recommended method(s) of mounting (to be inserted) (SeeSub-clause1.4.2 of IECPublication393-4). 1.2 Dimensions (When necessary the dimensions may be given in an Appendix to the detail specification). All dimensions are in millimetres or inches and millimetres. 1.3 Ratings and characteristi
24、cs 1.3.1 Derating Potentiometers covered by this specification are derated according to the curve: NOTESee also Sub-clause2.2.3 of the sectional specification. Resistance range a The range of values in each law and in each style is given in the Qualified Products List. Tolerances on rated resistance
25、 . . .% Resistance law . . . Climatic category -/-/- Limits of resistance change (a to c) (after1000h electrical endurance test) (. . .%R+. . .7) Starting torque . . .mN.m to. . .mN.m Total mechanical travel U . . . Effective electrical travel U . . . Ineffective travel (clockwise) k . . . Ineffecti
26、ve travel (anti-clockwise) k . . . Limiting moving 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 IECPublication63. (a suitable curve to be included in the detail sp
27、ecification)BSQC410204:1992 4 BSI 10-1999 1.4 Related documents 1.5 Marking The marking of the component and packaging shall be in accordance with the requirements of IEC Publication393-4, Sub-clause1.5. NOTEThe details of the marking of the component and packaging shall be given in full in the deta
28、il specification. 1.6 Ordering information Orders for 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 referen
29、ce of the detail specification and style reference. d) Spindle and bush dimensions, 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
30、 circuit diagrams, curves, drawings and notes needed for the clarification of the detail specification). Information shall be given when the mounting of the potentiometer has a critical effect on items such as bearings and seals, due to different thermal gradients. 1.9 Additional or increased severi
31、ties or requirements to those specified in the generic and/or sectional specification NOTEAdditions or increased requirements should be specified only when essential. Generic Specification: IEC Publication393-1(1989): Potentiometers for use in electronic equipment. Part1: Generic Specification. Sect
32、ional Specification: IEC Publication393-4(1991): Potentiometers. Part4: Sectional Specification: Single-turn rotary power potentiometers.BSQC410204:1992 BSI 10-1999 5 Section 2. Inspection requirements 2.1 Procedures 2.1.1 For Qualification Approval the procedures shall be in accordance with the Sec
33、tional Specification, IECPublication393-4, Sub-clause3.2. 2.1.2 For Quality Conformance Inspection the test schedule (Table II) includes sampling, periodicity, severities and requirements. The formation of inspection lots is covered by Sub-clause3.3.1 of the Sectional Specification. For the quality
34、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 Generic specification IEC Publication393-1, Sub-clause4.3 shall be used. Table II NOTE 1Sub-clause numbers of tests and
35、 performance requirements refer to the revised Generic Specification for potentiometers, IEC Publication393-1, except for severities for environmental tests and limits of change in resistance or output ratio, which have to be selected from the relevant clauses of the Sectional Specification, IECPubl
36、ication393-4. NOTE 2Inspection Levels and AQLs are selected from IECPublication410: Sampling Plans and Procedures for Inspection by Attributes. NOTE 3In this table: p = periodicity (in months) n = sample size c = acceptance criterion (permitted number of defectives) D = destructive ND = non-destruct
37、ive IL = inspection level IEC410 AQL = acceptable quality level Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1) I L A Q L Performance requirements (see Note1) (seeNote2) Group A Inspection (lot-by-lot) Sub-group A1 ND S-3 4,0% 4.4.1 Visual examination As in4.4.1 Sub-gro
38、up A2 ND S-3 1,5% 4.4.1 4.6 Marking Element resistance Legible marking and as specified in1.5 of this specification As in4.6.3 Sub-group A3 ND S-3 2,5% 4.5 Continuity As in4.5.1 and4.5.2 if applicable Notes4 to9 on page12 BSQC410204:1992 6 BSI 10-1999 Table II Sub-clause number and Test (see Note1)
39、D or ND Conditions of test (see Note1) I L A Q L Performance requirements (see Note1) (seeNote2) Group B Inspection (lot-by-lot) Sub-group B1 ND S-2 1,5% 4.12 4.32 4.45 Voltage proof Solderability (ifapplicable) Solvent resistance of themarking (ifapplicable) (Insulated potentiometers only) (For mou
40、nting method see1.1 of this specification and Note8) Normal air pressure Solder iron size: A 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 wett
41、ing of the termination Legible marking Sub-group B2 ND S-2 2,5% 4.9 Resistance law (The detail specification shall prescribe the appropriate test conditions and performance requirements if the resistance law is other than linear) Linear law %of effective electrical travel:50 1 Output ratio R227 4060
42、 Rk 227 3565 Notes4 to9 on page12 % U ab U ac -BSQC410204:1992 BSI 10-1999 7 Table II 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 n c Group C Inspection (periodic) Sub-group
43、C1 D 3 5 1 4.4.2 4.18 4.30 Dimensions (gauging) Starting torque 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 D 6 8
44、1 4.43.1 4.18 Electrical endurance atroom temperature Starting torque (For mounting method seeNote9) Duration:1000h Examination at48h, 500h and1000h: Visual examination Element resistance Examination at1000h: Insulation resistance (Insulated potentiometers only) (For mounting method see1.1 of this s
45、pecification and Note8) Within4h of the completion of the measurements of the Electrical endurance at room temperature Room temperature As in4.43.1.6 1) %Rk (. . .%R+. . .7) U1G7 . . . mN.m to . . .mN.m Sub-group C3 D 12 5 1 4.40 Mechanical endurance (potentiometers) Number of cycles:5000 Rate:5 to1
46、0 cycles per minute or a maximum of80mm/s travel of the moving contact Visual examination Element resistance Starting torque Continuity As in4.40.6 %Rk (. . .%R+. . . 7) . . .mN.m to . . .mN.m As in4.5.1 and4.5.2 if applicable Notes4 to9 on page12BSQC410204:1992 8 BSI 10-1999 Table II Sub-clause num
47、ber and Test (see Note1) D or ND Conditions of test (see Note1) Sample size & criterion of acceptability (see Note3) Performance requirements (see Note1) p n c Sub-group C4 D 12 5 1 4.21 4.20 4.22 Locking torque (ifapplicable) End stop torque Thrust and pull on spindle Output ratio Visual examinatio
48、n Visual examination Two specimens As specified in4.22.2 Continuity Two specimens As specified in4.22.3 Output ratio One specimen As specified in4.22.4 Visual examination As in4.21.3 As in4.20.1 As in4.22.2 As in4.22.4 Group D Inspection (periodic) Sub-group D1 D 12 5 1 4.39 Damp heat, steady state
49、1)Sub-clause4.39.2.1 1st group:1 specimen 2nd group:2 specimens 3rd group:2 specimens 2)Sub-clause4.39.2.2 1stgroup: 2specimens 2ndgroup: 3specimens D.C. load (see Note7) Isolation voltage (seeNote7) (For mounting method see1.1 of this specification and Note8) Final measurements Visual examination Element resistance Insulation resistance (Insulated potentiometers only) (For mounting method see 1.1 of this specification and Note8) As in4.39.4 As in4.39.6.1 %Rk (. . .%R+. . .7) U 100M7 Notes4 to9 on page12 % U ab U ac -
