1、BRITISH STANDARD BS QC 410203: 1992 IEC393-4-1: 1992 Specification for Harmonized system of quality assessment for electronic components Potentiometers for use in electronic equipment Blank detail specification Single-turn rotary power potentiometers Assessment level EBSQC 410203:1992 BSI11-1999 ISB
2、N 0 580 35586 1 Amendments issued since publication Amd. No. Date CommentsBSQC 410203:1992 BSI 11-1999 i Contents Page National foreword ii Introduction 1 Section 1. General data 1 General data 2 Section 2. Inspection requirements 2 Inspection and requirements 4 Table I 2 Table II 4BSQC 410203:1992
3、ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Policy Committee (ECL/-). It is identical with IEC393-4-1:1992 (QC410203) “Potentiometers for use in electronic equipment. Part4 Blank detail specification: Single-turn
4、 rotary power potentiometers. Assessment level E”, published by the International Electrotechnical Commission (IEC) and is a harmonized specification within the IECQ system of quality assessment for electronic components. IEC393-4-1 was prepared by IEC Technical Committee No.40, Capacitors and resis
5、tors 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 mandatory r
6、equirements in accordance with BS QC410200 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 implem
7、entation 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 requirem
8、ents of this Blank Detail Specification and BS QC001002:1991 “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 cor
9、rect 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: potentiometers for
10、use in electronic equipment. Generic specification (Identical) IEC393-4:1992 BS QC410200:1992 Harmonized system of quality assessment for electronic components. Potentiometers for use in electronic equipment. Sectional specification for single-turn rotary power potentiometers (Identical) Summary of
11、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 inside front cover.BSQC 410203:1992 BSI 1
12、1-1999 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 not
13、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 the first page correspond to the following
14、 information which shall be inserted in the position indicated. Identification of the detail specification Identification of the potentiometer (1) The “International Electrotechnical Commission” or the National Standards Organisation under whose authority the detail specification is drafted. (2) The
15、 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. (5) A short description of the
16、 type 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
17、 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/or assessment level
18、. 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 does not change. (9)
19、Reference data on the most important properties, to allow comparison between the various potentiometer types.BSQC 410203:1992 2 BSI 11-1999 Table I Section 1. General data 1 General data 1.1 Recommended method(s) of mounting (to be inserted) (See Sub-clause1.4.2 of IEC Publication393-4). 1.2 Dimensi
20、ons (When necessary the dimensions may be given in an Appendix to the detail specification). All dimensions are in millimetres or inches and millimetres. (1) IEC393-4-1-XXX QC410203-XXX (2) ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: IEC393-4-1 QC410203 (4) (3) SINGLE-TURN ROTARY P
21、OWER POTENTIOMETERS (5) 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): E (8) Information on the availability of components qualif
22、ied to this detail specification is given in the Qualified Products List. (9) Style Rated dissipation at20 C Rated dissipation at70 C Limiting element voltage Isolation voltage (V d.c. or a.c. peak) (W) (W) (V d.c. or a.c. r.m.s.) Normal air pressure Low air pressureBSQC 410203:1992 BSI 11-1999 3 1.
23、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-clause2.2.3 of the sectional specification. 1.4 Related documents 1.5 Marking The mar
24、king of the component and package shall be in accordance with the requirements of IECPublication393-4, 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 potentiometers covered by this spe
25、cification 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, if n
26、ot 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 detail
27、 specification). Information shall be given when the mounting of the potentiometer has a critical effect on items such as bearings and seals, due to differing thermal gradients. Resistance range a The range of values in each law and in each style is given in the Qualified Products List. Tolerances o
28、n rated resistance . . .% Resistance law . . . Climatic category -/-/- Low air pressure 8,5kPa(85mbar) 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 .
29、 . . Ineffective travel (clockwise) k . . . Ineffective 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 IEC Publicati
30、on63. Generic Specification: IEC Publication393-1(1989): Potentiometers for use in electronic equipment. Part1: Generic Specification. Sectional Specification: IEC Publication393-4(1991): Potentiometers. Part4: Sectional Specification: Single-turn rotary power potentiometers.BSQC 410203:1992 4 BSI 1
31、1-1999 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. Section 2. Inspection requirements 2 Inspection and requirements 2.1 Procedures 2.1.1 For Qu
32、alification Approval the procedures shall be in accordance with the Sectional Specification, IEC Publication393-4, 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 cov
33、ered 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 (Groups A, B and C only). NOTEWhen drying is called for, ProcedureI of the Generic specification, IEC Publication393-1,
34、 Sub-clause4.3 shall be used. Table II NOTE 1Sub-clause numbers of tests and performance requirements refer to the 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 select
35、ed from the relevant clauses of the Sectional Specification, IEC Publication393-4. NOTE 2Inspection Levels and AQLs are selected from IEC Publication410Sampling Plans and Procedures for Inspection by Attributes. NOTE 3In this table: p = periodicity (in months) n = sample size c = acceptance criterio
36、n (permitted number of defectives) D = destructive ND = non-destructive IL = inspection level IEC410 AQL = acceptable quality level Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1) IL AQL Performance requirements (see Note1) (see Note2) Group A Inspection (lot-by-lot) Su
37、b-group A1 ND II 4,0% 4.4.1 Visual examination As in4.4.1 Sub-group A2 ND II 1,0% 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-2 4,0% 4.4.2 Dimensions (gauging) As specified in this specification Notes4 to9 on page 13
38、BSQC 410203:1992 BSI 11-1999 5Table II Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1) IL AQL Performance requirements (see Note1) (see Note2) Sub-group A4 ND S-2 4,0% 4.7 4.5 4.12 Terminal resistance Continuity Voltage proof Resistance a to b Resistance b to c (Insulat
39、ed potentiometers only) (For mounting method see1.1 of this specification and Note8) Normal air pressure k . . .7 k . . . 7 As in 4.5.1 and 4.5.2 if applicable As in4.12.5 Group B Inspection (lot-by-lot) Sub-group B1 D S-2 1,5% 4.18 Starting torque As specified in this specification Sub-group B2 ND
40、S-2 1,5% 4.32 Solderability (If applicable) Solder iron size: A Temperature:350 10 C Duration:2 0,5s Good tinning as evidenced by free flowing of the solder with wetting of the terminations Notes4 to9 on page 13BSQC 410203:1992 6 BSI 11-1999Table II Sub-clause number and Test (see Note1) D or ND Con
41、ditions of test (see Note1) Sample size & criterion of acceptability (see Note3) Performance requirements (see Note1) p n c 4.45 Solvent resistance of the marking (if applicable) Solvent: . . . Solvent temperature: . . . Method1 Rubbing material: cotton wool Recovery: . . . Legible marking Group C I
42、nspection (periodic) sub-group C1 ND 3 5 1 4.21 4.20 4.22 Locking torque (ifapplicable) End stop torque Thrust and pull on spindle Output ratio Visual examination Visual examination Two specimens As specified in4.22.2 Continuity Two specimens As specified in4.22.3 Output ratio One specimen As specif
43、ied in4.22.4 Visual examination As in4.21.3 As in4.20.1 As in4.22.2 As in4.22.4 Sub-group C2A D 3 3 Part of the sample of Sub-group C2 4.30 4.33 Robustness of terminations Resistance to soldering heat (ifapplicable) The tests appropriate to the type of termination Visual examination Element resistan
44、ce Test Tb, Method2 Soldering iron: Size A Temperature:350 10 C Duration:101s Element resistance As in4.30.8 %Rk (. . .%R+. . .7) %Rk (. . .%R+. . .7) Notes4 to9 on page 13 % U ab U ac - . . . % % U ab U ac - . . . %BSQC 410203:1992 BSI 11-1999 7Table II Sub-clause number and Test (see Note1) D or N
45、D Conditions of test (see Note1) Sample size & criterion of acceptability (see Note3) Performance requirements (see Note1) p n c 4.44 Component solvent resistance (ifapplicable) Solvent: . . . Solvent temperature: . . . Method2 Recovery: . . . As specified in this specification Sub-group C2B D 3 3 O
46、ther part of sample of Sub-group C2 4.34 4.36 Change of temperature Bump (or shock) (see Note5) See Note4 F A =Lower category temperature F B =Upper category temperature Duration t 1 =30min Rated dissipation k 100W: Test Na 100W: Test Nb Rate of change of temperature:5 1 C/min Visual examination Out
47、put ratio (preset potentiometers only) Element resistance For mounting method see1.1 of this specification Acceleration: . . . m/s 2 Number of bumps: . . . Visual examination Element resistance As in4.34.5 %Rk (. . .%R+. . .7) As in4.36.3 %Rk (. . . %R+. . .7) Notes4 to9 on page 13 % U ab U ac - . .
48、 . %BSQC 410203:1992 8 BSI 11-1999Table 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 4.37 4.35 Shock (or bump) (see Note5) Vibration (see Note6) For mounting method see
49、1.1 of this specification Pulse shape: half-sine Acceleration:490m/s 2 Pulse duration:11ms Visual examination Element resistance For mounting method see1.1 of this specification Procedure B4 Frequency range: . . . Hz to . . . Hz Amplitude:0,75mm or98m/s 2(whichever is the less severe) Total duration:6h See Note4 Measurements during test Electrical continuity (as specified in4.35.4) Final measurements Visual examination Output ratio (preset potentiometers only) Element resistance As in4.37.3 %
