1、BRITISH STANDARD BS QC 410101:1990 Specification for Harmonized system of quality assessment for electronic components Blankdetail specification Load screw actuated and rotary preset potentiometers Assessment level EBSQC410101:1990 BSI 12-1999 ISBN 0 580 35660 4 Amendments issued since publication A
2、md. No. Date CommentsBSQC410101:1990 BSI 12-1999 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 3 1.5 Marking 3 1.6 Ordering information 3 1.7 Certified recor
3、ds of released lots 4 1.8 Additional information (not for inspection purposes) 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 Procedures 4 Table I 2 Table II 4BSQC410101:1990 ii BSI 12
4、-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Policy Committee ECL/-. It is identical with IECPublication393-2-1 (QC410101) “Potentiometers for use in electronic equipment. Part2 Blank detail specification: Lead screw actua
5、ted and rotary preset potentiometers. Assessment level E”, published by the International Electrotechnical Commission (IEC). Cross-references. The British Standard harmonized with QC001001 and QC001002 is BS9000 “General requirements for electronic components or assessment quality”. Notes4 to8 can b
6、e found on page14. Scope. This standard lists the ratings, characteristics and inspection requirements which shall be included as mandatory requirements in accordance with BS QC410100. Detailed specification layout. In the event of conflict between the requirements of this specification and the prov
7、isions of BS9000 the latter shall take precedence except that the front page layout will be in accordance with BS9000 Circular letter No15. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applicat
8、ion. Compliance with a British Standard does not of itself confer immunity from legal obligations. International Standard Corresponding British Standard IEC393-1:1989 BS QC410000 Harmonized system of quality assessment for electronic components: Potentiometers for use in electronic equipment. Generi
9、cspecification (Identical) IEC393-2:1989 BS QC410100 Harmonized system of quality assessment for electronic components: Potentiometers for use in electronic equipment. Sectionalspecification lead screw actuated and rotary preset potentiometers. Assessment level E (Identical) IEC410:1973 BS6001 Sampl
10、ing procedures for inspection by attributes. Part1:1972: Specification for sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to14 and a back c
11、over. 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.BSQC410101:1990 BSI 12-1999 1 Introduction Blank detail specification A blank detail specification is a supplementary document t
12、o the Sectional Specification and contains requirements for style and lay-out and minimum content of detail specifications. Detail Specifications not complying with these requirements shall not be considered as being in accordance with IEC Specifications nor shall they so be described. In the prepar
13、ation of detail specifications the content of Sub-clause1.4 of the Sectional Specification should be taken into account. The numbers between brackets on the first page correspond to the following information which shall be inserted in the position indicated. Identification of the detail specificatio
14、n (1) The “International Electrotechnical Commission” or the National Standard Organization under whose authority the detail specification is drafted. (2) The IEC or National Standards number of the detail specification, date of issue and any further information required by the national system. (3)
15、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 type of potentiometer. (6) Information on typical construction (when applicable) for example: non-wirewou
16、nd, lead-screw actuated. 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 with main dimensions which are of importance for interchangeability and/or reference to the nationa
17、l 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. NOTEThe assessment level(s) to be used in a detail specification shall be selected from the sectio
18、nal specification, Sub-clause 3.3.3. 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) Reference data on the most important properties, to allow comparison between the various potentiome
19、ter types.BSQC410101:1990 2 BSI 12-1999 Table I (1) IEC393-2-1-XXX QC410101-XXX (2) ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: IEC393-2-1 QC410101 (4) (3) LEAD-SCREW ACTUATED ANDROTARYPRESET POTENTIOMETERS (5) Outline drawing and dimensions: (. . . angle projection) (7) (When nece
20、ssary 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 qualified to this detail specification is given in the Qualified Products List. (9) Style Rated dissi
21、pation at70 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 pressureBSQC410101:1990 BSI 12-1999 3 Section 1. General data 1.1 Recommended method(s) of mounting (to be inserted) (See Sub-clause 1.4.2 of IEC Publication393-2).
22、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 characteristics 1.3.1 Derating Potentiometers covered by this specification are derated according to the following curv
23、e: NOTESee also Sub-clause 2.2.3 of the sectional specification. 1.4 Related documents 1.5 Marking The marking of the component and package shall be in accordance with the requirements of IECPublication393-2, Sub-clause1.5. NOTEThe details of the marking of the component and package shall be given i
24、n full in the detail 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
25、 and issue reference of the detail specification and style reference. Resistance 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(20 C to70 C) (% R/R) u . . .% Temper
26、ature coefficient u . . .10 6 / C Climatic category -/-/- Low air pressure 8.5kPa(85mbar) Limits of resistance change (after1000h electrical endurancetest) (. . .%R+. . .7) Starting torque . . .mN.m to . . .mN.m Total mechanical travel . . . . . . turns or . . . Limiting moving contact current . . .
27、mA Theoretical resolution (for wirewound types only) . . .% a The preferred values are those of the E-series of IEC Publication63. (A suitable curve to be included in the detail specification) Generic Specification: IEC Publication393-1(1989): Potentiometers for use in electronic equipment. Part1: G
28、eneric Specification. Sectional Specification: IEC Publication393-2(1989): Potentiometers for use in electronic equipment. Part2: Sectional Specification: Lead-screw actuated and rotary preset potentiometers.BSQC410101:1990 4 BSI 12-1999 1.7 Certified records of released lots Required/not required.
29、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 specification). 1.9 Additional or increased severities or requirements to those specified in the
30、generic and/or sectional specification NOTEAdditions or increased requirements should be specified only when essential. Section 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-
31、clause 3.2. 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-clause 3.3.1 of the Sectional Specification. For the quality conformance inspection the values representat
32、ive of the whole approved range shall be tested within one year (Groups A, B and C only). NOTEWhen drying is called for, Procedure I of Sub-clause 4.3 of the Generic Specification, IEC Publication393-1 shall be used. Table II NOTE 1Sub-clause numbers of tests and performance requirements refer to th
33、e generic specification for potentiometers, IEC Publication393-1, except for some severities for environmental tests and limits of change in resistance or output ratio, which have to be taken from the relevant clauses of the sectional specification, IEC Publication393-2. NOTE 2Inspection levels and
34、AQLs are selected from IEC Publication410: 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-destructive IEC Publication410 IL = inspection le
35、vel Sub-clause number andTest (see Note1) D or ND Conditions of test (see Note1) IL AQL Performance requirements (see Note1) (see Note2) Group A Inspection (lot-by-lot) Sub-group A1 ND II 4.0% 4.4.1 Visual examination As in 4.4.1 Legible marking and as specified in1.5 of this specification Sub-group
36、 A2 ND II 1.0% 4.6 Element resistance As in 4.6.3 Sub-group A3 ND S-2 4.0% 4.4.2 Dimensions (gauging) As specified in this specification Notes4 to8 on page14 BSQC410101:1990 BSI 12-1999 5Table II Sub-clause number andTest (see Note1) D or ND Conditions of test (see Note1) IL AQL Performance requirem
37、ents (see Note1) (see Note2) Sub-group A4 ND S-3 1.0% 4.7 4.5 4.15 4.12 Terminal resistance Continuity Rotational noise Voltage proof Resistance a to b Resistance b to c Method B, % F O : . (Insulated potentiometers only) (For mounting method see1.1 of this specification and Note8) Normal air pressu
38、re u . 7 u . 7 As in 4.5.2 u . 7 As in 4.12.5 Group B Inspection (lot-by-lot) Sub-group B1 D S-2 1.5% 4.18 4.31 Starting torque Sealing (if applicable) Temperature:85 C to90 C As specified in this specification As in 4.31.3 Sub-group B2 ND S-2 1.5% 4.32 4.45 Solderability Solvent resistance of the m
39、arking (ifapplicable) Solder bath method Temperature:235 5 C Duration:2 0.5s Solvent: . Solvent temperature: . Method1 Rubbing material: cotton wool Recovery: . Good tinning as evidenced by free flowing of the solder with wetting of the terminations Legible marking Notes4 to8 on page14BSQC410101:199
40、0 6 BSI 12-1999Table II Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1) Sample size&criterion of acceptability (seeNote3) Performance requirements (see Note1) p n c Group C Inspection (periodic) Sub-group C1 ND 3 8 1 4.14 4.21 4.20 4.22 4.4.4 Temperature characteristic
41、of resistance Locking torque (if applicable) End stop torque Thrust and pull on spindle Total mechanical travel Lower category temperature/20 C 20 C/70 C 20 C/Upper category temperature Output ratio Visual examination For types fitted with end stops: As specified in 4.20.1 Not less than five times t
42、he upper limit of the starting torque (unless otherwise stated by the detail specification) For types fitted with slippingclutches: Asspecifiedin4.20.2 Only the thrust shall be applied. The pull is not applicable Half of the specimens: Asspecified in 4.22.2 Continuity Remaining specimens: Asspecifie
43、d in 4.22.3 Lead-screw styles: Effective operating turns. Rotary styles u .% u .% u .% u .% As in 4.21.3 As in 4.20.1 As in 4.20.2 As in 4.22.2 u .% W 70% of total mechanical travel As specified in this specification Notes4 to8 on page14 %R R - %R R - %R R - % U ab U ac - % U ab U ac -BSQC410101:199
44、0 BSI 12-1999 7Table II Sub-clause number and Test (see Note1) D or ND Conditions of test (see Note1) Sample size&criterion of acceptability (seeNote3) Performance requirements (see Note1) p n c 4.4.6 Effective electrical travel Lead-screw styles: Rotary styles W70% of the measured total mechanical
45、travel As specified in this specification Sub-group C2A Part of the sample of Sub-group C2 D 3 7 4.30 4.33 4.44 4.31 Robustness of terminations Resistance to soldering heat Component solvent resistance (ifapplicable) Sealing (ifapplicable) The test appropriate to the type of terminations Visual exam
46、ination Element resistance For potentiometers designed for printed board applications: Method1A For other potentiometers: Method1B Element resistance Terminal resistance: Resistance a to b Resistance b to c Solvent: . Solvent temperature: . Method2 Recovery: . Temperature:85 C to90 C As in 4.30.8 %R
47、u (.%R+.7) %Ru (.%R+.7) u.7 u.7 See detail specification As in 4.31.3 Notes4 to8 on page14BSQC410101:1990 8 BSI 12-1999Table 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
48、Sub-group C2B Other part of sample of Sub-group C2 D 3 6 4.34 4.36 4.37 4.35 Change of temperature Bump (or shock) (see Note5) Shock (or bump) (see Note5) Vibration (see Note6) See Note4 F A = Lower category temperature F B = Upper category temperature Visual examination Output ratio Element resista
49、nce For mounting method see1.1 of this specification Acceleration:390m/s 2 Number of bumps:4000 Visual examination Element resistance For mounting method see1.1 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 As in 4.34.5 u .% %Ru (.%R+.7) As in 4.36.3 %R u (.%R+.7) As in 4.37.3 %R u (.%R+.7) Notes4 to8 on page14 % U ab U ac -
