1、BRITISH STANDARD BSQC 410301:1992 IEC393-5-1: 1992 Specification for Harmonized system of quality assessment for electronic components Potentiometers for use in electronic equipment Blank detail specification Single-turn rotary low-power potentiometers Assessment level EBSQC410301:1992 BSI 12-1999 I
2、SBN 0 580 35588 8 Amendments issued since publication Amd. No. Date CommentsBSQC410301:1992 BSI 12-1999 i Contents Page National foreword ii Introduction 1 Section 1. General data 1.1 Recommended method(s) of mounting (to be inserted) 3 1.2 Dimensions 3 1.3 Ratings and characteristics 3 1.4 Related
3、documents 3 1.5 Marking 3 1.6 Ordering information 4 1.7 Certified records of released lots 4 1.8 Additional information (not for inspection purposes) 4 1.9 Additional or increased severities or requirements to those specifiedinthegeneric and/or sectional specification 4 Section 2. Inspection requir
4、ement 2.1 Procedure 5 Appendix A 16 Figure 1 Component under test 16 Table I 2 Table II 5BSQC410301:1992 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Policy Committee (ECL/-). It is identical with IEC393-5-1:1992
5、(QC410301) “Potentiometers for use in electronic equipment. Part5 Blank detail specification: Single-turn rotary low-power potentiometers. Assessment level E”, published by the International Electrotechnical Commission (IEC) and is a harmonized specification within the IECQ system of quality assessm
6、ent for electronic components. IEC393-5-1 was prepared by IEC Technical Committee No.40, Capacitors 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 s
7、tandard lists the ratings, characteristics and inspection requirements which shall be included as mandatory requirements in accordance with BS QC410300 in any detail specifications for these components. The British Standard which implements the IECQ Rules of Procedure is BS9000 “General requirements
8、 for a system for electronic components of assessed quality” Part3:1991 “Specification for the national 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
9、in conjunction with this standard. Detail specifications. Detail specifications shall comply with the requirements of this Blank Detail Specification and BSQC001002:1991 “Rules of Procedure for the IEC Quality Assessment System for Electronic Components (IECQ)”. A British Standard does not purport t
10、o include all the necessary provisions of a contract. Users of British Standards are responsible 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-
11、1:1989 BS QC410000:1992 Harmonized system of quality assessment for electronic components: potentiometers for use in electronic equipment. Generic specification (Identical) IEC393-5:1992 BS QC410300:1992 Harmonized system of quality assessment for electronic components. Potentiometers for use in ele
12、ctronic equipment. Sectional specification for single-turn rotary low-power wirewound and non-wirewound potentiometers (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to16 and a back cover. This standard has been updated (see copyright
13、date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BSQC410301:1992 BSI 12-1999 1 Introduction Blank detail specification A blank detail specification is a supplementary document to the Sectional Specification and contains requireme
14、nts for style and layout 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 preparation of detail specifications the content of Sub-cla
15、use1.4 of the Sectional Specification shall 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 specification (1) The “International Electrotechnical Commission”
16、or the National Standards Organisation 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) The number and issue number of the IEC or national Ge
17、neric 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 (if applicable) for example: non-wirewound, single-turn rotary. NOTEWhen the potentiometer is n
18、ot 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 national or international documents for outlines. Alternativel
19、y, 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 sectional specification, Sub-clause 3.3.3. This implies that
20、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 potentiometer types.BSQC410301:1992 2 BSI 12-1999 (1) IEC393-5-1-
21、XXX QC410301-XXX (2) ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: IEC393-5-1 QC410301 (4) (3) SINGLE-TURN ROTARY LOW-POWER POTENTIOMETERS (5) Outline drawing and dimensions: (. . .angle projection) (7) (When necessary the dimensions may be given in an Appendix to the detail specific
22、ation) 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) Table I Style Rated dissipation at70 C (W) Limiting element voltage (Vd.c. or a.c. r.m.s
23、.) Isolation voltage (Vd.c. or a.c. peak) Resistance law A Resistance laws B and C Normal air pressure Low air pressureBSQC410301:1992 BSI 12-1999 3 Section 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 neces
24、sary 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 curve: (a suitable curve to be included
25、in the detail specification) NOTESeealso Sub-clause2.2.3 of the sectional specification. 1.4 Related documents 1.5 Marking 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 an
26、d packaging shall be given in full in the detail 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 . . .% Resistance law . . . Temperature characteristic of resistance (20 C to70 C) (%R/R) k . .
27、 .% Temperature coefficient k . . . 10 6 / C 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 . .
28、 . Ineffective travel (clockwise) k . . . Ineffective travel (anticlockwise) k . . . Switch torque (if applicable) . . .mN.m to . . . mN.m Switch rating (if applicable) . . . A; . . . V Limiting moving contact current . . . mA Terminal resistance . . .7 Residual resistance (if applicable) . . .7 Min
29、imum 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. Part1: Generic Specification. Sectional Specification:IEC Publication393-5(1991): Potentiometers.
30、 Sectional Specification: Single-turn rotary low-power potentiometers.BSQC410301:1992 4 BSI 12-1999 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
31、 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 not implicit in the style reference. 1.7 Certified records of released lots Required/not required. 1.8 Additional information (Not
32、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 generic and/or sectional specifi
33、cation NOTEAdditions or increased requirements should be specified only when essential.BSQC410301:1992 BSI 12-1999 5 Section 2. Inspection requirements 2.1 Procedures 2.1.1 For Qualification Approval the procedures shall be in accordance with the Sectional Specification, IEC Publication393-5, Sub-cl
34、ause3.2. 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 conformance inspection the values representative
35、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 the Generic specification, IEC Publication393-1, Sub-clause4.3 shall be used. Table II NOTE 1Sub-clause numbers of tests and performance requirements refer to the Gener
36、ic Specification for potentiometers, IECPublication393-1, 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, IEC Publication393-5. NOTE 2Inspection Levels and AQLs are s
37、elected 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 IL = inspection level IEC Publication410 AQL =
38、acceptable quality level Sub-clause number and Test (seeNote1) D or ND Conditions of test (seeNote1) IL AQL Performance requirements (seeNote1) (seeNote2) GROUP A INSPECTION (lot-by-lot) Sub-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 Marking Legible marking
39、 and as specified in1.5 of this specification 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 4.4.4 Total mechanical travel As specified in this specification Notes4 to13 on pages 14 and 15 BSQC410301:1992 6 BSI 12-1999Table I
40、I Sub-clause number and Test (seeNote1) D or ND Conditions of test (seeNote1) IL AQL Performance requirements (seeNote1) (seeNote2) Sub-group A4 ND S-2 4,0% 4.7 Terminal resistance Resistance a to b Resistance b to c k . . .7 k . . . 7 4.5 Continuity (Wirewound potentiometers only) As in 4.5.1 and 4
41、.5.2 ifapplicable 4.15 Rotational noise Method A (non-wirewound potentiometers) k . . . mV or Method B (wirewound potentiometers), %F o : . . . k . . . %R 4.12 Voltage proof (Insulated potentiometers only) (For mounting method see1.1 of this specification and Note11) As in 4.12.5 Normal air pressure
42、 4.11 Switch contact resistance (ifapplicable) After measurement of the switch contact resistance, the switch shall be operated with a load for between5 and10 operations k . . . m7 There shall be a visual indication of the proper functioning of the switch GROUP B INSPECTION (lot-by-lot) Sub-group B1
43、 D S-2 1,5% 4.18 Starting torque As specified in this specification 4.31 Sealing (if applicable) Appendix A to this document shall be used As given in Appendix A Sub-group B2 ND S-2 1,5% 4.32 Solderability (ifapplicable) Solder bath method Temperature:235 5 C Duration:2 0,5s Good tinning as evidence
44、d by free flowing of the solder with wetting of the terminations or Method2: Soldering iron Solder iron size B Temperature:350 10 C Duration:2 0,5s 4.45 Solvent resistance of the marking (if applicable) Solvent: . . . Solvent temperature: . . . Method1 Rubbing material: cotton wool Legible marking R
45、ecovery: . . . Notes4 to13 on pages 14 and 15BSQC410301:1992 BSI 12-1999 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
46、 8 1 4.21 Locking torque (if applicable) Output ratio k . . .% Visual examination As in 4.21.3 4.20 End stop torque Visual examination As in4.20.1 4.22 Thrust and pull on spindle Three specimens As specified in4.22.2 Continuity As in4.22.2 Three specimens As specified in4.22.3 Output ratio k . . .%
47、Two specimens As specified in4.22.4 Visual examination As in4.22.4 4.40 Mechanical endurance (potentiometers) (seeNote4) Number of cycles: . . . Rate: . . . cycles per minute Visual examination As in4.40.6 Element resistance %Rk (. . .%R+. . .7) Starting torque . . . mN.m to . . . mN.m Rotational no
48、ise: Method A (non-wirewound potentiometers) k . . . mV or Method B (wirewound potentiometers), %F o : . . . k . . .%R Sealing (if applicable) As specified in4.31.3 (container sealed potentiometers only) As in4.31.3 As specified in4.31.2.1 As in4.31.2.1 NOTEIt is permitted to drill the case to enabl
49、e a pressure to be applied in each direction Notes4 to13 on pages 14 and 15 % U ab U ac - % U ab U ac -BSQC410301:1992 8 BSI 12-1999Table 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 A.C. endurance testing of mains switches on capacitive load (seeNotes4 and12) Visual examination Contact resistance Temperature rise As in4.41.5 k . . . m7 k . . . C Insulation resistance U . . .
