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1、BRITISH STANDARD BS CECC 41102:1978 Specification for Harmonized system of quality assessment for electronic components Blank detail specification Preset potentiometers (Assessment level M) Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006,
2、 Uncontrolled Copy, (c) BSI BS CECC 41102:1978 BSI 10-1999 ISBN 0 580 35556 X Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 41102:1978 BSI 10-1
3、999i Contents Page National forewordii Forewordii 1Ratings and characteristics1 2Marking1 3Related documents2 4Ordering information2 5Certified test records2 6Delayed delivery2 7Additional information (Not for inspection purposes)2 8Inspection requirements 2 Table 11 Table 23 Licensed Copy: London S
4、outh Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 41102:1978 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Committee. It is identical with CE
5、NELEC Electronic Components Committee (CECC) 41102 “Blank detail specification: Preset potentiometers (assessment level M)”. This standard is a harmonized specification within the CECC system. Terminology and conventions The text of the CECC specification has been approved as suitable for publicatio
6、n, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards. Attention is especially drawn to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a f
7、ull point on the baseline as the decimal marker. Cross references The British Standard harmonized with CECC 00100 is BS E9000 “General requirements for electronic components of assessed quality harmonized with the CENELEC Electronic Component Committee System” Part 1 “Basic rules”. The following Int
8、ernational Standards are referred to in the text and for each there is a corresponding British Standard; these are as listed below: Scope This standard lists the ratings, characteristics and inspection requirements which shall be included as mandatory requirements in accordance with BS CECC 41100. D
9、etail specification layout In the event of conflict between the requirements of this specification and the provisions of BS E9000 the latter shall take precedence except the front page layout will be in accordance with BS 9000 Circular Letter No. 15 dated August 1977. A British Standard does not pur
10、port to 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. International StandardCorresponding British Standard CECC 41000:1976BS C
11、ECC 41000:1977 Harmonized system of quality assessment for electronic components: Generic specification for potentiometers (Identical) CECC 41100:1976BS CECC 41100:1978 Harmonized system of quality assessment for electronic components: Lead screw actuated and rotary preset potentiometers (Identical)
12、 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the CECC title page, page ii, pages 1 to 10 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
13、 the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
14、 BS CECC 41102:1978 ii BSI 10-1999 Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the European Committee for Electrotechnical Standardization (CENELEC) who wish to take part in a harmonized System for electronic components of assessed quality. Th
15、e object of the System is to facilitate international trade by the harmonization of the specifications and quality assessment procedures for electronic components, and by the grant of an internationally recognized Mark, or Certificate, of Conformity. The components produced under the System are ther
16、eby accepted by all member countries without further testing. This document has been formally approved by the CECC, and has been prepared for those member countries taking part in the System who wish to issue national harmonized specifications for PRESET POTENTIOMETERS (Assessment level M). It shoul
17、d be read in conjunction with document CECC 00100: Basic Rules (1974). At the date of printing of this document the member countries of the CECC are Belgium, Denmark, Germany, France, Ireland, Italy, the Netherlands, Norway, Sweden, Switzerland, the United Kingdom, and copies of it can be obtained f
18、rom the National Committees of the CENELEC in these countries. Preface This blank detail specification was prepared by CECC Working Group 4: “Resistors”. In accordance with the requirements of document CECC 00100 it is based, wherever possible, on the Recommendations of the International Electrotech
19、nical Commission and in particular on IEC Publication 393-1: Potentiometers. Part 1: Terms and methods of test. The text of this blank detail specification was circulated to the CECC for voting in the documents listed below and was ratified by the CECC for printing as a CECC Specification. Key for p
20、age 1 The numbers between square brackets on page 3 correspond to the following indications which should be given: DocumentVoting Date CECC (Secretariat) 43327 December 1975 CECC (Secretariat) 43627 February 1976 CECC (Secretariat) 56110 January1977 Identification of the harmonized detail specificat
21、ion 1The name of National Standards Organization under whose authority the detail specification is drafted 2The CECC Symbol and the number allotted to the national detail specification by the CECC General Secretariat 3The number and issue number of the national generic and sectional specifications 4
22、The national number of the detail specification, date of issue and further information required by the national system, together with any amendment numbers, if issued. Identification of the potentiometer 5A short description of the type of potentiometer 6Information on typical construction (where ap
23、plicable) for example: non-wirewound, leadscrew actuated. 7Outline 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
24、. 8Application or group of applications covered, or, preferably, the level of quality assessment covered by the blank detail specification. 9Reference data on the most important properties, to allow comparison between the various resistor types. Licensed Copy: London South Bank University, London So
25、uth Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 41102:1978 BSI 10-19991 1.1 Derating Potentiometers covered by this specification are derated according to - - - - - - 2 Marking 2.1 The following marking information, in the order of importance given below,
26、is required: 1) Rated resistance 2) Tolerance on rated resistance 1page of2 ELECTRONIC COMPONENT OF ASSESSED QUALITY IN ACCORDANCE WITH 34 DETAIL SPECIFICATION for Typical Construction: 5 6 73 All dimensions in millimetres. Table 1 Rated dissipation at 70 C (W) Limiting element voltage V d.c. or a.c
27、. Isolation voltage V d.c. or a.c. peak 9 Normal air pressureLow air pressure 1 Ratings and characteristics aResistance range Standard selection Standard selection tolerances Temperature characteristic of resistance (20 to 70 C) Climatic category The range of values in each style is given in the Qua
28、lified Products List - - - - - - - % % R: k (- - %R) (% R/R %T: k- - - ppm/C) -/-/- a The preferred values are those of the E - - - series of IEC 63. Where the use of intermediate values is essential, they should, wherever possible, be chosen from a series in that document. See the relevant Qualifie
29、d Products List for availability of components made to this specification Vibration severity Limits of resistance change (a to c) (after 1 000 h electrical endurance test) Starting torque Total mechanical travel Limiting slider current - - - Hz to - - - Hz: 0,75 mm or 98 m/s2 (whichever is the less
30、severe) (- - - % R + - - - 7) - - - mNm to - - - mNm - - - - - - turns or - - - . - - - mA Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 41102:1978 2 BSI 10-1999 3) Resistance law (if other than linea
31、r) 4) Detail specification and style 5) Date of acceptance. A nationally approved code may be used. 6) Manufacturers name and trade mark 2.2 The potentiometers itself shall be clearly marked with 1) and 2) above using, where practicable, one of the coding methods specified in IEC 62, and with as man
32、y of the remaining items as is practicable. 2.3 The package containing the potentiometer shall be clearly marked with 1) to 6). 2.4 Any additional marking shall be so applied that no confusion can arise. 3 Related documents (National Authorized Institutions will complete this section, making referen
33、ce to any documents recommendations or specifications directly referred to in their national equivalent of this document). 4 Ordering information Orders for potentiometers covered by this specification shall contain the following information: Resistance value and tolerance Resistance law (if other t
34、han linear) Number of the detail specification and style reference 5 Certified test records National Authorized Institutions shall indicate whether certified test records shall be prepared in accordance with 3.5 of CECC 41000. 6 Delayed delivery The provisions of 3.6 of CECC 41000 shall apply except
35、 that the Inspection Level shall be reduced to S-2 and (except for carbon composition types the period shall be extended to two years. The period for carbon composition types shall remain at one year. 7 Additional information (Not for inspection purposes) The detail specification may include informa
36、tion (which is not required to be verified by the inspection procedure) such as circuit diagrams, curves, drawings, notes needed for the clarification of the detail specification. The resolution shall also be given for wirewound types only. 8 Inspection requirements 8.1 When drying is called for, pr
37、ocedure I of 4.2 of CECC 41000 shall be used. 8.2 When it is desired to obtain qualification approval by adopting the fixed sample size procedure, use shall be made of the test schedule given for that purpose in CECC 41100. The conditions of test and the performance requirements shall be identical t
38、o those prescribed for quality conformance inspection in the detail specification. 8.3 In the quality conformance inspection the values representative of the whole approved range shall be tested within one year (Groups A, B and C only). Licensed Copy: London South Bank University, London South Bank
39、University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 41102:1978 BSI 10-19993 Table 2 Test (See Note 1) D or ND Conditions of Test ILAQLPerformance Requirements (See Note 1) (See Note 2) Group A Inspection To be conducted on a sampling basis, lot-by-lot Sub-Group A1NDS-3
40、4,0 % 4.3.1Visual inspection As in 4.3.1 Sub-Group A2NDS-31,5 % 4.3.2 4.5 Marking Element resistance As in 4.3.2 As in 4.5.1 Sub-Group A3NDS-32,5 % 4.4ContinuityAs in 4.4 Group B Inspection To be conducted on a sampling basis, lot-by-lot Sub-Group B1DS-21,5 % 4.12Voltage proofInsulated styles only N
41、ormal air pressure See D1.1 As in 4.12.5 4.23.1Soldering Solderability Solder bath method:The terminations shall be examined for good tinning as evidence by free flowing of the solder with wetting of the terminations Temperature: Duration: 230 10 C 2 0,5 s Notes on page 10 Licensed Copy: London Sout
42、h Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 41102:1978 4 BSI 10-1999 Table 2 Test (See Note 1) D or ND Conditions of Test Sample size & criterion of acceptability (See Note 3) Performance Requirements (See Note 1) Pnc Group
43、C Inspection To be conducted on a sampling basis, at the periodicity given in column “P”. Sub-Group C1ND351 4.3.3Dimensions (gauging) As specified in the detail specification 4.8Mechanical and electrical travel See C1.1 and C1.2 Lead screw styles. Effective operating turns Rotary styles 70 % of tota
44、l mechanical travel As specified in the detail specification Sub-Group C2D351 4.21Robustness of terminations The tests appropriate to the type of termination Visual examination Element resistance As in 4.21.8 (1) %R: k (- - %R+ - - 7) 4.15Rotational noise Method Bk - - - 7 Sub-Group C3D681 4.32.2 El
45、ectrical endurance at 70 C See D1.2 Duration: 1 000 h Loaded between a and c. Examination at 168, 500 and 1 000 h. Visual examination Element resistance a to c Loaded between a and b Examination at 168, 500 and 1 000 h. Visual examination Resistance a to b As in 4.32.2.6 (1) %R: k (- - %R+ - - 7) As
46、 in 4.32.2.6 (1) %R: k (- - %R+ - - 7) Notes on page 10 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:01:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 41102:1978 BSI 10-19995 Table 2 Test (See Note 1) D or ND Conditions of Test Sample size & criteri
47、on of acceptability (See Note 3) Performance Requirements (See Note 1) Pnc All specimens Examination at 1 000 h Insulation resistance See D1.1 Rotational noise Method B U 1 C7 k - - - 7 Group D Inspection To be conducted on a sampling basis, at the periodicity given in column “P” Sub-Group D1D1251 4
48、.29Damp heat, steady state Where potentiometers are designed to be mounted directly on to a metal chassis 4.29.2.1 shall apply. The first group shall contain one specimen and the second and third groups two specimens in each. For all other potentiometers 4.29.2.2 shall apply. The first group shall c
49、ontain two specimens and the second group three specimens. DC load (See Note 4) Isolation voltage (See Note 4 and D1.1) As in 4.29.4 Final measurements Visual examination Element resistance Insulation resistance (insulated styles only) See D1.1. Continuity Starting torque Voltage proof (insulated styles only) See D1.1 As in 4.29.6.1 %R: k (- - %R+ - - 7) U 100 M7 As in 4.4.1 - - - mNm to - - - mNm As in 4.29.6.8 Notes on page 10 Licensed Copy: London South Bank University, London South Ban
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