BS 5772-6-1984 Specification for electromechanical components for electronic equipment basic testing procedures and measuring methods - Climatic tests and soldering tests《电子设备用机电元件.pdf

1、BRITISH STANDARD BS 5772-6: 1984 IEC 512-6: 1984 Basic testing procedures and measuring methods for electromechanical components for electronic equipment Part 6: Climatic tests and soldering tests UDC 621.316.54.001.4:620.193.2+621.791.35.08BS5772-6:1984 This British Standard, having been prepared u

2、nder the directionof the Electronic Components Standards Committee, was published underthe authority of the Board ofBSI and comes into effect on 30November1984 BSI 08-1999 First published November1979 First revision November1984 The following BSI references relate to the work on this standard: Commi

3、ttee reference ECL/21 Draft for comment 78/27031 DC ISBN 0 580 14147 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Electronic Components Standards Committee (ECL/-) to Technical CommitteeECL/21 upon which the following bodies were re

4、presented: British Telecommunications Electronic Components Industry Federation Electronic Engineering Association Ministry of Defence National Supervising Inspectorate Society of British Aerospace Companies Limited Telecommunication Engineering and Manufacturing Association (TEMA) Amendments issued

5、 since publication Amd. No. Date of issue CommentsBS5772-6:1984 BSI 08-1999 i Contents Page Committees responsible Inside front cover National foreword ii Scope 1 Section 1. Climatic tests 1 Test 11a: Climatic sequence 1 2 Test 11b: Combined/sequential cold, low air pressure and damp heat 2 3 Test 1

6、1c: Damp heat, steady state 3 4 Test 11d: Rapid change of temperature 4 5 Test 11e: Mould growth 4 6 Test 11f: Corrosion, salt mist 5 7 Test 11g: Corrosion, industrial atmosphere (under consideration) 5 8 Test 11h: Sand and dust (under consideration) 5 9 Test 11i: Dry heat 5 10 Test 11j: Cold 6 11 T

7、est 11k: Low air pressure 6 12 Test 11m: Damp heat, cyclic 7 13 Test 11n: Gas tightness, solderless wrapped connections 8 Section 2. Soldering tests 14 Test 12a: Solderability, wetting, solder bath method 8 15 Test 12b: Solderability, wetting, iron method 9 16 Test 12c: Solderability, dewetting 10 1

8、7 Test 12d: Resistance to soldering heat, solder bath method 10 18 Test 12e: Resistance to soldering heat, iron method 10 Publications referred to Inside back coverBS5772-6:1984 ii BSI 08-1999 National foreword This revision of this British Standard has been prepared under the direction of the Elect

9、ronic Components Standards Committee. It is identical with IEC Publication512-6:1984 “Electromechanical components for electronic equipment; basic testing procedures and measuring methods Part6: Climatic tests and soldering tests,” published by the International Electrotechnical Commission (IEC). Th

10、is Part of BS5772 supersedes BS5772-6:1979, which is withdrawn. This Part should be read in conjunction with BS5772-1 “General” and BS5772-2 “General examination, electrical continuity and contact resistance tests, insulation tests and voltage stress tests”. Terminology and conventions. The text of

11、the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards. Cross-references International Standard Corresponding British Standard BS 2011 Basic envi

12、ronmental testing procedures IEC 68-2-1:1974 Part 2.1A:1977 Test A. Cold (Identical) IEC 68-2-2:1974 Part 2.1B:1977 Tests B. Dry heat (Identical) IEC 68-2-3:1969 Part 2.1Ca:1977 Test Ca. Damp heat, steady state (Identical) IEC 68-2-10:1968 Part 2.1J:1977 Test J. Mould growth (Identical) IEC 68-2-11:

13、1981 Part 2.1Ka:1982 Test Ka. Salt mist (Identical) IEC 68-2-13:1983 Part 2.1M:1984 Test M. Low air pressure (Identical) IEC 68-2-14:1974 Part 2.1N:1977 Test N. Change of temperature (Identical) IEC 68-2-20:1979 Part 2.1T:1981 Test T. Soldering (Identical) IEC 68-2-30:1980 Part 2.1Db:1981 Test Db an

14、d guidance: Damp heat, cyclic(12+12 hour cycle) (Identical) IEC 68-2-39:1976 Part 2.1Z/AMD:1977 Test Z/AMD. Combined sequential cold, low air pressure and damp heat test (Identical) IEC 352-1:1983 BS 6516 Solderless connections Part 1:1984 Specification for solderless wrapped connections. General re

15、quirements, test methods and practical guidance (Identical) BS 5772 Specification for electromechanical components for electronic equipment: basic testing procedures and measuring methods IEC 512-2:1976 Part 2:1979 General examination, electrical continuity and contact resistance tests, insulation t

16、ests and voltage stress tests (Identical)BS5772-6:1984 BSI 08-1999 iii A British Standard does not purport 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 imm

17、unity from legal obligations. International Standard Corresponding British Standard IEC 512-5:1977 Part 5:1979 Impact tests (free components), static load tests (fixed components), endurance tests and overload tests (Identical) Summary of pages This document comprises a front cover, an inside front

18、cover, pagesi toiv, pages1to12, an inside back cover 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.iv blankBS5772-6:1984 BSI 08-1999 1 Scope The tests contained i

19、n this standard, when required by the detail specification, shall be used for electromechanical components within the scope of Technical Committee No.48 1) . They may also be used for similar devices when specified in a detail specification. Section 1. Climatic tests 1 Test 11a: Climatic sequence 1.

20、1 Object The object of this test is to define a standard test method to assess the ability of a component to function in a specified manner in a specified environment which might be encountered during normal use, including storage. 1.2 Preparation of the specimen 1.2.1 Mechanical preparation The spe

21、cimen, equipped with normal accessories, shall be mounted and wired in accordance with the detail specification. When required by the detail specification, the specimen shall be operated the number of times specified prior to the test. For each test carried out, the detail specification shall specif

22、y the condition of the component, for example operated or non-operated, mated or unmated. 1.2.2 Preconditioning Preconditioning shall be carried out in accordance with the requirements of the detail specification. 1.3 Test method 1.3.1 Initial measurements Initial measurements shall be carried out i

23、n accordance with the detail specification. 1.3.2 Dry heat 1.3.2.1 This test shall be carried out in accordance with Test11i, using the specified degree of severity. 1.3.2.2 The specimen shall be exposed to the specified temperature for a period of16h. At the end of this period and while still at hi

24、gh temperature, the insulation resistance shall be measured using Test3a of IEC Publication512-2: Electromechanical Components for Electronic Equipment; Basic Testing Procedures and Measuring Methods. Part2:General Examination, Electrical Continuity and Contact Resistance Tests, Insulation Tests and

25、 Voltage Stress Tests, and shall be not less than the value specified by the detail specification. 1.3.2.3 The specimen shall then be allowed to recover under standard conditions as specified in Test11i. 1.3.3 Damp heat, cyclic, first cycle 1.3.3.1 This test shall be carried out in accordance with T

26、est11m, using the specified degree of severity. 1.3.3.2 The specimen shall be subjected to this test for one cycle of24h. 1.3.3.3 The specimen shall then be allowed to recover under standard conditions as specified in Test11m. 1.3.4 Cold 1.3.4.1 This test shall be carried out in accordance with Test

27、11j, using the specified degree of severity. 1.3.4.2 The specimen shall be exposed to the specified temperature for a period of2h. 1.3.4.3 The specimen shall then be allowed to recover under standard conditions as specified in Test11j. 1.3.4.4 The specimen shall then be visually inspected and shall

28、show no sign of deterioration. 1.3.5 Low air pressure 1.3.5.1 This test shall be carried out in accordance with Test11k, using the specified degree of severity. 1.3.5.2 The duration of the test shall be5min, unless otherwise specified. 1.3.5.3 During this test, Tests4a and4b of IEC Publication512-2s

29、hall be carried out where specified. 1.3.5.4 During and after this test, there shall be no sign of glow discharge, breakdown, flashover or harmful deterioration of the specimen. 1) Scope of Technical Committee No.48: To prepare International Standards regarding components having an inherent electrom

30、echanical connecting or switching function, intended for use in equipment for telecommunication and in electronic devices employing similar techniques. NOTE 1R.F. connectors will not be dealt with by this Technical Committee as they will be covered by Technical Committee No.46 together with r.f. cab

31、les. NOTE 2Sockets for components such as crystals or electronic tubes shall be considered in co-operation with the relevant Technical Committee.BS5772-6:1984 2 BSI 08-1999 1.3.6 Damp heat, cyclic, remaining cycle(s) 1.3.6.1 This test shall be carried out in accordance with Test11m, using the specif

32、ied degree of severity. 1.3.6.2 The specimen shall be subjected to this test for the remaining number of cycles. 1.3.6.3 The specimen shall then be allowed to recover under standard conditions as specified in Test11m. 1.4 Final measurements The specimen shall then be subjected to the following tests

33、 as described in the different parts of IEC Publication512and shall meet the requirements specified by the detail specification: a) insulation resistance (Test3a); b) voltage proof (Test4a); c) contact resistance tests, as specified in the detail specification (Test2); d) mechanical operating tests

34、(Test13), as applicable; e) cable clamping tests (Test17), as applicable; f) visual examination (Test1a), as applicable. NOTE 1The first two tests shall be carried out immediately following the final recovery period. NOTE 2The specimen shall not be disturbed prior to the first measurement of contact

35、 resistance after exposure. NOTE 3When required by the detail specification, the specimen shall be operated three times and then tested for electrical continuity and contact resistance. 1.5 Details to be specified When this test is required by the detail specification, the following details shall be

36、 specified: a) method of mounting and wiring the specimen and operated condition of the component(s), if applicable; b) preconditioning time; c) initial measurements; d) severity of each step of the climatic sequence; e) minimum value of the insulation resistance at high temperature; f) when the low

37、 air pressure test is applicable, the tests to be used and the value of the test voltage; g) when the contact resistance test is applicable, the test to be used; h) requirements for the final measurements; i) applicable operational characteristics; j) any deviation from the standard test method. 2 T

38、est11b: Combined/sequential cold, low air pressure and damp heat 2.1 Object The object of this test is to define a standard test method to assess the ability of a component to function in a specified manner during and after subjection to the conditions which prevail, to some extent, everywhere in an

39、 aircraft during ascent and descent, but which are particularly severe in unheated and/or unpressurized zones. 2.2 Preparation of the specimen The specimen shall be wired as prescribed by the detail specification. If, exceptionally, any feature of the specimen (for example, the rear ends of the cont

40、acts of hermetically sealed fixed connectors) are to be protected in any way, the protection shall be in accordance with the detail specification. Arrangements necessary for any monitoring required by the detail specification shall be made. The state of the specimen, for example whether operated or

41、not, or whether connectors are to be inserted or withdrawn/engaged or disengaged, shall also be in accordance with the detail specification. 2.3 Test method If required by the detail specification, the component shall be preconditioned as prescribed. The component shall be placed, in the attitude pr

42、escribed by the detail specification, in the test chamber. Any functional checks or measurements required by the detail specification shall be made before conditioning begins. The polarizing voltage, if any, shall be applied according to the detail specification. Any leakage current resulting from s

43、uch application is not to be taken into account. Except when necessary for a functional check prescribed by the detail specification, at no time during the conditioning shall the component carry current. The component shall then be subjected to the conditioning described in IEC Publication68-2-39: B

44、asic Environmental Testing Procedures, Part2:Tests Test Z/AMD: Combined Sequential Cold, Low Air Pressure, and Damp Heat Test, using the extremes of cold and low air pressure given in the detail specification. At the junctures indicated in Test Z/AMD during and immediately at the conclusion of the c

45、onditioning, the functional checks and measurements prescribed in the detail specification shall be made.BS5772-6:1984 BSI 08-1999 3 2.4 Details to be specified When this test is required by the detail specification, the following details shall be specified: a) preconditioning, if any; b) type and s

46、ize of wire to be used; c) preparation of the specimen, including details of the protection (if any) to be afforded to any part of the component; d) the attitude in which the component is to be tested; e) initial measurements; f) polarizing voltage; g) operating conditions; h) measurements required;

47、 i) temperature and air pressure; j) number of cycles; k) any deviation from the standard test method. 3 Test 11c: Damp heat, steady state 3.1 Object The object of this test is to define a standard test method to assess the ability of a component to be stored and/or to function in a specified manner

48、 under conditions of high relative humidity. 3.2 Preparation of the specimen 3.2.1 Mechanical preparation The specimen, equipped with normal accessories, shall be mounted and wired in accordance with the detail specification. When required by the detail specification, the specimen shall be operated

49、the number of times specified prior to the test. For each test carried out, the detail specification shall specify the condition of the component, for example operated or non-operated, mated or unmated. 3.2.2 Preconditioning Preconditioning shall be carried out in accordance with the requirements of the detail specification. 3.3 Test method 3.3.1 Initial measurements When required by the detail specification, the specified initial measurements shall be made under standard atmospheric conditions immediately after preconditioning. 3.3.2 Conditioning Damp heat, steady state,