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1、J IS JAPANESE I ND USTRIAL STANDARD Translated and Published by Japanese Standards Association Basic environmental testing procedures Part 2 : Tests Tests Z/BFc : Combined dry heat /vi brat ion (sinusoidal) tests for both heat-dissipating and non-heat-dissipating specimens The code number of this St
2、andard changed from JIS C 0037 to the following from 20 March 2004. JIS C 60068-2-51:1997 ICs 19.040; 19.080 Descriptors : electrical equipment, electronic equipment and components, electrical com- ponents, environmental testing, vibration testing, high-temperature testing Reference number : JIS C 0
3、037 : 1997 (E) PROTECTED BY COPYRIGHT 8 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:55:01 MDTNo reproduction or networking permitted without license from IHS -,-,- C 0037 : 1997 (I
4、EC 68-2-51 1983) Foreword This translation has been made based on the original Japanese Industrial Standard established by the Minister of International Trade and Industry through deliberations at Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law: Date of
5、Establishment: 1997-03-20 Date of Public Notice in Official Gazette: 1997-03-21 Investigated by: Japanese Industrial Standards Committee Divisional Council on Electricity JIS C 0037:1997, First English edition published in 2000-01 Translated and published by: Japanese Standards Association 4-1-24, A
6、kasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JCA2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
7、or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/200
8、7 03:55:01 MDTNo reproduction or networking permitted without license from IHS -,-,- C 0037 1997 (IEC 68-2-51 : 1983) Contents Page 1 2 3 3 4 4 5 6 6 7 7 7 8 8 Introduction . 1 2 3 4 5 6 7 8 9 10 11 12 13 Scope and object . General description . Description of test apparatus Severities Selection of
9、temperature monitoring point and determination of monitoring temperature (applies to heat-dissipating specimens only) Pre-conditioning . Initial measurements Conditioning . Intermediate measurements Recovery Final measurements Criteria of failure Information required in the relevant specification .
10、PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:55:01 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS C
11、60068-2-5111997 (IEC 68-2-51 : 1983) Basic environmental testing procedures Part 2: Tests - Tests Z/BFc: Combined dry heatlvibration (sinusoidal) tests for both heat-dissipating and non-heat -dissipating specimens Introduction This Japanese Industrial Standard has been prepared based on the Ist edit
12、ion issued in 1983 of IEC 68-2-51 Basic environmental testing procedures, Part 2: Tests, Tests Zf BFc: Combined dry heat I vibration (sinusoidal) tests for both heat-dissipating and non-hut-dissiput- ing specimens without changing the technical contents. Furthermore, the matters that are indicated b
13、y underlines (dotted lines) do not appear in the original International Standard. i ) General This Japanese Industrial Standard deals with combined dry heat/vibration (sinusoidal) tests applicable both to heat-dissipating and non-heat-dissipating specimens. It is basically a combination of Test Fc:
14、Vibration (Sinusoidal) (JIS C 0040) and Tests B: Dry Heat (JIS c 0021). The procedures are limited to the case of specimens which reach temperature stability during exposure to high temperature conditions. ii) Vibration The vibration test involved is basically equivalent to Test Fc. One or more of t
15、he endurance procedures of Test Fc may be applied. A vibration response investigation after endurance conditioning is not included in this combined test. iii) Temperature Temperature conditions for testing heat-dissipating specimens are intended to subject the specimen to thermal stresses in a manne
16、r equivalent to that in free air conditions. Because of the difficulties in simulating the effect of free air conditions in a test chamber combined with a vibrator, forced air circulation is normally used for this test. Monitoring is made on the hottest surface point of the specimen. The monitoring
17、point and the monitoring temperature are determined by subjecting the specimen to free air conditions with specified ambient temperature before conducting the test. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001
18、, User=Wing, Bernie Not for Resale, 03/14/2007 03:55:01 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 C O037 : 1997 (IEC 68-2-51 : 1983) editions of the standards listed below. . IEC 68: Basic environmental testing procedures Note: IEC 68: Basic environmental testingpro
19、cedures was renamed, in 1988, IEC 68: _- _- Environmental testing. _- JIS C 0010-1993 Environmental testing Part 1: General and guidance Note: IEC 68-1: 1988 Environmental testing Part 1: General and guidance and Amend- _ _-_-_-_-_-_ ment No.l(l992) are identical to JIS C 0010-1993. JIS C 0021-1995
20、Basic environmental testing procedures Part 2: Tests, Test B: D r y heat Note: IEC 68-2-2: 1974 Environmental testing Part2: Tests- Test B: D r y heat and Amend- . . . ment N O . (1993) are identical to JIS C 0021-1995. _-_-_- JIS C 0040-1995 Basic environmental testingprocedures Part 2: Tests, Test
21、 Fc and guidance: Vibration (sinusoidal) JIS C 0047-1995 Basic environmental testingprocedures Part 2: Tests, Mounting of components, equipment and other articles for dynamic tests including shock (Ea), bump (Eb), vibration (Fc and Fd) and steady-state acceleration (Gu) and guidance Note: IEC 68-2-4
22、7 1982 Environmental testing. Part 2: Tests, Mounting ofcomonents, _- -_-_-_I_ - - - to JIS C 0047-1995. To provide a standard test procedure to determine the suitability of heat-dissipating and non-heat-dissipating components, equipment or other articles for use, storage and transportation under co
23、nditions of high temperature combined with vibration. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:55:01 MDTNo reproduction or networking permitted without lice
24、nse from IHS -,-,- 3 C 0037 : 1997 (IEC 68-2-51 : 1983) 2. General description This test is a combination of Tests B: Dry heat, and Test Fc: Vibration (Sinusoidal). Note. - Tests Bb and Bd require that during the heating and cooling phases of temperature conditioning the rate of change of temperatur
25、e does not exceed I Umin averaged over a period of 5 min. The maximum rate of change of temperature of I Wmin does not apply to specimens which are capable of withstanding thermal shock, that is specimens which are normally subjected to Test Ba and are capable of withstanding rapid change of tempera
26、ture Test Na or Nc. For these specimens, chambers capable of maintaining the conditions specified for Test Ba o r Bc (sudden change of temperature) may be used. Unless the Tests B and Fc have been performed (and the results recorded) a vibration test under laboratory temperature conditions is first
27、performed and the specimen is then subjected to the high temperature until temperature stability has been reached, after which it is subjected to the combination of vibration and high temperature. Test profiles are shown in Figures 1 and 2, pages 9 and 10. The vibration environment could be one or m
28、ore of the following: a) endurance by sweeping; b) vibration response investigation plus endurance at those frequencies derived from the vibration response investigation; c) endurance at pre-determined frequencies. 3. Description of test apparatus 3.1 Test chamber conditions 3. I. 1 Testing o f non-
29、heat-dissipating specimens The test chamber shall comply with the requirements given in Test Ba or Bb as appropriate (see note to Clause 2). 3.1.2 Testing o f heat-dissipating specimens The selection of the temperature monitoring point and the determination of the monitoring temperature can be made
30、either in: a) a chamber, normally provided with forced air circulation, capable of simulating the effects of “free air” conditions at high temperature and complying with the requirements given in Clause 36 of JIS C 0021 concerning Test Bd, or _. b) a chamber or room such that the specimen is protect
31、ed from disturbing influences, such as sunlight and draughts (see Sub-clause 5.1.2). The chamber used for the test shall normally include forced air circulation and shall comply with the requirements given in Clause 25 of JIS C 0021 concerning Test Bc and Clause 36 concerning. Test Bd. -.-._ PROTECT
32、ED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:55:01 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 C 0037 : 1997 (IEC 68-2-51 : 1983) 3.2 R
33、equirements for the vibration system 3.2.1 Mounting The requirements on mounting given in Test Fc shall be applied. However, should the temperature of the upper surface of the table differ from the ambient temperature of the chamber because the test specimen is heat-dissipating, the mounting of the
34、specimen to the table shall have a low thermal conductivity such that, for all practical purposes, thermal isolation is achieved. Notes 1. - Test Fc (fifth edition) refers to JIS C 0047 for mounting requirements and includes guidance on _.-_-_-_ mounting for specimens normally mounted on isolators.
35、2. - Care should be taken in introducing a thermal isolating device that it makes no significant change i n the dynamic behaviour of the specimen and of its mounting within the frequency range of the test. 3.2.2 Vibration system The vibration system shall comply with the requirements given in Test F
36、c. 4. Severities The severities of vibration levels, frequency ranges and durations shall be chosen from the list given in Test Fc. The temperature values shall be chosen from the lists given in Tests B. The endurance conditioning starts from the point where temperature stability of the specimen has
37、 been reached. 5. Selection of temperature monitoring point and determination of monitoring temperature (applies to heat-dissipating specimens only) 5.1 Specimens without artificial cooling 5.1.1 Using a chamber capable of simulating the effects o f “free air conditions” at high temperatures 5.1.1.1
38、 The specimen shall be placed in a chamber with the characteristics given in Item a) of Sub-clause 3.1.2 and be switched on. 5.1.1.2 The ambient temperature of the chamber shall then be adjusted to the value appropriate to the degree of severity and time shall be allowed for the specimen to reach te
39、mperature stability. Nores I. - Ambient temperature is defined in Sub-clause 4.6 of JIS C O010 ._ 2. - f i e temperature stability is defined in Sub-clause 4.8 of JIS C O010 _ _ _ _ _ _ _ _ _ _ _ _ _ PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with J
40、SALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:55:01 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 C 0037 : 1997 (IEC 68-2-51 : 1983) 5.1.1.3 The hottest point of the test specimen which is exposed to the surrounding air shall be de
41、termined and selected as the lemperature monitoring point and shall, whenever possible, be identified in the relevant specification. The temperature of this point shall be noted and used as the monitoring temperature. -!Voles I - If the specimen has more than one operational mode giving rise to diff
42、erent surface temperatures, the determination of the monitoring point and the monitoring temperature is normally made with the operational mode causing the highest temperature. 2. - The determination of the temperature mcinitoring point may be very expensive, for example in the case of large specime
43、ns with a complex structure, it is recommended, and particularly in such cases, that the temperature monitoring point be indicated in the relevant specification. 5.1.2 Using a chamber or room capable o f simulating the effects o f yree air conditions” only at laboratory temperature If a chamber capa
44、ble of simulating the effects of free air conditions at high temperatures is not available, the selection. of the temperature monitoring point and the determination of the monitoring temperature may be made at laboratory temperature, using the following procedure. 5.1.2.1 The specimen shall be place
45、d in a chamber or room with the characteristics given in Item b) of Sub-clause 3.1.2 and switched on. 5.1.2.2 Time shall then be allowed for the specimen to reach temperature stability. The hottest point of the test specimen which is exposed to the surrounding air shall be determined and selected as
46、 the temperature monitoring point. The temperature of this point and the ambient temperature of the chamber or mom shall be measured. 5.1.2.3 The monitoring temperature For the test is then determined by use of the nomogram in Annex B of JIS C 0021. -_-_ 5.2 Specimen with artificial cooling 5.2.1 Fo
47、r general precautions, terminology etc., see the corresponding clauses in Test Bd. 5.2.2 Cooling system “isolated” from the chamber The temperature monitoring point and monitoring temperature shall be determined in accordance with Sub-clause 5.1.1. The alternative method given in Sub-clause 5.1.2 cannot be used in this case. 5.2.3 Cooling system not isolated” from the chamber The determination of the temperature monitoring point and the monitoring temperature shall be made in accordance wi