JIS-C-60068-2-7-1993-R2005-ENG.pdf
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1、J IS JAPANESE I NDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Basic environmental testing procedures Part 2 I Tests- Test Ga and guidance: Acceleration, steadv state - The code number of this Standard changed from JIS C 0045 to the following from 20 March 2004. JIS C
2、60068-2-7:1993 ICs 19.080; 19.040 Descriptors : electrical and electronic testing; environmental testing Reference number : JIS C 0045 : 1993 (E) PROTECTED BY COPYRIGHT s C 0045 : 1993 (IEC 68-2-7 1983) Foreword This translation has been made based on the original Japanese Industrial Standard establ
3、ished by the Minister of International Trade and Industry through deliberations at Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law: Date of Establishment: 1993-10-01 Date of Public Notice in Official Gazette: 1993-10-13 Investigated by: Japanese Industri
4、al Standards Committee Divisional Council on Electronics JIS C 0045 : 1993, First English edition published in 2000-01 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS
5、 is to be the final authority. O JSA2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed i
6、n Japan PROTECTED BY COPYRIGHT -,-,- JAPANESE INDUSTRIAL STANDARD JIS C 60068-2-7:1993 (IEC 68-2-7 : 1983) Basic environmental testing procedures Part 2: Tests - Test Ga and guidance: Acceleration, steady state Foreword for Japanese Industrial Standard This Japanese Industrial Standard has been prep
7、ared based on the 2nd edition issued in 1983 of IEC 68-2-7 (Basic environmental testing procedures, Part 2: Tests, Test Ga and guidance: Acceleration, steady state) and 1986 Amendment No. 1 without changing the technical contents. Furthermore, the “Informative references“ that are indicated by under
8、line (dotted line) do not appear in the original International Standard. 1. Scope To prove the structural suitability and the satisfactory performance of components, equipment and other electrotechnical products, hereinafter referred to as “specimens“, when subjected to forces produced by steady acc
9、eleration environments (other than gravity) such as occur in moving vehicles, especially flying vehicles, rotating parts and projectiles, and to provide a test of structural integrity for certain components. 2. General of test Equipment, components and other electrotechnica1 products intended to be
10、installed in moving bodies will be subjected to forces caused by steady accelerations. Naturally, such an environment is most pronounced in flying vehicles and rotating machinery, although in certain conditions accelerations in land vehicles may be of significant magnitude. In general, the acdelerat
11、ions encountered in service have different values along each of the major axes of the moving body, and, in addition, usually have different values in the opposite senses of each axis. If the attitude of the specimen is not fixed with regard to the moving body, then the relevant specification should
12、prescribe a level, which may be applied along each of the major axes and senses of the specimen, having taken into account the maximum accelerations in different axes of the moving body. This standard is to be used in conjunction with JIS C 0010: 1993 Environmental testing Part 1: General and guidan
13、ce. PROTECTED BY COPYRIGHT -,-,- 2 C 0045 : 1993 (IEC 68-2-7 : 1983) 3. Conditions for testing 3.1 3.1.1 3.1.2 Characterisrics o f rhe test apparatus General Acceleration conditions are applied by means of a centrifuge where the acceleration is directed towards the centre of the rotating system. In
14、certain special cases, however, the specimen may be sensitive to gyroscopic couples, and it may only be possible to perform the test by using a machine capable of applying linear acceleration, in which case the relevant specification shall state this requirement. Tangential acceleration When increas
15、ing the rotational speed of a centrifuge from zero to the value necessary to achieve the specified acceleration, or when decreasing back to zero, the machine shall be so controlled that the specimen is not subjected to a value of tangential acceleration greater than 10% of the specified acceleration
16、. 3.1.3 Acceleration gradient The dimensions of a centrifuge relatiue to the specimen shall be such that no part of the specimen, other than flying leads, shall be subjected to a value of acceleration outside the tolerances given in Sub-clause 3.1.4. 3.1.4 Acceleration tolerance If the linear dimens
17、ions of the specimen are less than 10 cm, the acceleration on all parts of the specimen (excluding flying leads) shall not depart from the specified steady-state acceleration by more than * 10%. In other cases, the tolerance on the. specified steady-state acceleration is - 10% +30%. 3.2 Mounting The
18、 specimen shall be mounted on the test apparatus in accordance with the requirements in JIS C 0040-1987, Appendix D: Basic Environmental Testing Procedures, Mounting of Components, Equipment and Other Articles for Dynamic Tests and Guidance. Nore. - For reasons of safety, care should be taken to pre
19、vent the specimens under test from being thrown off if the mounting attachments are broken but any safety devices used should not introduce additional constraint during the test. PROTECTED BY COPYRIGHT Y C 0045 : 1993 (IEC 68-2-7 : 1983) 4. Severity The relevant specification shall prescribe an acce
20、leration value for the test, chosen, where possible, from the standard values listed below. It shall also prescribe the angle, with respect to the axes of the specimen, at which this acceleration is to be applied, where it is necessary (Clauses Al, A2 and B2). The standard levels of test are: 1 Acce
21、leration 30 50 100 200 500 lo00 ZOO0 5000 10 o00 20 O00 50 O00 100 o00 200 o00 300 M30 500 O00 Note. - The value prescribed for the acceleration should take into account the purpose of the test, whether it is to be made for checking the structural integrity of the specimen or to assess the ability o
22、f the specimen to withstand the forces occumng in moving vehicles or rotating machinery. 5. Initial measurements The specimen shall be submitted to the visuaI, dimensional and functional checks prescribed by the relevant specification. 6. Conditioning: procedure for testing with a centrifuge 6.1 Unl
23、ess otherwise stated in the relevant specification, the acceleration conditioning shall be imposed in both senses of three mutually perpendicular axes in turn, which shall be the three major axes. 6.2 The centrifuge shall be rotated at the speed necessary to produce the specified level. 6.3 The nece
24、ssary speed of rotation shall be maintained for not less than 10 s or for a period stated in the relevant specification. 6.4 The relevant specification shall prescribe which of the following conditions of functioning or survival has to be satisfied and the corresponding acceleration level(s) (Clause
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