BS EN 60068-2-27-2009 环境试验.第2-27部分:试验.试验Ea和导则.冲击

标准号：BS EN 60068-2-27-2009
中文标准名称：环境试验.第2-27部分:试验.试验Ea和导则.冲击
英文标准名称：Environmental testing - Part 2-27:Tests - Test Ea and guidance - Shock
标准类型：K04
发布日期：2009/7/31 12:00:00
实施日期：2009/7/31 12:00:00
中国标准分类号：K04
国际标准分类号：19.040
引用标准：IEC 60068-1;IEC 60068-2-47-2005;IEC 60068-2-55;IEC 60721-3-1;IEC 60721-3-5;Guide 104
适用范围：This part of IEC 60068 provides a standard procedure for determining the ability of a specimen to withstand specified severities of non-repetitive or repetitive shocks.The purpose of this test is to reveal mechanical weakness and/or degradation in specifiedperformances, or accumulated damage or degradation caused by shocks. In conjunction with the relevant specification, this may be used in some cases to determine the structural integrity of specimens or as a means of quality control (see Clause A.2).This test is primarily intended for unpackaged specimens and for items in their transport casewhen the latter may be considered to be part of the specimen. If an item is to be tested unpackaged, it is referred to as a test specimen. However, if the item is packaged, then the item itself is referred to as a product and the item and its packaging together are referred to as a test specimen. When used in conjunction with IEC 60068-2-47, this standard may be used for testing packaged products. This possibility was included in the 2005 version of IEC 60068-2-47 for the first time.This standard is written in terms of prescribed pulse shapes. Guidance for the selection andapplication of these pulses is given in Annex A and the characteristics of the different pulse shapes are discussed in Annex B.Wherever possible, the test severity and the shape of the shock pulse applied to the specimen should be such as to reproduce the effects of the actual transport or operational environment to which the specimen will be subjected, or to satisfy the design requirements if the object of the test is to assess structural integrity (see Clauses A.2 and A.4).For the purposes of this test, the specimen is always mounted to the fixture or the table of theshock testing machine during testing.One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications.