標準號：IEC 60068-2-27-2008
中文標準名稱：環境試驗.第2-27部分:試驗.試驗Ea和指南:沖擊
英文標準名稱：Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock
標準類型：A21
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：A21
國際標準分類號：19.040
引用標準：IEC 60068-1;IEC 60068-2-47-2005;IEC 60068-2-55;IEC 60721-3-1;IEC 60721-3-5;Guide 104
適用范圍：This part of IEC 60068 provides a standard procedure for determining the ability of a specimento 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 withthe relevant specification, this may be used in some cases to determine the structural integrityof 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 testedunpackaged, it is referred to as a test specimen. However, if the item is packaged, then theitem itself is referred to as a product and the item and its packaging together are referred to asa test specimen. When used in conjunction with IEC 60068-2-47, this standard may be used fortesting packaged products. This possibility was included in the 2005 version of IEC 60068-2-47for 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 pulseshapes are discussed in Annex B.Wherever possible, the test severity and the shape of the shock pulse applied to the specimenshould be such as to reproduce the effects of the actual transport or operational environmentto which the specimen will be subjected, or to satisfy the design requirements if the object ofthe 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.NOTE The term “shock testing machine” is used throughout this standard, but other means of applying pulseshapes are not excluded.One of the responsibilities of a technical committee is, wherever applicable, to make use ofbasic safety publications in the preparation of its publications.