scope:

This Standard specifies the shock test for components, equipments, and other electrotechnical products (hereafter referred to as "specimens") which during transportation, storage and handling, or in use, may be subjected either to conditions involving relatively infrequent non-repetitive ¹⁾ or repetitive ²⁾ shocks.

Notes ¹⁾ Non-repetitive shock tests were referred to as "shock tests in JIS C 60068-27 : 1995, before the revision.

²⁾ Repetitive shock tests were referred to as "bump tests" in JIS C 60068-2-29, which was withdrawn when this Standard was revised.

The shock test basically consists of subjecting a specimen either to non-repetitive or repetitive shocks of standard pulse shapes with specified peak acceleration and duration.

The purpose of this test is to reveal mechanical weakness and/or degradation in specified performances, 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 case. When used in conjunction with JIS C 60068-2-47, this Standard may be used for testing packaged products. 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.

NOTE 1 As for mounting method of packaged products, see JIS C 60068-2-47.

This Standard is written in terms of prescribed pulse shapes. Guidance for the selection and application 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 the shock testing machine during testing.

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

IEC 60068-2-27: 2008 Environmental testing-Part 2-27: Tests-Test Ea and guidance: Shock (lDT)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/ IEC Guide 21-1.