This part of IEC 60068 demonstrates the adequacy of specimens to resist dynamic loads without unacceptable degradation of its functional and/or structural integrity when subjected to the specified vibration test requirements as defined by a time history (long time history replication). These can either be recorded in measurement exercises or generated artificially. In both cases, this method allows for generating a test tailored to very specific applications.

Typical applications are tests in which very specific deterministic transient, periodical or random excitation is necessary and the characteristics of the motion are not covered by other test standards. This includes time histories not sufficiently represented by the standard shock tests of IEC 60068-2-27 [2] or a general description by a shock response spectrum as in IEC 600682-81 [3], periodical vibration that is not covered by a sinusoidal waveform as in IEC 60068-2-6, and random vibration that is not covered by the description of Gaussian or non-Gaussian (high kurtosis) broad-band random vibration of IEC 60068-2-64. However, the user is made aware that long time history replication uses a deterministic time history. Simulation of random vibration of any kind is approximated by quasi-random.

In addition, additional mixed mode tests are possible with this test method by generating time histories that are representations of the required test signals. This includes tests of high complexity.

Cross References:
EN 60068-2-6
EN 60068-2-47
IEC 60068-2-6
IEC 60068-2-47
EN 60068-2-64:2008
IEC 60068-2-64:2008
IEC 60721-3
IEC 60068-1
IEC 60068-2-27
IEC 60068-5-2
IEC 60068-3-8
IEC 60050-300
IEC 60068-2-81
DIN ENV 13005
IEC 60068-2-57
ISO 2041
ISO/IEC 17025:2017


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