3 Testing
3.1 General parameters
such as temperatures, cold, dry heat, temperature change, type of vibration exposure time to temperature, exposure time to vibration, number of shocks, repetition time of shocks, axis of shock or vibration, state of operation and so on, shall be selected from thel relevant IEC 60068-2 standards or relevant specification.
The combinations of environmental conditions should be selected to ensure that electrical andl mechanical performances of the specimen are satisfactory under storage, transportation andl operational conditions. Certain combinations of possible tests shown in Table 1 may not be practicable.
Examples of these include the following:
-full sweep of sinusoidal vibration spectrum not completed during change of temperature or temperature cycling;
-temperature stabilization of dynamic non linear systems, e.g. anti vibration mounts during vibration with change of temperature or temperature cycling;
- full cycle of mixed mode vibration during change of temperature or temperature cycling.
shocks, axis of shock or vibration, state of operation and so on, shall be selected from thel relevant IEC 60068-2 standards or relevant specification. The combinations of environmental conditions should be selected to ensure that electrical andl mechanical performances of the specimen are satisfactory under storage, transportation andl operational conditions. Certain combinations of possible tests shown in Table 1 may not be practicable. Examples of these include the following: full sweep of sinusoidal vibration spectrum not completed during change of temperature or temperature cycling; temperature stabilization of dynamic non linear systems, e.g. anti vibration mounts during vibration with change of temperature or temperature cycling; full cycle of mixed mode vibration during change of temperature or temperature cycling.
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