This part of GB/T 2423 deals with cold tests applicable to both non heat-dissipating and heat-dissipating specimens. Tests Ab and Ad do not deviate essentially from earlier issues1). Test Ae has been added primarily for testing equipment that requires being operational throughout the test, including the conditioning periods.
The object of the cold test is limited to the determination of the ability of components, equipment or other articles to be used, transported or stored at low temperature.
Cold tests covered by this standard do not enable the ability of specimens to withstand or operate during the temperature variations to be assessed. In this case, it would be necessary to use GB/T 2423.22.
The cold tests are subdivided as follows:
? Cold tests for non heat-dissipating specimens
? with gradual change of temperature, Ab;
? Cold test for heat-dissipating specimens
? with gradual change of temperature, Ad,
? with gradual change of temperature, specimen powered throughout, Ae.
The procedures given in this standard are normally intended for specimens that achieve temperature stability during the performance of the test procedure.
2 Normative References
The following documents contain provisions which, through reference in this part of GB/T 2423, become provisions of this part. For dated reference, subsequent modification (excluding corrigendum content) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document referred to applies.
