scope:

This publication deals with combined cold (with gradual change of temperature) and low air pressure tests for both heat-dissipating and non-heat-dissipating specimens. The object of the test is to determine the ability of components or equipment or other articles to be stored and used under a simultaneous combination of low temperature and low air pressure. This combined test should normally be used only if the effects of combined environments will not be relevated by subjecting the specimen to single environments. The procedures given in this publication are limited to the case of specimens which achieve temperature stability during the test procedure. In the case of testing heat-dissipating specimens, this procedure applies only the testing of one specimen at a time.