DIN ISO 9022-5:1999-05

The document specifies methods for the testing of optical instruments and instruments containing optical components, under equivalent conditions, for their ability to resist the combined influence of cold and low air pressure, including the potential condensation and freezing of water simultaneously on the instrument under test. The purpose of testing is to investigate to what extent the optical, thermal, mechanical, chemical and electrical performance characteristics of the specimen are affected by low temperature and low air pressure.