NBN ISO 9022-23:2023

< p class=" MsoBodyText" style=" mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > This document specifies the methods relating to the environmental tests of optical instruments including additional assemblies from other fields (e.g. mechanical, chemical, and electronic devices), under equivalent conditions, for their ability to resist the influence of low pressure combined with cold, including the potential condensation and freezing of moisture, ambient temperature, and dry or damp heat.< / span>

< p class=" MsoBodyText" style=" mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > This document is applicable to optical instruments including additional assemblies from other fields, designed for operation and/ or transport in high mountainous areas or on board aircraft or missiles.< / span>

< p class=" MsoBodyText" style=" mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > The purpose of the testing is to investigate to what extent optical, climatic, mechanical, chemical, and electrical (including electrostatic) performance characteristics of the specimen are affected by combined low pressure and low, ambient, or high temperature. Furthermore, the additional effects of moisture condensing and freezing on the instrument or components can be determined. Examples are instruments which are installed or externally mounted on aircraft or missiles or transported inside aircraft or flying objects not providing any pressure equalization.< / span>

< p class=" MsoBodyText" style=" mso-layout-grid-align: none text-autospace: none " > < span class=" citeapp" > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt color: black mso-color-alt: windowtext " > Annex A< / span> < / span> < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > explains the intent of the different types of tests.< / span>