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BS ISO 9022-14:2015 pdf free

BS ISO 9022-14:2015 pdf free.Optics and photonics – Environmental test methods
This part of ISO 9022 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 dew, hoarfrost or ice.
The purpose of testing is to investigate to what extent the optical, climatic, mechanical, chemical, and electrical (including electrostatic) performance characteristics of the specimen are affected by dew, hoarfrost, or ice.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 9022-1, Optics and photonics一Environmental test methods一Part 1: Definitions, extent of testing
ISO 9022-4, Optics and photonics一Environmental test methods一Part 4: Salt mist
General information and test conditions
Exposure to dew, hoarfrost, or ice is effected by rapid change of the environmental conditions in a chamber or by transferring the specimen from a cold chamber to a conditioned room. Instrument parts not exposed to hoarfrost or icing conditions during normal use should be protected from exposure to such conditions during test.
Table 1 shows the conditioning methods 75 (dew), 76 (hoarfrost followed by the process of thawing), and 77 (ice covering followed by the process of thawing). Conditioning method 77 (ice covering followed by the process of thawing) includes two types of ice formation (see Annex A for details):
一rime ice: degree of severity 01 applies;
一glazed ice: degrees of severity 02 to 04 apply.
After temperature stabilization of the specimen in step 1, proceed to step 2 and heat the test chamber to -5 °C. Produce hoarfrost by directing water vapour or atomized spray against the specimen, using a fine nozzle spray gun arranged at a distance of 0,5 m from the specimen.
If state of operation 2 is required, perform an intermediate test after completion of step 2, immediately proceed to step 3, and perform another intermediate test during the process of thawing.BS ISO 9022-14 pdf download.

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