ISO 9022-23:2023
(Main)Optics and photonics — Environmental test methods — Part 23: Low pressure combined with cold, ambient temperature and dry or damp heat
Optics and photonics — Environmental test methods — Part 23: Low pressure combined with cold, ambient temperature and dry or damp heat
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. 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. 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. Annex A explains the intent of the different types of tests.
Optique et photonique — Méthodes d'essais d'environnement — Partie 23: Basse pression combinée à la température ambiante et froide et à la chaleur sèche ou humide
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INTERNATIONAL ISO
STANDARD 9022-23
Third edition
2023-04
Optics and photonics —
Environmental test methods —
Part 23:
Low pressure combined with cold,
ambient temperature and dry or damp
heat
Optique et photonique — Méthodes d'essais d'environnement —
Partie 23: Basse pression combinée à la température ambiante et
froide et à la chaleur sèche ou humide
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General information and test conditions . 1
5 Conditioning . 2
5.1 Conditioning method 45 — Low ambient pressure combined with ambient
temperature . 2
5.2 Conditioning method 46 — Low ambient pressure combined with dry heat . 2
5.3 Conditioning method 47 — Low internal pressure combined with damp heat,
pressure difference low . 3
5.4 Conditioning method 48 — Low internal pressure combined with damp heat,
pressure difference medium . 4
5.5 Conditioning method 49 — Low internal pressure combined with damp heat,
pressure difference high . 5
5.6 Conditioning method 50 — Low ambient pressure combined with cold, including
hoarfrost and dew . 5
5.7 Conditioning method 51 — Low ambient pressure combined with cold, without
hoarfrost and dew . 5
6 Procedure .6
6.1 General . 6
6.2 Procedure for conditioning method 45 . 6
6.3 Procedure for conditioning method 46 . 6
6.4 Procedure for conditioning method 47 . 7
6.4.1 Initial and final inspection . 7
6.4.2 Preliminary test 1 . 7
6.4.3 Preliminary test 2 . 7
6.4.4 Condition 1 . . 7
6.4.5 Conditions 2 and 3 . 7
6.5 Procedure for conditioning method 48 . 7
6.5.1 Initial and final inspection . 7
6.5.2 Preliminary test . 8
6.5.3 Condition 1 . . 8
6.5.4 Conditions 2 and 3 . 8
6.6 Procedure for conditioning method 49 . 8
6.6.1 Initial and final inspection . 8
6.6.2 Preliminary test . 8
6.6.3 Conditions 3 and 4 . 8
6.7 Procedure for conditioning method 50 . 8
6.8 Procedure for conditioning method 51. 9
7 Environmental test code . 9
8 Specification . 9
Annex A (informative) Explanatory notes .11
Bibliography .13
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 172, Optics and Photonics, Subcommittee
SC 1, Fundamental standards.
This third edition cancels and replaces the second edition (ISO 9022-23:2016), which has been
technically revised.
The main changes are as follows:
— Introductory sentences of 5.3, 5.4 and 5.5 were clarified,
— Clause 3 was included and the document renumbered.
A list of all parts in the ISO 9022 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
Optical instruments are affected during their use by a number of different environmental parameters
which they are required to resist without significant reduction in performance and to remain within
defined specifications.
The type and severity of these parameters depend on the conditions of use of the instrument (for
example, in the laboratory or workshop) and on its geographical location. The environmental effects
on optical instrument performance in the tropics and subtropics are totally different from those found
when they are used in arctic regions. Individual parameters cause a variety of different and overlapping
effects on instrument performance.
The manufacturer attempts to ensure, and the user naturally expects, that instruments will resist the
likely rigours of their environment throughout their life. This expectation can be assessed by exposure
of the instrument to a range of simulated environmental parameters under controlled laboratory
conditions. The severity of these conditions is often increased to obtain meaningful results in a
relatively short period of time.
In order to allow assessment and comparison of the response of optical instruments to appropriate
environmental conditions, the ISO 9022 series contains details of a number of laboratory tests which
reliably simulate a variety of different environments. The tests are based largely on IEC standards,
modified where necessary to take into account features special to optical instruments.
As a result of continuous progress in all fields, optical instruments are no longer only precision-
engineered optical products, but, depending on their range of application, also contain additional
assemblies from other fields. For this reason, the principal function of the instrument is to be assessed
to determine which International Standard should be used for testing. If the optical function is of
primary importance, then the ISO 9022 series is applicable, but if other functions take precedence, then
the appropriate International Standard in the field concerned should be applied. Cases may arise where
application of both the ISO 9022 series and other appropriate International Standards will be necessary.
v
INTERNATIONAL STANDARD ISO 9022-23:2023(E)
Optics and photonics — Environmental test methods —
Part 23:
Low pressure combined with cold, ambient temperature
and dry or damp heat
1 Scope
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.
This document is applicable to optical instruments including additional assemblies from other fields,
design
...
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