ISO 9022-7:2015

INTERNATIONAL ISO
STANDARD 9022-7
Redline version
compares Third edition to
Second edition
Optics and photonics —
Environmental test methods —
Part 7:
Resistance to drip or rain
Optique et photonique — Méthodes d’essais environnementales —
Partie 7: Résistance au ruissellement ou à la pluie
Reference number
ISO 9022-7:redline:2015(E)
©
ISO 2015

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ISO 9022-7:redline:2015(E)

IMPORTANT — PLEASE NOTE
This is a mark-up copy and uses the following colour coding:
Text example 1 — indicates added text (in green)
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— indicates added graphic figure
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1.x . — Heading numbers containg modifications are highlighted in yellow in
the Table of Contents
DISCLAIMER
This Redline version provides you with a quick and easy way to compare the main changes
between this edition of the standard and its previous edition. It doesn’t capture all single
changes such as punctuation but highlights the modifications providing customers with
the most valuable information. Therefore it is important to note that this Redline version is
not the official ISO standard and that the users must consult with the clean version of the
standard, which is the official standard, for implementation purposes.
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ISO 9022-7:redline:2015(E)

Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 General information and test conditions . 1
4 Conditioning . 1
4.1 Conditioning Method 72 — method 72: Drip . 1
4.2 Conditioning Method 73 — method 73: Steady rain. 2
4.3 Conditioning Method 74 — method 74: Driving rain . . 2
5 Procedure. 2
5.1 General . 2
5.2 Preconditioning . 2
5.3 Recovery . 2
5.4 Final test . 2
6 Environmental test code . 3
7 Specification .11
Annex A (informative) Explanatory notes .12
Bibliography .17
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ISO 9022-7:redline:2015(E)

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.
International Standards areThe 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 rules given ineditorial rules of the ISO/IEC Directives, Part 2 (see www.iso.
org/directives).
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
ISO 9022-7 was prepared by Technical CommitteeThe committee responsible for this document is
ISO/TC 172, Optics and photonics, Subcommittee SC 1, Fundamental standards.
This secondthird edition cancels and replaces the firstsecond edition (ISO 9022-7:19942005), which has
been technically rev ised, and of which it const it utes a minor rev isionISO 9022-7:1994/Cor.1:2001.Clause A . 3
has been added to provide detail information about the rain gauge.
ISO 9022 consists of the following parts, under the general title Optics and photonics — Environmental
test methods:
— Part 1: Definitions, extent of testing
— Part 2: Cold, heat and humidity
— Part 3: Mechanical stress
— Part 4: Salt mist
— Part 5: Combined cold, low air pressure6: Dust
— Part 6: Dust
— Part 7: Resistance to drip or rain
— Part 8: High internal pressure, low internal pressure, immersion
— Part 9: Solar radiation and weathering
— Part 10: Combined sinusoidal vibration and dry heat or cold
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ISO 9022-7:redline:2015(E)

— Part 11: Mould growth
— Part 12: Contamination
— Part 13: Combined shock, bump or free fall and dry heat or cold
— Part 14: Dew, hoarfrost, ice
— Part 15: Combined digitally controlled broad-band random vibration and dry heat or cold
— Part 16: Combined bounce or steady-state acceleration and dry heat or cold
— Part 17: Combined contamination, solar radiation
— Part 18: Combined damp heat and low internal pressure
— Part 19: Temperature cycles combined with sinusoidal or random vibration
— Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide
— Part 21: Combined low pressure and ambient temperature or dry heat22: Combined cold, dry heat
or temperature change with bump or random vibration
— Part 23: Low pressure combined with cold, ambient temperature and dry and damp heat
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ISO 9022-7:redline:2015(E)

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 the Arcticarctic 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, ISO 9022 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.
It should be noted that, asAs 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, it is necessary to assess the principal
function of the instrument tois to be assessed to determine which International Standard is toshould be
used for testing. If the optical function is of primary importance, then ISO 9022 is applicable, but if other
functions take precedence, then the appropriate International Standard in the field concerned should
be applied. Cases maycan arise where application of both ISO 9022 and other appropriate International
Standards will be necessary.
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INTERNATIONAL STANDARD ISO 9022-7:redline:2015(E)
Optics and photonics — Environmental test methods —
Part 7:
Resistance to drip or rain
1 Scope
This part of ISO 9022 specifies methods for the testingthe methods relating to the environmental tests
of optical instruments and instruments containing optical componentsincluding additional assemblies
from other fields (e.g. mechanical, chemical, and electronic devices), under equivalent conditions, for
their ability to resist the influence of drip or rain.
The purpose of testing is to investigate to what extent the optical, thermalclimatic, mechanical, chemical,
and electrical (including electrostatic) performance characteristics of the specimen are affected by drip
or rain. Contamination of drip or rain water due to impurities in the air shallis to be ignored for the
purposes of this part of ISO 9022.
2 Normative references
The following referenced documentsdocuments, in whole or in part, are normatively referenced in this
document and are indispensable for the application of this documentits application. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
ISO 9022-1:1994 , Optics and optical instruments photonics — Environmental test methods — Part 1:
Definitions, extent of testing
3 General information and test conditions
At the beginning of exposure, the temperature of the water shall be below that of the specimen. During
exposure, the specimen shall be mounted in the possible operating positions on a rotary table which
rotates at a speed of 1 r/min to 2 r/min about its axis perpendicular to the sprinkling area. Prior to
testing, the required rain or drip rate shall be measured and set in the centre of the sprinkling area
occupied by the specimen.
Measurement of the rain rate or drip rate shall be performed using a rain gauge of the type designed by
Prof. Hellmann. Seethe Hellman rain gauge (see A.3 for detailed information). If various measuring areas
exist and/or several measurementmeasurements are performed, the mean value for all measurements
shall lie within the limits specified in TablesTable 1 to, Table 2, and Table 3 for the required rain rates.
4 Conditioning
4.1 Conditioning Method 72 — method 72: Drip
The drip shall be produced with the test apparatus shown in Figure 1. This size of the test apparatus and
the dispenser plate (see Figure 2) shall be determined by the size of the specimens. Specimens requiring
2
a dispenser plate of more than 1 m may be tested in sections. The required water level above the
dispenser plate shall be regulated by a float valve and/or overflows (see Figure 1). Decalcified or fully
desalted water shall be used to prevent blockage of the fine holes in the dispenser plate. The distance
between the specimen and the dispenser plate shall not be less than 1 m. Care shall be taken to ensure
that every point of the possible upper sides of the specimen are exposed to the drip during the test.
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ISO 9022-7:redline:2015(E)

4.2 Conditioning Method 73 — method 73: Steady rain
The test shall be performed with tap water (drinking water) or with water prepared in accordance with
4.1. The shower heads used shall correspond to those shown in Figure 3. The swivelling shower heads
shall be arranged in such a way that the required rainfall rate is evenly distributed over the sprinkling
area. The measurement of the rain rate shall be performed in accordance with Clause 3. The number of
shower heads depends upon the size of the specimen. The shower heads shall be positioned at least 2 m
above the highest surface of the specimen. A recommended arrangement of the shower heads is given in
theAnnex A explanatory notes.
4.3 Conditioning Method 74 — method 74: Driving rain
The requirements of 4.2 shall apply for producing the rainfall. The wind generator shall be arranged so
that the rain falls as evenly as possible on the specimen.
Duri
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