SIST EN 60068-2-60:2016

Environmental testing - Part 2-60: Tests - Test Ke: Flowing mixed gas corrosion test

This part of IEC 60068-2 determines the corrosive influence of operating and storage indoor
environments on electrotechnical products components, equipment and materials, particularly
contacts and connections, considered separately, integrated into a subassembly or
assembled as a complete equipment.
It provides test methods giving information, on a comparative basis, to aid the selection of
materials, choice of production processes and component design, with regard to corrosion
resistance. A guide to the selection of methods and test duration is provided in Annex C.

Umgebungseinflüsse - Teil 2-60: Prüfungen - Prüfung Ke: Korrosionsprüfung mit strömendem Mischgas

Essais d'environnement - Partie 2-60: Essais - Essai Ke: Essai de corrosion dans un flux de mélange de gaz

L'IEC 60068-2-60:2015 est disponible sous forme de IEC 60068-2-60:2015 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 60068-2-60:2015 établit l'influence corrosive de l'environnement sur     des composants  de produits électrotechniques,  des équipements et des matériels, en fonctionnement ou stockés à l'intérieur de bâtiments, en particulier      sur des contacts et des connexions, pris  individuellement, intégrés dans un sous-ensemble ou  faisant partie  d'un équipement complet. Cette troisième édition  annule et remplace  la deuxième édition publiée en 1995. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques  majeures  suivantes  par rapport à l'édition précédente:
- mise à jour du format de l'IEC;
- mise à jour de la liste de références normatives;
- ajout d'informations concernant le volume de travail;
- révision de la procédure d'essai;
- révision des figures dans l'Annexe B.

Okoljsko preskušanje - 2-60. del: Preskusi - Preskus Ke: Preskus korozije z zmesjo tekočih plinov

Ta del standarda IEC 60068-2 določa vpliv korozije v zaprtih prostorih, namenjenih izvajanju del in shranjevanju, na sestavne dele elektrotehniških izdelkov, opreme in materiala, zlasti na stike in priključke, ki se obravnavajo ločeno, integrirane v podsklop ali sestavljene v popolno opremo.
Zagotavlja preskusne metode, ki podajajo primerjalne informacije za pomoč pri izbiri materialov, proizvodnih postopkov in načrtovanja sestavnih delov glede na odpornost na korozijo. Vodnik izbirnih metod in trajanja preskusov je na voljo v dodatku C.

General Information

• Status: Published
• Publication Date: 08-Feb-2016
• ICS: 19.040 - Environmental testing
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Jan-2016
• Due Date: 24-Mar-2016
• Completion Date: 09-Feb-2016
• Ref Project: EN 60068-2-60:2015 - Environmental testing - Part 2-60: Tests - Test Ke: Flowing mixed gas corrosion test

Relations

• Replaces: SIST EN 60068-2-60:2001 - Environmental testing -- Part 2: Tests - Test Ke: Flowing mixed gas corrosion test
• Effective Date: 24-Dec-2013
• Replaces: SIST EN 60068-2-60:2001 - Environmental testing -- Part 2: Tests - Test Ke: Flowing mixed gas corrosion test
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60068-2-60:2016
01-marec-2016
1DGRPHãþD
SIST EN 60068-2-60:2001
2NROMVNRSUHVNXãDQMHGHO3UHVNXVL3UHVNXV.H3UHVNXVNRUR]LMH]]PHVMR
WHNRþLKSOLQRY
Environmental testing - Part 2-60: Tests - Test Ke: Flowing mixed gas corrosion test
Ta slovenski standard je istoveten z: EN 60068-2-60:2015
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
SIST EN 60068-2-60:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60068-2-60:2016

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SIST EN 60068-2-60:2016


EUROPEAN STANDARD EN 60068-2-60

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2015
ICS 19.040 Supersedes EN 60068-2-60:1996
English Version
Environmental testing - Part 2-60: Tests - Test Ke: Flowing
mixed gas corrosion test
(IEC 60068-2-60:2015)
Essais d'environnement - Partie 2-60: Essais - Essai Ke: Umweltprüfungen - Teil 2-60: Prüfungen - Prüfung Ke:
Essai de corrosion dans un flux de mélange de gaz Korrosionsprüfung mit strömendem Mischgas
(IEC 60068-2-60:2015) (IEC 60068-2-60:2015)
This European Standard was approved by CENELEC on 2015-07-23. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60068-2-60:2015 E

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SIST EN 60068-2-60:2016
EN 60068-2-60:2015 (E)
European foreword
The text of document 104/655/FDIS, future edition 3 of IEC 60068-2-60, prepared by IEC/TC 104
"Environmental conditions, classification and methods of test" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 60068-2-60:2015.

The following dates are fixed:
(dop) 2016-06-11
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2018-07-23
• latest date by which the national
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.

Endorsement notice
The text of the International Standard IEC 60068-2-60:2015 was approved by CENELEC as a
European Standard without any modification.
2

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SIST EN 60068-2-60:2016
EN 60068-2-60:2015 (E)
Annex ZA
(normative)


Normative references to international publications
with their corresponding European publications


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.


NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.


Publication Year Title EN/HD Year
IEC 60512-2-1 -  Connectors for electronic equipment - EN 60512-2-1 -
Tests and measurements -- Part 2-1:
Electrical continuity and contact resistance
tests - Test 2a: Contact resistance -
Millivolt level method
IEC 60512-3-1 -  Connectors for electronic equipment - EN 60512-3-1 -
Tests and measurements -- Part 3-1:
Insulation tests - Test 3a: Insulation
resistance
ISO 431 -  Copper refinery shapes - -

3

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SIST EN 60068-2-60:2016

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SIST EN 60068-2-60:2016



IEC 60068-2-60

®


Edition 3.0 2015-06




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Environmental testing –

Part 2-60: Tests – Test Ke: Flowing mixed gas corrosion test




Essais d'environnement –

Partie 2-60: Essais – Essai Ke: Essai de corrosion dans un flux de mélange de

gaz
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 19.040 ISBN 978-2-8322-2747-3



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60068-2-60:2016
– 2 – IEC 60068-2-60:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Test apparatus . 5
4 Severities . 6
5 Preconditioning . 6
6 Initial measurements . 6
7 Testing . 7
7.1 General . 7
7.2 Test specimens . 7
7.3 Corrosivity monitoring materials . 7
7.4 Testing procedure . 7
8 Recovery . 9
9 Final measurements . 9
10 Information to be given in the relevant specification . 9
11 Information to be given in the test report . 10
Annex A (normative) Corrosion monitoring copper coupons . 11
A.1 General . 11
A.2 Nature and dimension . 11
A.3 Cleaning procedure . 11
Annex B (informative) Description of test apparatus . 12
B.1 General . 12
B.2 Climatic system . 12
B.3 Test enclosure . 13
B.4 Gas delivery system . 14
B.5 Analysing system . 14
B.5.1 Temperature and humidity . 14
B.5.2 Gases . 14
B.6 Other corrosion monitoring methods . 15
B.6.1 Mass increase . 15
B.6.2 Surface analysis of monitoring coupons . 15
B.6.3 Visual examination . 16
B.7 Calibration of the chamber . 16
Annex C (informative) Guide to the selection of methods and test duration . 17
C.1 Introductory remarks . 17
C.2 Function of corrosive gases used in the tests . 17
C.3 Use of the different test methods . 17
Bibliography . 19

Figure B.1 – Example of test apparatus . 12

Table 1 – Test conditions . 6

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SIST EN 60068-2-60:2016
IEC 60068-2-60:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ENVIRONMENTAL TESTING –

Part 2-60: Tests – Test Ke: Flowing mixed gas corrosion test

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60068-2-60 has been prepared by IEC technical committee 104:
Environmental conditions, classification and methods of test.
This third edition cancels and replaces the second edition, published in 1995, and constitutes
a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– updated IEC format;
– updated normative references list;
– addition of information of the working volume;
– revision of the test procedure;
– revision of the figures in Annex B.

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SIST EN 60068-2-60:2016
– 4 – IEC 60068-2-60:2015 © IEC 2015
The text of this standard is based on the following documents:
FDIS Report on voting
104/655/FDIS 104/656/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60068 series, published under the general title Environmental
testing, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST EN 60068-2-60:2016
IEC 60068-2-60:2015 © IEC 2015 – 5 –
ENVIRONMENTAL TESTING –

Part 2-60: Tests – Test Ke: Flowing mixed gas corrosion test



1 Scope
This part of IEC 60068-2 determines the corrosive influence of operating and storage indoor
environments on electrotechnical products components, equipment and materials, particularly
contacts and connections, considered separately, integrated into a subassembly or
assembled as a complete equipment.
It provides test methods giving information, on a comparative basis, to aid the selection of
materials, choice of production processes and component design, with regard to corrosion
resistance. A guide to the selection of methods and test duration is provided in Annex C.
2 Normative references
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.
IEC 60512-2-1, Connectors for electronic equipment – Tests and measurements – Part 2-1:
Electrical continuity and contact resistance tests – Test 2a: Contact resistance – Millivolt level
resistance method
IEC 60512-3-1, Connectors for electronic equipment – Tests and measurements – Part 3-1:
Insulation tests – Test 3a: Insulation resistance
ISO 431, Copper refinery shapes
3 Test apparatus
The test apparatus consists of a climatic system, test enclosure, gas delivery system and
means for measuring gas concentration.
Details of design and construction are optional but shall be such that the conditions specified
for each method are fulfilled throughout the working volume and shall comply with the
following requirements:
– water droplets or aerosols shall not be injected into the test enclosure;
– air and water used shall be sufficiently clean in order not to affect performance of the test;
– the test atmosphere shall flow through the enclosure in such a manner as to ensure
uniform test conditions within the working volume;
– the sampling point for gas analysis shall be in the working volume of the test enclosure;
– the exhaust gases shall be treated in accordance with the relevant regulatory stipulations;
– the wet bulb pod shall be placed in the test chamber in such a manner not to exceed
0,1 % of the cross-section of the test chamber.

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SIST EN 60068-2-60:2016
– 6 – IEC 60068-2-60:2015 © IEC 2015
Because of the strong synergistic effect and the so called “memory effect” (i.e., it is difficult to
fully remove the chlorine compounds from the chamber, tubes, etc.), it is recommended that
enclosures and tubing used for tests that incorporate chlorine only be used for chlorine tests.
The working volume is the volume within which the individual corrosion (mass increase of
2
copper coupons expressed in mg/( dm × day) according to Annex A) at each location differs
by a maximum of 15 % from the average corrosion of all coupons within the working volume.
4 Severities
The test severity shall be given in the relevant specification. It is defined by
– the test method, chosen from Table 1,
– the test duration.
Preferred durations, in days, are 4, 7, 10, 14 and 21.
Four methods are defined. The different parameters for each method are summarized in the
following Table 1. A guidance for the use of each method is given in Clause C.3.
Table 1 – Test conditions
Parameters Method 1 Method 2 Method 3 Method 4
−9
H S (10 vol/vol) 100 ± 20 10 ± 5 100 ± 20 10 ± 5
2
−9
NO (10 vol/vol)
200 ± 50 200 ± 50 200 ± 20
2

−9
Cl (10 vol/vol)
10 ± 5 20 ± 5 10 ± 5
2
−9
SO (10 vol/vol)
500 ± 100 200 ± 20
2
a
Temperature (°C) 25 ± 1 30 ± 1 30 ± 1 25 ± 1
a
RH (%) 75 ± 3 70 ± 3 75 ± 3 75 ± 3
Rate of ventilations 3 to 10 3 to 10 3 to 10 3 to 10
per hour
Mass increase of 1,0 to 2,0 0,3 to 1,3 1,2 to 2,2 1,2 to 2,4
copper coupons
2
mg/(dm × day)
according to Annex A
NOTE Since the nature of the corrosive attack is different for test Methods 1 to 4, neither their numbering nor
the corresponding mass increase of copper coupons reflect their severity.
a
Different temperature and humidity values (e.g. 40 °C and 80 %RH) may be used based upon mutual
agreement between the interested parties. The mass increase may be different from the given values.

5 Preconditioning
The relevant specification may require preconditioning of specimens, for example cleaning or
mechanical operation.
6 Initial measurements
Initial measurements shall be carried out as required by the relevant specification.
Generally, these measurements are:

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SIST EN 60068-2-60:2016
IEC 60068-2-60:2015 © IEC 2015 – 7 –
– contact resistance measurements for electromechanical product components (see
IEC 60512-2-1);
– insulation resistance measurements (see IEC 60512-3-1).
7 Testing
7.1 General
Samples exposed in the tests shall be
– the specimens being evaluated,
– corrosion monitor materials.
7.2 Test specimens
The relevant product specification shall define the conditions of the specimens during the test,
for example mated or unmated for connectors; contacts open or closed for switches, operated
or electrically loaded.
The duration of the operation or loading of heat-dissipating specimens, shall be such that the
temperature and the relative humidity in the working volume remain within the specified
tolerances.
The conditions of the specimens and the test chamber shall be such that condensation on the
specimens shall not occur when they are introduced into the test chamber.
The total volume of the test specimens should not exceed 10 % of the volume of the working
area of the test chamber. If the total volume of the test specimens exceed 10 %, the amount
exceeding 10 % shall be included in the test report.
The total surface area of the test specimens should not exceed 10 % of the surface area of
the working area of the test chamber. If the total surface of the test specimens exceed 10 %,
the amount exceeding 10 % shall be included in the test report.
A minimum space between specimens might be 10 mm so as not to disturb the uniform air
flow.
7.3 Corrosivity monitoring materials
Copper coupons shall be exposed with the test specimens in order to verify the conformance
of the test condition.
A minimum of five test coupons of copper, prepared in accordance with Annex A, shall be
exposed with the test specimens for the same duration. Their mass increase during the test,
measured by a balance with a resolution of 0,01 mg, shall be taken as a measure of the
corrosion and as a monitor of the reproducibility and repeatability of the test.
Other vehicles, for example, gold-plated coupons or other specimens (see B.6.3) can be used
in addition to the copper coupons.
7.4 Testing procedure
One of the following test procedures shall be used:

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SIST EN 60068-2-60:2016
– 8 – IEC 60068-2-60:2015 © IEC 2015
Test procedure 1
When the test atmosphere does not contain chlorine (Method 1) or when the method for
measuring chlorine concentration does not suffer interference from the other gases present in
the test atmosphere, the following procedure shall be used:
– after the specified temperature is stabilized, start the flow of humid air, allow to stabilize
and adjust temperature and humidity not to accumulate the condensation on the inner wall
of the test chamber and the test specimen;
– start the flow of the gases into the humid air stream and allow to stabilize;
– measure and adjust gas concentrations. Allow to stabilize. When it is necessary to
measure chlorine concentration, total chlorine (not only chlorine gas, Cl ) present in the
2
test atmosphere is taken as a measure of chlorine gas concentration. The chlorine added
to the test atmosphere shall still only be in the form of chlorine gas, Cl ;
2
– introduce the test specimens and the corrosion monitoring materials as prescribed in 7.3.
The copper coupons shall be exposed with the test specimens for the first 4 days during a
test duration. The copper coupons might be exposed another 4 days during a test
duration, if necessary. It shall be included in the test report. The test specimens and the
corrosion monitoring materials shall be distributed uniformly in the working volume. They
shall not come in contact with one another nor shield one another from the test
atmosphere. The test specimens shall be in the condition (for example, mated/unmated,
electrically loaded or operated) as stated in the relevant specification. The test duration
shall be measured from this point;
– allow the test conditions to stabilize, which may require considerable time. Measure and
adjust, if necessary, temperature, humidity and gas concentrations. During these
adjustments, any overshooting of gas concentration shall be avoided. Maximum allowed
duration of this period of stabilization and adjustments, to prescribed values, is 24 h;
– during the course of testing, temperature, humidity and gas concentrations shall be kept
within the prescribed limits. The chamber is allowed to be opened during the test.
The number of openings shall be limited.
No opening is allowed for a test duration shorter than 4 days.
One opening is allowed for a test duration of between 4 and 10 days.
One opening per week is allowed for a test duration exceeding 10 days.
The duration of these openings shall be limited to the time necessary to remove and
introduce specimens and/or copper coupons;
– at the end of the test period, remove the specimens and the corrosion monitoring
materials.
Test procedure 2
When chlorine is present in the test atmosphere (Methods 2 to 4) and when the method for
measuring chlorine suffers interference from other gases in the test atmosphere, the following
procedure shall be used:
– after the specified temperature is stabilized, start the flow of humid air, allow to stabilize
and adjust temperature and humidity so as not to accumulate the condensation on the
inner wall of the test chamber and the test specimen;
– start the flow of chlorine into the humid air stream and allow to stabilize;
– measure and adjust the chlorine concentration. Allow to stabilize;
– introduce the test specimens and the corrosion monitor materials as prescribed in 7.2. The
copper coupons shall be exposed with the test specimens for the first 4 days during a test
duration. The copper coupons might be exposed another 4 days during a test duration, if
necessary. It shall be included in the test report. The test specimens and the corrosion
monitoring materials shall be distributed uniformly in the working volume. They shall not
come in contact with one another nor shield one another from the test atmosphere. The

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SIST EN 60068-2-60:2016
IEC 60068-2-60:2015 © IEC 2015 – 9 –
test specimens shall be in the condition (for example, mated/unmated, electrically loaded
or operated) as stated in the relevant specification;
– allow temperature, humidity and chlorine concentration to stabilize, which may require
considerable time due to initially high reaction or adsorption rates of chlorine with surfaces.
If necessary, measure and adjust the chlorine concentration. During this adjustment, any
overshooting of gas concentration shall be avoided. The chlorine concentration shall
remain stable for 2 h minimum. The maximum allowed duration of this period of chlorine
stabilization and adjustments, to prescribed values, is 24 h;
– start the flow of the remaining gases and allow to stabilize. Measure and adjust, if
necessary, temperature, humidity and gas concentrations, excluding chlorine. During
these adjustments, any overshooting of gas concentration shall be avoided. The maximum
allowed duration of this period of stabilization and adjustments, to prescribed values, is
24 h. The test duration is measured from the moment when all gases are present in the
test atmosphere;
– during the course of testing, temperature, humidity and gas concentrations shall be kept
within the prescribed limits. Chlorine concentration, however, cannot be controlled during
the test. The way to ensure that values remain within the set limits is to carry out the
chlorine measurement after finishing the test (see below). The chamber is allowed to be
opened during the test.
The number of openings shall be limited.
No opening is allowed for a test duration shorter than 4 days.
One opening is allowed for a test duration of between 4 and 10 days.
One opening per week is allowed for a test duration exceeding 10 days.
The duration of these openings shall be limited to the time necessary to remove and
introduce specimens and/or copper coupons;
– at the end of the test period, stop the flow of gases except chlorine which shall remain
running. Allow sufficient time to empty the chamber of the other gases, to an extent
sufficient to avoid interference with chlorine analyses;
– measure the chlorine concentration which shall be within the limits prescribed in order for
the test to be valid;
– remove the test specimens and the corrosion monitoring materials.
8 Recovery
After removal of the specimens from the test chamber, they shall be stored in accordance with
the relevant specification prior to final measurements.
9 Final measurements
The final measurements shall be carried out as required by the relevant specification which
ma
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