IEC 61300-2-21:2009
(Main)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-21: Tests - Composite temperature/humidity cyclic test
Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-21: Tests - Composite temperature/humidity cyclic test
IEC 61300-2-21:2009 determines the resistance of a fibre optic device to the deteriorative effects of high temperature, humidity and cold conditions. It is intended to reveal defects in a device under test (DUT) caused by breathing as opposed to absorption of moisture. The test covers the effect of the freezing of trapped water in cracks and fissures as well as condensation. However, the degree of condensation will vary depending on the size and thermal mass of the DUT. The changes with respect to the previous edition are:
- to reconsider the whole parts of the standard;
- to describe the apparatus and procedure in greater details;
- to define with precision the number of 24 cycles in the severity.
Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes fondamentales d'essais et de mesures - Partie 2-21: Essais - Essai cyclique composite de température et d'humidité
La CEI 61300-2-21:2009 détermine la résistance des dispositifs à fibres optiques aux effets de détérioration dus aux conditions de température élevée, d'humidité et de froid. Elle est destinée à révéler les défauts d'un dispositif en essai provoqués par sa respiration, par opposition à la notion d'absorption d'humidité. Cet essai couvre l'effet de la congélation de l'eau piégée dans des craquelures et des fissures aussi bien que celui de la condensation. Cependant, le niveau de condensation varie selon les dimensions et la masse thermique du dispositif en essai. Les changements par rapport à l'édition précédente sont les suivants:
- la reconsidération de toutes les parties de la norme;
- la description de l'appareillage et des procédures avec plus de détails;
- la définition avec précision du nombre de 24 cycles dans la sévérité.
General Information
Standards Content (Sample)
IEC 61300-2-21 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-21: Tests – Composite temperature/humidity cyclic test
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 61300-2-21 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-21: Tests – Composite temperature/humidity cyclic test
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
M
ICS 33.180.20 ISBN 978-2-88910-491-8
– 2 – 61300-2-21 © IEC:2009(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-21: Tests –
Composite temperature/humidity cyclic 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 61300-2-21 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 1995. It constitutes a
technical revision. The changes with respect to the previous edition are:
– to reconsider the whole parts of the standard;
– to describe the apparatus and procedure in greater details;
– to define with precision the number of 24 cycles in the severity.
61300-2-21 © IEC:2009(E) − 3 −
The text of this standard is based on the following documents:
FDIS Report on voting
86B/2924/FDIS 86B/2961/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 the parts of IEC 61300 series, under the general title, Fibre optic interconnecting
devices and passive components – Basic test and measurement procedures, can be found on
the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result 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.
A bilingual version of this publication may be issued at a later date.
– 4 – 61300-2-21 © IEC:2009(E)
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-21: Tests –
Composite temperature/humidity cyclic test
1 Scope
The purpose of this part of IEC 61300 is to determine the resistance of a fibre optic device to
the deteriorative effects of high temperature, humidity and cold conditions.
It is intended to reveal defects in a device under test (DUT) caused by breathing as opposed to
absorption of moisture. The test covers the effect of the freezing of trapped water in cracks and
fissures as well as condensation. However, the degree of condensation will vary depending on
the size and thermal mass of the DUT.
This test differs from other cyclic damp heat tests in that it derives its increased severity from:
a) a greater number of temperature variations leading to pumping actions in a given time;
b) a greater cyclic temperature range;
c) a higher rate of change of temperature;
d) the inclusion of a number of excursions to sub-zero temperature.
This type of test is particularly important for fibre optic devices made of a variety of different
materials.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60068-2-38 Environmental testing – Part 2-38: Tests – Test Z/AD: Composite
temperature/humidity cyclic test
IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-1: Examinations and measurements – Visual examination
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examinations and measurements – Attenuation
3 General description
This procedure is conducted in accordance with IEC 60068-2-38, test Z/AD. The DUT is placed
in a humidity chamber and subjected to 10 temperature-humidity cycles, each of 24 h duration.
During any five of the first nine cycles after exposure to the humidity subcycle, the DUT shall
be subjected to cold.
61300-2-21 © IEC:2009(E) − 5 −
4 Apparatus
4.1 General
The exposure to moisture, followed by cold, can either be performed in one chamber or in two
separate chambers.
4.2 Chamber for the exposure to moisture
The chamber for the exposure to moisture shall be so constructed that:
a) The temperature can be varied between 25 °C ± 2 °C and 65 °C ± 2 °C in a period of
between 1 h 30 and 2 h 30 for both rising and falling temperatures.
b) The relative humidity can be maintained at 93 % RH ± 3 % RH during the periods of
constant or rising temperature and between 88 % RH ± 8 % RH during the falling
temperature periods.
c) Care shall be taken to ensure that the conditions prevailing at any point in the working
space are uniform and are as similar as possible to those prevailing in the immediate
vicinity of suitably located temperature and humidity sensing devices.
The air in the chamber shall be continuously stirred at a rate necessary to maintain the
specified conditions of temperature and humidity.
d) The DUT shall not be subjected to radiant heat from the chamber conditioning processes.
e) Condensed water is continuously drained from the chamber and not used again until it has
been repurified.
f) Precautions shall be taken to ensure that no condensed water from the walls and roof of
the test chamber can fall on the DUT.
4.3 Chamber for exposure to cold
The chamber for exposure to cold shall be so constructed that:
a) The temperature can be maintained at –10 °C ± 2 °C.
b) Care shall be taken to ensure that the conditions prevailing at any point in the working
space are uniform and are as similar as possible to those prevailing in the immediate
vicinity of suitably located temperature-sensing devices.
The air in the chamber shall be continuously stirred.
c) Care shall be taken that the thermal capacity of the DUT does not appreciably influence
conditions within the chamber.
4.4 Humidity chamber
The humidity chamber may be used for exposure to cold in which case it shall meet the
requirements of 4.2 and in addition shall be so constructed that:
a) The temperature can be lowered from 25 °C ± 2 °C to –10 °C ± 2 °C in a period of not more
than 30 min.
b) The DUT can be held at a temperature of –10 °C ± 2 °C for a period of 3 h.
c) The temperature can be raised from –10 °C ± 2 °C to 25 °C ± 2 °C in a period of not more
than 90 min.
4.5 Optical source and detector
The optical source and detector used to measure changes in attenuation shall comply with
those specified in IEC 61300-3-4.
– 6 – 61300-2-21 © IEC:2009(E)
5 Procedure
5.1 Preparation of specimens
Prepare the specimen according to the manufacturer’s instructions or as specified in the
relevant specification. The specimen shall be terminated with a sufficient length of fibre cable
to facilitate connection with the optical source and the detector.
Clean the optical and mechanical parts of the DUT according to the manufacturer’s instructions.
5.2 Pre-conditioning (see Figure 1)
Unless otherwise specified, the DUT, switched off, ready for-use-state, shall be subjected to
55 °C ± 2 °C with a relative humidity not exceeding 20 % RH for a period of 24 h prior to the
conditioning.
The DUT shall then be allowed to attain thermal stability at standard atmospheric conditions for
testing or as otherwise specified before the initial measurements are made.
61300-2-21 © IEC:2009(E) − 7 −
Relative humidity
not more than 20 %
0 12 24 Time (h)
IEC 2405/09
No specific rate of
cooling is required
Pre-conditioning period
Initial
measurements
Stabilizing period
Drying period
0 12 24 Time (h)
IEC 2406/09
Figure 1 – Preconditioning
Temperature (°C) Relative humidity (%)
– 8 – 61300-2-21 © IEC:2009(E)
5.3 Initial measurements
The DUT shall be visually inspected and optically measured and mechanically checked as
required by the relevant specification.
5.4 Conditioning
5.4.1 General
The DUT shall be introduced into the humidity chamber, switched off, ready-for-use state, and
mounted in the normal orientation, if this is known, or as otherwise specified and shall be
subjected to 10 temperature/humidity cycles, each of 24 h duration.
During any five of the
...
IEC 61300-2-21 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures –
Part 2-21: Tests – Composite temperature/humidity cyclic test
Dispositifs d'interconnexion et composants passifs à fibres optiques –
Méthodes fondamentales d'essais et de mesures –
Partie 2-21: Essais – Essai cyclique composite de température et d’humidité
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.
IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
ƒ Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: csc@iec.ch
Tél.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 61300-2-21 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures –
Part 2-21: Tests – Composite temperature/humidity cyclic test
Dispositifs d'interconnexion et composants passifs à fibres optiques –
Méthodes fondamentales d'essais et de mesures –
Partie 2-21: Essais – Essai cyclique composite de température et d’humidité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 33.180.20 ISBN 978-2-88912-049-9
– 2 – 61300-2-21 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-21: Tests –
Composite temperature/humidity cyclic 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 61300-2-21 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This bilingual version (2010-07) replaces the English version.
This second edition cancels and replaces the first edition published in 1995. It constitutes a
technical revision. The changes with respect to the previous edition are:
– to reconsider the whole parts of the standard;
– to describe the apparatus and procedure in greater details;
– to define with precision the number of 24 cycles in the severity.
61300-2-21 © IEC:2009 − 3 −
The text of this standard is based on the following documents:
FDIS Report on voting
86B/2924/FDIS 86B/2961/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.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts of IEC 61300 series, under the general title, Fibre optic interconnecting
devices and passive components – Basic test and measurement procedures, 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.
– 4 – 61300-2-21 © IEC:2009
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-21: Tests –
Composite temperature/humidity cyclic test
1 Scope
The purpose of this part of IEC 61300 is to determine the resistance of a fibre optic device to
the deteriorative effects of high temperature, humidity and cold conditions.
It is intended to reveal defects in a device under test (DUT) caused by breathing as opposed to
absorption of moisture. The test covers the effect of the freezing of trapped water in cracks and
fissures as well as condensation. However, the degree of condensation will vary depending on
the size and thermal mass of the DUT.
This test differs from other cyclic damp heat tests in that it derives its increased severity from:
a) a greater number of temperature variations leading to pumping actions in a given time;
b) a greater cyclic temperature range;
c) a higher rate of change of temperature;
d) the inclusion of a number of excursions to sub-zero temperature.
This type of test is particularly important for fibre optic devices made of a variety of different
materials.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60068-2-38, Environmental testing – Part 2-38: Tests – Test Z/AD: Composite
temperature/humidity cyclic test
IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-1: Examinations and measurements – Visual examination
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examinations and measurements – Attenuation
3 General description
This procedure is conducted in accordance with IEC 60068-2-38, test Z/AD. The DUT is placed
in a humidity chamber and subjected to 10 temperature-humidity cycles, each of 24 h duration.
During any five of the first nine cycles after exposure to the humidity subcycle, the DUT shall
be subjected to cold.
61300-2-21 © IEC:2009 − 5 −
4 Apparatus
4.1 General
The exposure to moisture, followed by cold, can either be performed in one chamber or in two
separate chambers.
4.2 Chamber for the exposure to moisture
The chamber for the exposure to moisture shall be so constructed that:
a) The temperature can be varied between 25 °C ± 2 °C and 65 °C ± 2 °C in a period of
between 1 h 30 and 2 h 30 for both rising and falling temperatures.
b) The relative humidity can be maintained at 93 % RH ± 3 % RH during the periods of
constant or rising temperature and between 88 % RH ± 8 % RH during the falling
temperature periods.
c) Care shall be taken to ensure that the conditions prevailing at any point in the working
space are uniform and are as similar as possible to those prevailing in the immediate
vicinity of suitably located temperature and humidity sensing devices.
The air in the chamber shall be continuously stirred at a rate necessary to maintain the
specified conditions of temperature and humidity.
d) The DUT shall not be subjected to radiant heat from the chamber conditioning processes.
e) Condensed water is continuously drained from the chamber and not used again until it has
been repurified.
f) Precautions shall be taken to ensure that no condensed water from the walls and roof of
the test chamber can fall on the DUT.
4.3 Chamber for exposure to cold
The chamber for exposure to cold shall be so constructed that:
a) The temperature can be maintained at –10 °C ± 2 °C.
b) Care shall be taken to ensure that the conditions prevailing at any point in the working
space are uniform and are as similar as possible to tho
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.