IEC 61300-2-47:2010
(Main)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-47: Tests - Thermal shocks
Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-47: Tests - Thermal shocks
IEC 61300-2-47:2010 details a procedure for determining the suitability of a fibre optic device to withstand the effects of thermal shock. In practice this means a very short change over time between extreme temperatures. The significant changes include the review of the test severity. The contents of the corrigendum of April 2011 have been included in this copy.
Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes fondamentales d'essais et de mesures - Partie 2-47: Essais - Chocs thermiques
La CEI 61300-2-47:2010 détaille une méthode pour déterminer l'aptitude d'un dispositif à fibres optiques à résister aux effets des chocs thermiques. En pratique, cela correspond à un temps de passage très court entre des températures extrêmes. Parmi les modifications significatives, la sévérité d'essai a été revue. Le contenu du corrigendum d'avril 2011 a été pris en considération dans cet exemplaire.
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Standards Content (Sample)
IEC 61300-2-47
®
Edition 3.0 2010-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components –
Basic test and measurement procedures –
Part 2-47: Tests – Thermal shocks
Dispositifs d'interconnexion et composants passifs à fibres optiques –
Méthodes fondamentales d'essais et de mesures –
Partie 2-47: Essais – Chocs thermiques
IEC 61300-2-47:2010
---------------------- Page: 1 ----------------------
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IEC 61300-2-47
®
Edition 3.0 2010-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components –
Basic test and measurement procedures –
Part 2-47: Tests – Thermal shocks
Dispositifs d'interconnexion et composants passifs à fibres optiques –
Méthodes fondamentales d'essais et de mesures –
Partie 2-47: Essais – Chocs thermiques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
K
CODE PRIX
ICS 33.180.20 ISBN 978-2-88912-213-4
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 General description .5
4 Apparatus.5
4.1 Testing chambers.5
4.2 Support for mounting the test specimens.6
5 Procedure .6
5.1 General .6
5.2 Preconditioning .6
5.3 Initial measurements .6
5.4 Testing .6
5.5 Recovery.7
5.6 Final measurements .7
6 Severity.7
7 Details to be specified .8
Annex A (informative) Minimum temperature value in Finland .9
Bibliography.10
Figure 1 – Temperature change cycle .7
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61300-2-47 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-47: Tests – Thermal shocks
FOREWORD
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International Standard IEC 61300-2-47 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This third edition cancels and replaces the second edition published in 2006. It constitutes a
technical revision. The significant changes include the review of the test severity.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3069/FDIS 86B/3101/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.
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This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The reader’s attention is drawn to the fact that Annex A lists an “in some-country” clause on
differing practices of a less permanent nature relating to the subject of this standard.
A list of all parts of the IEC 61300 series, published 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.
The contents of the corrigendum of April 2011 have been included in this copy.
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61300-2-47 © IEC:2010 – 5 –
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-47: Tests – Thermal shocks
1 Scope
This part of IEC 61300 details a procedure for determining the suitability of a fibre optic
device to withstand the effects of thermal shock. In practice this means a very short change
over time between extreme temperatures.
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 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-1: Examinations and measurements – Visual examination
3 General description
This procedure is conducted in accordance with IEC 60068-2-14, test Na. The device under
test (DUT) is first subjected to one extreme of temperature for a given period of time. It is then
subjected to the other extreme of temperature for an equal period of time.
Two test methods are considered: manual or automatic. Both methods are considered as
equivalent. The reference method is the automatic one.
4 Apparatus
4.1 Testing chambers
a) Two separate chambers or one rapid temperature change rate may be used. If two
chambers are used, one for the low temperature and one for the high temperature, they
are located such as to allow transfer of the DUT from one chamber to the other within the
prescribed time. Either manual and automatic transfer methods may be used.
b) The chambers shall be capable of maintaining the atmosphere at the appropriate
temperature for the test in any region where the DUT is placed.
3
c) The absolute humidity of the atmosphere inside the chambers should not exceed 20 g/m .
NOTE At the temperature of 60 °C and standard air pressure the relative humidity should be less than 16 %.
d) The temperature of the walls of the hot and cold chambers shall not differ by more than
3 % and 8 % respectively from the specified ambient temperature of the test, expressed in
Kelvin.
e) The volume of the chambers and the air velocity shall be such that after insertion of the
DUT, the temperature of the atmosphere shall be within the specified tolerance after a
time of not more than 10 % of the exposure time.
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– 6 – 61300-2-47 © IEC:2010
f) The air of the chamber shall be circulated so that the air velocity, measured close to the
test specimen, shall be not less than 2 m/s.
4.2 Support for mounting the test specimens
Unless otherwise specified in the relevant specifications, the thermal conductivity of the
supports for mounting the specimens shall be low, such that for practical purposes the
specimen is thermally isolated. When testing several specimens simultaneously, they shall be
so placed that free circulation should be provided between specimens, and between
specimens and chamber surfaces.
5 Procedure
5.1 General
Conduct the test according to the following procedure.
Unless otherwise stated in the relevant specification, the following applies.
– If the component construction includes optical leads, include 1,5 m of cable in the climatic
chamber for each port monitored during the test.
– If optical measurements are requested during the test by the relevant specification, these
measurements shall be performed at a maximum interval of 10 min during the extreme
temperature periods.
– It is not the intention of the test to record the effects of mechanical movement of the
optical cables during the movement of the DUT from one environmental chamber to the
other. Therefore the physical arrangement of the cables shall ensure that movement of the
DUT does not affect the optical transmission. To verify this, optical cables similar to those
attached to the DUT shall be positioned alongside the cables attached to the DUT and
monitored throughout the test as a control.
5.2 Preconditioning
Unless otherwise stated in the relevant specification, maintain the DUT under standard
atmospheric conditions for a minimum of 2 h. Clean the mechanical and optical alignment
parts of the DUT according to the manufacturer's instructions.
5.3 Initial measurements
Complete initial examinations and measurements as required by the relevant specification.
5.4 Testing
a) Place the DUT in the chamber in its normal operating position and make connections to
the monitoring equipment.
b) The device shall be subjected to a temperature cycle according to Figure 1.
c) The DUT shall be placed in the cold chamber, the atmosphere of which has been
previously adjusted to the appropriate low temperature T . The atmosphere in the cold
A
chamber shall be maintained at the low temperature T for the appropriate period t (t
A 1 1
includes an initial time for temperature stabilization of atmosphere, according to 4.1e).
d) The DUT shall then be removed from the cold chamber and transferred to the hot chamber
in a changeover time t not more than 3 min. In the case of automatic two-chamber test
2
equipment, a changeover period shall be of less than 30 s. The transition time shall
include the time of removal from one chamber and the insertion into the second chamber
as well as any dwell time at the ambient temperature of the laboratory.
e) The atmosphere in the hot chamber shall be maintained at the high temperature T for the
B
appropriate period t
1.
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61300-2-47 © IEC:2010 – 7 –
f) For the next cycle the DUT shall be transferred to the cold chamber in a transition time t
2.
NOTE The exposure time is measured from the moment of insertion of the specimen into the chamber.
The first cycle includes the two exposure times t and the two changeover times t (see
1 2
Figure 1).
≤ 0,1t
1
T
B
A B
Time t
t
t t t 2
2
1 1
T
A
≤ 0,1t
1
1 cycle
IEC 2292/10
Key
A = start of first cycle
B = end of first cycle and start of second cycle
NOTE The dotted curve is explained in 4.1e).
Figure 1 – Temperature change cycle
5.5 Recovery
Dry the DUT if necessary and allow it to remain under standard atmospheric conditions for a
period of 2 h.
5.6 Final measurements
On completion of the test, remove all fixtures. Clean the mechanical and optical alignment
parts of the DUT according to the manufacturer’s instructions. Take final measurements as
required by the relevant specification. If specified, visually examine
...
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