IEC 61300-2-47:2016

IEC 61300-2-47 ®
Edition 4.0 2016-05
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 fibroniques – Procédures
fondamentales d'essais et de mesures –
Partie 2-47: Essais – Chocs thermiques
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IEC 61300-2-47 ®
Edition 4.0 2016-05
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 fibroniques – Procédures

fondamentales d'essais et de mesures –

Partie 2-47: Essais – Chocs thermiques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-3418-1

– 2 – IEC 61300-2-47:2016 © IEC 2016
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 DUT . 6
5 Procedure . 6
5.1 General . 6
5.2 Preconditioning . 6
5.3 Initial examination and measurement . 6
5.4 Testing . 6
5.5 Recovery . 7
5.6 Final examination and measurement . 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

INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 2-47: Tests – Thermal shocks

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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 61300-2-47 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This fourth edition cancels and replaces the third edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical change with respect to the previous
edition: review of temperature limit in the test severity.

– 4 – IEC 61300-2-47:2016 © IEC 2016
The text of this standard is based on the following documents:
CDV Report on voting
86B/3879/CDV 86B/3937A/RVC
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.
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 in 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.
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 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 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
The procedure described in this standard 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 or 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.
c) The absolute humidity of the atmosphere inside the chambers should not exceed 20 g/m .
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 (tolerance of 3 % for high temperature, and 8 % for low temperature).

– 6 – IEC 61300-2-47:2016 © IEC 2016
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.
f) The air of the chamber shall be circulated so that the air velocity, measured close to the
DUT, shall be not less than 2 m/s.
4.2 Support for mounting the DUT
Unless otherwise specified in the relevant specification, the thermal conductivity of the
supports for mounting the DUT shall be low, such that for practical purposes the DUT is
thermally isolated. When testing several DUTs simultaneously, they shall be so placed that
free circulation should be provided between DUTs, and between DUTs and chamber surfaces.
5 Procedure
5.1 General
Conduct the test according to the following procedure.
– 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 examination and measurement
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 (initial temperature T
s
b) The DUT 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 4.1 e)).
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
equipment, a changeover period shall be 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.
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 DUT into the chamber.
The first cycle includes the two exposure times t and the two changeover times t
1 2
(see Figure 1).
≤ 0,1t
T
B
A
B
T
s
Time (t)
t
t
t t 2
1 1
T
A
≤ 0,1t
1 cycle
IEC
Key
A start of first cycle
B end of first cycle and start of second cycle
NOTE The dotted curve is explained in 4.1 e).
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 examination and measurement
On completion of the test, remove all fixtures.
...