IEC 61300-2-9:2017

Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-9: Tests - Shock

IEC 61300-2-9: 2017 defines a test method to reveal mechanical weakness and/or degradation of fibre optic devices when subjected to repetitive or non-repetitive mechanical shocks. It simulates infrequent repetitive or non-repetitive shocks likely to be encountered in normal service or during transportation. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- inserted clause "Terms and definitions";
- added precise descriptions to clause "Apparatus";
- added sub clause "Testing" into clause "Procedure";
- added "Bibliography".

Dispositifs d'interconnexion et composants passifs à fibroniques - Procédures fondamentales d'essais et de mesures - Partie 2-9: Essais - Chocs

IEC 61300-2-9:2017 définit une méthode d’essai destinée à mettre en évidence les faiblesses mécaniques et/ou les dégradations des dispositifs fibroniques lorsque ceux-ci sont soumis à des chocs mécaniques, répétitifs ou non. Cette procédure consiste à simuler les chocs peu fréquents, répétitifs ou non, qui sont susceptibles de se produire dans des conditions normales de fonctionnement ou au cours du transport. Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique.Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: article inséré «Termes et définitions», descriptions précises ajoutées à l’article «Appareillage».

General Information

• Status: Published
• Publication Date: 05-Jan-2017
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Drafting Committee: WG 4 - TC 86/SC 86B/WG 4
• Current Stage: PPUB - Publication issued
• Start Date: 06-Jan-2017
• Completion Date: 18-Jan-2017

Relations

• Revises: IEC 61300-2-9:2010 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-9: Tests - Shock
• Effective Date: 05-Sep-2023

Overview

IEC 61300-2-9:2017 specifies a standardized shock test method for fibre optic interconnecting devices and passive components. The standard defines how to expose a device under test (DUT) to repetitive or non‑repetitive mechanical shocks-simulating infrequent shocks encountered in normal service or during transportation-to reveal mechanical weakness or degradation. This third edition is a technical revision that adds terms and definitions, more precise apparatus descriptions, a testing sub‑clause in the procedure, and a bibliography.

Key topics and technical requirements

• Test objective: Reveal mechanical weakness/degradation of fibre‑optic devices under shock loading representative of transport or service environments.
• Pulse shape: Tests use half‑sinusoidal shock pulses measured at defined check points; pulse tolerances and monitoring intervals are specified.
• Shock directions and counts: DUTs are subjected to two or three shock pulses in each direction of three mutually perpendicular axes.
• Apparatus: Acceptable shock machines include free‑fall, resilient‑rebound, nonresilient, hydraulic, compressed‑gas or equivalent systems. Machines must produce calibrated accelerations and the specified half‑sine excitation at checkpoints.
• Repetition rate: Selected so relative motion within the DUT between shocks is substantially zero and measured acceleration meets pulse tolerances.
• Velocity change: Actual velocity change must be within ±15% of the nominal value. When integrated from acceleration, the integration window is from 0.4 D before the pulse to 0.1 D after the pulse (D = nominal pulse duration).
• Cross‑axis motion: The standard limits unintended acceleration perpendicular to the intended shock direction (see clause 5.1.4 for tolerance requirements).
• Procedure steps: Preparation of DUT, pre‑conditioning, initial examinations and measurements, testing, recovery, and final examinations (visual and optical-transient loss and power measurements).
• Shock severity: Defined as the combined effect of peak acceleration, pulse duration, and number of shocks.

Applications and who uses it

• Manufacturers of fibre optic connectors, adapters, pigtails, splice closures, and passive modules for product qualification and design validation.
• Test laboratories and OEM QA teams performing standardized shock testing for compliance and reliability assessment.
• Systems integrators and transport engineers assessing packaging and handling robustness for fibre‑optic assemblies.
• Practical benefits: predictable, repeatable shock testing; improved product reliability in shipment and field use; basis for product specifications and acceptance criteria.

Related standards

• IEC 61300 series (basic test and measurement procedures)
• IEC 61300-1 (General and guidance)
• IEC 61300-3-1 (Visual examination)
• IEC 61300-3-28 (Transient loss measurement)
• IEC 60068-1 (Environmental testing – general)
• ISO 2041 (Vocabulary for mechanical vibration and shock)

Keywords: IEC 61300-2-9, shock test, fibre optic, passive components, half-sine pulse, DUT, shock machine, transport simulation, qualification.

Standards Content (Sample)

IEC 61300-2-9 ®
Edition 3.0 2017-01
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-9: Tests – Shock
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
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 61300-2-9 ®
Edition 3.0 2017-01
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures –
Part 2-9: Tests – Shock
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-8322-3770-0

– 2 – IEC 61300-2-9:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General description . 7
5 Apparatus . 7
5.1 Shock machine . 7
5.1.1 General . 7
5.1.2 Repetition rate . 8
5.1.3 Velocity change tolerances . 8
5.1.4 Cross axis motion . 8
5.1.5 Acceleration measuring system . 8
5.2 Mounting fixture . 9
5.3 Optical power measuring equipment . 9
6 Procedure . 9
6.1 Preparation of DUT . 9
6.2 Pre-conditioning . 10
6.3 Initial examinations and measurements . 10
6.4 Testing . 10
6.5 Recovery . 10
6.6 Final examination and measurements . 10
7 Shock severity . 11
8 Details to be specified . 11
Bibliography . 12

Figure 1 – Fixing points . 6
Figure 2 – Pulse shape and limits of tolerance for half-sine pulse . 7
Figure 3 – Frequency characteristics of the overall measuring system without low-pass
filter . 9

Table 1 – Required frequency characteristic values for the overall measuring system . 9
Table 2 – Severity for passive components and modules . 11
Table 3 – Severity for fibre management systems and closures . 11

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

Part 2-9: Tests – Shock
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
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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 61300-2-9 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 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) inserted clause "Terms and definitions";
b) added precise descriptions to clause "Apparatus";
c) added sub clause "Testing" into clause "Procedure";
d) added "Bibliography".
– 4 – IEC 61300-2-9:2017 © IEC 2017
The text of this International Standard is based on the following documents:
CDV Report on voting
86B/3979/CDV 86B/4017/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61300 series, published under the general title Fibre optic
interconnecting devices and passive components, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 2-9: Tests – Shock
1 Scope
This part of IEC 61300 defines a test method to reveal mechanical weakness and/or
degradation of fibre optic devices when subjected to repetitive or non-repetitive mechanical
shocks. It simulates infrequent repetitive or non-repetitive shocks likely to be encountered in
normal service or during transportation.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition
...

IEC 61300-2-9 ®
Edition 3.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-9: Tests – Shock
Dispositifs d’interconnexion et composants passifs fibroniques – Procédures
fondamentales d’essais et de mesures –
Partie 2-9: Essais – Chocs
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 61300-2-9 ®
Edition 3.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures –
Part 2-9: Tests – Shock
Dispositifs d’interconnexion et composants passifs fibroniques – Procédures

fondamentales d’essais et de mesures –

Partie 2-9: Essais – Chocs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-4946-8

– 2 – IEC 61300-2-9:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General description . 7
5 Apparatus . 7
5.1 Shock machine . 7
5.1.1 General . 7
5.1.2 Repetition rate . 8
5.1.3 Velocity change tolerances . 8
5.1.4 Cross axis motion . 8
5.1.5 Acceleration measuring system . 8
5.2 Mounting fixture . 9
5.3 Optical power measuring equipment . 9
6 Procedure . 9
6.1 Preparation of DUT . 9
6.2 Pre-conditioning . 10
6.3 Initial examinations and measurements . 10
6.4 Testing . 10
6.5 Recovery . 10
6.6 Final examination and measurements . 10
7 Shock severity . 11
8 Details to be specified . 11
Bibliography . 12

Figure 1 – Fixing points . 6
Figure 2 – Pulse shape and limits of tolerance for half-sine pulse . 7
Figure 3 – Frequency characteristics of the overall measuring system without low-pass
filter . 9

Table 1 – Required frequency characteristic values for the overall measuring system . 9
Table 2 – Severity for passive components and modules . 11
Table 3 – Severity for fibre management systems and closures . 11

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

Part 2-9: Tests – Shock
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 61300-2-9 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This bilingual version (2017-10) corresponds to the monolingual English version, published in
2017-01.
This third edition cancels and replaces the second edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) inserted clause "Terms and definitions";
b) added precise descriptions to clause "Apparatus";

– 4 – IEC 61300-2-9:2017 © IEC 2017
c) added sub clause "Testing" into clause "Procedure";
d) added "Bibliography".
The text of this International Standard is based on the following documents:
CDV Report on voting
86B/3979/CDV 86B/4017/RVC
Full information on the voting for the approval of this International 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 document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61300 series, published under the general title Fibre optic
interconnecting devices and passive components, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 2-9: Tests – Shock
1 Scope
This part of IEC 61300 defines a test method to reveal mechanical weakness and/or
degradation of fibre optic devices when subjected to repetitive or non-repetitive mechanical
shocks. It simulates infrequent repetitive or non-repetitive shocks likely to be encountered in
normal service or during transportation.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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 60068-1, Environmental testing – Part 1: General and guidance
IEC 61300-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 1: General and guidance
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 61300-3-28, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-28: Examinations and measurements – Transient loss
ISO 2041, Mechanical vibration, shock and condition monitoring – Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041 and
IEC 60068-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
check point
point located on the fixture, on the table surface of the shock machine, or on the DUT as
close as possible to the fixing point and rigidly connected to it
Note 1 to entry A number of check points may be used to ensure the test requirements are satisfied.
Note 2 to entry If the DUT is attached by more than four fixing points, the relevant specification should state the
number of fixing points that are to be used as check points.

– 6 – IEC 61300-2-9:2017 © IEC 2017
Note 3 to entry In special cases, for example, for large or complex DUTs, the check points will be prescribed by
the relevant specification.
Note 4 to entry If a small DUT is mounted on one fixture or a large number of small DUTs are mounted on one
fixture, or where there are a number of fixing points, a single check point (that is the reference point) may be
selected for the derivation of the control signal. This signal is then related to the fixture rather than to the fixing
points of the DUT(s). This procedure is only valid when the lowest resonance frequency of the loaded fixture is well
above the upper frequency of the test.
3.2
fixing point
point on the DUT in contact with the fixture (Figure 1a) or the table of the shock machine at a
location where the DUT is normally fastened in service
Note 1 to entry If a part of the real mounting structure is used as the fixture, the fixing points are taken as those
where the real mounting structure contacts the table (Figure 1b) and not where the product contacts the real
mounting structure.
DUT
Fixing points
Fixture
Table of shock-testing machine
IEC
a) Fixing points using a fixture
DUT
Real mounting structure
Fixing points
Table of shock-testing machine
IEC
b) Fixing points using a real mounting structure as a fixture
Figure 1 – Fixing points
3.3
repetition rate
number of shocks per second
3.4
shock severity
combination of the peak acceleration, the duration of the nominal pulse and the number of
shocks
3.5
velocity change
absolute value of the sudden change of velocity resulting from the application of the specified
acceleration
4 General description
A device under test (DUT) is mounted on the table of the shock machine and is subjected to
half-sinusoidal shock pulses. The DUT is exposed to two or three shock pulses applied in
each direction of three mutually perpendicular axes in accordance with severities (see
Clause 7).
Wherever possible, the severity of the pulse applied to the DUT should be such as to
reproduce the effects of the actual transport or operational environment to which the DUT will
be subjected, or to satisfy the design requirements. The DUT is always mounted to the fixture
or the table of the shock machine during testing.
5 Apparatus
5.1 Shock machine
5.1.1 General
The shock machine may be of the free fall, resilient rebound, nonresilient, hydraulic,
compressed gas or other activating type. The shock machine shall be capable of generating a
calibrated acceleration when loaded with a DUT, with or without a fixture. The shock machine
shall be capable of generating a half-sinusoidal excitation measured at the checkpoints, within
the tolerance shown by the solid lines in Figure 2.
Integration time
1,5 D
1,2 A
A
0,8 A
+0,2 A
0,2 A  0,2 A
0  0
–0,2 A –0,2 A
0,1 D
0,4 D
D D
2,5 D 2,5 D
2,4 D = T
6 D = T
IEC
Time (relative value)
Key
– – – nominal pulse
A = peak acceleration of nominal pulse
tolerence
T = minimum time during which the pulse shall be monitored for shocks produced using a conventional shock
machine
D = duration of nominal pulse
T = minimum time during which the pulse shall be monitored for shocks produced using a vibration generator
Figure 2 – Pulse shape and limits of tolerance for half-sine pulse
Acceleration (relative value)
– 8 – IEC 61300-2-9:2017 © IEC 2017
5.1.2 Repetition rate
The repetition rate shall be such that the relative motion within the DUT between shocks shall
be substantially zero and the value of acceleration at the check point shall be within the limits
shown in Figure 2.
5.1.3 Velocity change tolerances
For all pulse shapes, the actual velocity change shall be within ±15 % of the value
corresponding to the nominal pulse.
Where the velocity change is determined by integration of the actual acceleration pulse, this
shall be effected from 0,4 D before the pulse to 0,1 D beyond the pulse, where D is the
duration of the nominal pulse.
If the velocity change tolerance cannot be achieved without the use of elaborate facilities, the
relevant specification shall state the alternative procedure to be adopted.
5.1.4 Cross axis motion
The positive or negative peak acceleration at the check point(s), perpendicular to the intended
shock direction, shall not exceed 30 % of the value of the peak acceleration of the nominal
pulse in the intended direction, when determined by 5.1.5.
If the cross axis motion tolerance cannot be achieved, the relevant specification shall state
the alternative procedure to be adopted.
5.1.5 Acceleration measuring system
The characteristics of the measuring system shall be such that it can be determined that the
true value of the actual pulse, as measured above, in the intended direction at the
checkpoint(s) is within the tolerances required by Figure 2.
The requirements of Figure 3 apply to the frequency response of the measuring system
without the use of a low-pass filter on the control signal. When a low-pass filter is used, the
characteristics of the filter should be such that its cut-off frequency fg (–3 dB point) is not
lower than:
1,5
fg =
D
where
fg is the cut-off frequency of a low-pass filter in kHz;
D is the duration of nominal pulse in ms.
The frequency response of the overall measuring system, which includes the accelerometer,
can have a significant effect on the accuracy and shall be within the limits shown in Figure 3
and Table 1.
+1
–1
24 dB/octave
–10
f f f f
1 2 3 4
Frequency (Hz)
IEC
Figure 3 – Frequency characteristics of the overall measuring system
without low-pass filter
Table 1 – Required frequency characteristic values
for the overall measuring system
Duration of pulse Low-frequency High-frequency Frequency beyond
cut-off cut-off which the response may
rise above +1 dB
ms Hz kHz kHz
D f f f f
1 2 3 4
1 4 20 10 20
11 0,5 2 1 2
SOURCE: adapted from IEC 60068-2-27:2008

5.2 Mounting fixture
The DUT shall be prepared and mounted with accessories as specified in the relevant
specification and fastened to the table of the shock machine.
5.3 Optical power measuring equipment
Unless otherwise specified, measuring equipment specified in IEC 61300-3-28 shall be
connected to the DUT for monitoring the transient loss to detect fast variation of attenuation.
6 Procedure
6.1 Preparation of DUT
Prepare the DUT according to the manufacturer´s instructions or as specified in the relevant
specification.
Acceleration (relative value) (dB)

– 10 – IEC 61300-2-9:2017 © IEC 2017
6.2 Pre-conditioning
Pre-condition the DUT for 2 h at the standard atmospheric condition specified in IEC 61300-1
unless otherwise specified in the relevant specification.
6.3 Initial examinations and measurements
Complete initial examinations and measurements of the DUT as required by the relevant
specification.
6.4 Testing
The DUT shall be mounted rigidly to the fixture in a manner that simulates normal mounting
as closely as possible. A minimum length of 200 mm of optical fibre/cable shall be
unsupported on both ends of the DUT and be attached free of tension to the table of a shock
machine. Conduct the procedure as outlined in 6.5 and 6.6.
The number of shocks prescribed by the relevant specification shall be applied successively
in each direction of three mutually perpendicular axes of the DUT. When testing a number of
identical DUTs, they may be oriented so that the shocks are applied simultaneously along
these three axes (see Clause 7).
Where the position of the DUT, when mounted or transported, is known, and since shocks are
generally of greatest significance in one direction of one axis, the relevant specification shall
state the specified number of shocks that shall be applied and in which axis, direction and
position. Otherwise, three axes and two directions shall be tested. For example, usually the
highest levels of shock acceleration are along the vertical axis. When the position during
transportation is known, the shocks should be applied in what will be the vertical axis in the
upward direction. Where the position is unknown, the specified number of shocks shall be
applied in each of the axes prescribed by the relevant specification (see Clause 7).
The relevant specification shall state whether the DUT shall operate during testing and if any
functional monitoring is required.
6.5 Recovery
Allow the DUT to remain on the fixture for 1 min unless otherwise specified in the relevant
specification.
6.6 Final examination and measurements
On completion of the test, remove all fixtures, clean the DUT in accordance with the
manufacturer’s instruction and inspect the DUT and make final measurements as defined by
the relevant specification, to ensure that there is no permanent damage to the DUT. The
relevant specification shall provide the criteria upon which the acceptance or rejection of the
DUT shall be based.
Unless otherwise specified, visually examine the DUT in accordance with IEC 61300-3-1.
Check for evidence of any degradation in the DUT. This may include, for example
• broken, loose or damaged parts and/or accessories,
• broken or damaged cable sheath, seals, strain relief or fibres, and
• displaced, bent, broken or damaged parts.

7 Shock severity
The Shock severity consists of the combination of peak acceleration, the duration of the
nominal pulse and number of shocks. The severity shall be specified in the relevant
specification. Recommended values of the test parameters are given in Tables 2 and 3.
Table 2 – Severity for passive components and modules
Parameter Value
Wave form Half sinusoidal
Acceleration Component or module mass ≤ 0,125 kg:
5 000 m/s
...