Bsi bs en 61300 2 35 2014

BS EN 61300-2-35:2014

BSI Standards Publication

Fibre optic interconnecting
devices and passive
components — Basic
test and measurement
procedures
Part 2-35: Tests — Cable nutation


BRITISH STANDARD

BS EN 61300-2-35:2014
National foreword

This British Standard is the UK implementation of EN 61300-2-35:2014. It is
identical to IEC 61300-2-35:2014. It supersedes BS EN 61300-2-35:1997
which is withdrawn.
The UK participation in its preparation was entrusted by Technical
Committee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic
interconnecting devices and passive components.
A list of organizations represented on this committee can be obtained on
request to its secretary.
This publication does not purport to include all the necessary provisions of
a contract. Users are responsible for its correct application.
© The British Standards Institution 2014.
Published by BSI Standards Limited 2014
ISBN 978 0 580 75736 5
ICS 33.180.20

Compliance with a British Standard cannot confer immunity from
legal obligations.

This British Standard was published under the authority of the
Standards Policy and Strategy Committee on 31 August 2014.

Amendments/corrigenda issued since publication
Date

Text affected


BS EN 61300-2-35:2014

EUROPEAN STANDARD

EN 61300-2-35

NORME EUROPÉENNE
EUROPÄISCHE NORM

July 2014

ICS 33.180.20

Supersedes EN 61300-2-35:1997

English Version

Fibre optic interconnecting devices and passive components Basic test and measurement procedures - Part 2-35: Tests Cable nutation
(IEC 61300-2-35:2014)
Dispositifs d'interconnexion et composants passifs à fibres
optiques - Procédures fondamentales d'essais et de
mesures - Partie 2-35: Essais - Nutation du câble
(CEI 61300-2-35:2014)

Lichtwellenleiter - Verbindungselemente und passive
Bauteile - Grundlegende Prüf- und Messverfahren - Teil 235: Prüfungen - Kabelnutation
(IEC 61300-2-35:2014)

This European Standard was approved by CENELEC on 2014-04-11. 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

© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 61300-2-35:2014 E


BS EN 61300-2-35:2014
EN 61300-2-35:2014

-2-

Foreword
The text of document 86B/3703/FDIS, future edition 2 of IEC 61300-2-35, prepared by SC 86B "Fibre
optic interconnecting devices and passive components" of IEC/TC 86 "Fibre optics" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN 61300-2-35:2014.
The following dates are fixed:
–

latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement

(dop)

2015-01-11

–

latest date by which the national standards conflicting with
the document have to be withdrawn

(dow)

2015-04-11

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.
This document supersedes EN 61300-2-35:1997.

Endorsement notice
The text of the International Standard IEC 61300-2-35:2014 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61753-1

NOTE Harmonized as EN 61753-1.


-3-

BS EN 61300-2-35:2014
EN 61300-2-35:2014

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
IEC 61300-3-1

Year
-

IEC 61300-3-3

-

IEC 61300-3-4

-

Title
Fibre optic interconnecting devices and
passive components - Basic test and
measurement procedures -- Part 3-1:
Examinations and measurements - Visual
examination
Fibre optic interconnecting devices and
passive components - Basic test and
measurement procedures -- Part 3-3:
Examinations and measurements - Active
monitoring of changes in attenuation and
return loss

Fibre optic interconnecting devices and
passive components - Basic test and
measurement procedures -- Part 3-4:
Examinations
and
measurements
Attenuation

EN/HD
EN 61300-3-1

Year
-

EN 61300-3-3

-

EN 61300-3-4

-


–2–

BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

CONTENTS
1

Scope .............................................................................................................................. 5

2

Normative references ...................................................................................................... 5

3

Terms and definitions ...................................................................................................... 5

4

General description ......................................................................................................... 6

5

Apparatus ........................................................................................................................ 6

6

5.1
Design of the apparatus ..................................................................................... 6
5.2
Optical measurements ....................................................................................... 9
Procedure ........................................................................................................................ 9

7

6.1

Preconditioning .................................................................................................. 9
6.2
Initial examinations and measurements .............................................................. 9
6.3
Conditioning ..................................................................................................... 10
6.4
Recovery ......................................................................................................... 10
6.5
Final examinations and measurements ............................................................ 10
Severity ......................................................................................................................... 10

8

Details to be specified ................................................................................................... 11

Annex A (informative) Example for a test set-up .................................................................. 12
Bibliography .......................................................................................................................... 13
Figure 1 – Test apparatus with vertical rotating DUT ............................................................... 7
Figure 2 – Test apparatus with horizontal rotating DUT ........................................................... 8
Figure 3 – Test apparatus with rotating deflection unit ............................................................ 9
Figure A.1 – Example for a test set-up .................................................................................. 12
Table 1 – Severities .............................................................................................................. 10


BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

–5–

FIBRE OPTIC INTERCONNECTING

DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-35: Tests – Cable nutation

1

Scope

This part of IEC 61300 details procedures for determining the suitability of a fibre optic device
to withstand nutation that may occur during operation, service, storage and/or transport. The
test is intended to indicate the performance of such devices when exposed to torsion and
bending as a combined load.

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 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-1: Examinations and measurements – Visual examination
IEC 61300-3-3, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-3: Examinations and measurements – Active monitoring of
changes in attenuation and return loss
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examinations and measurements – Attenuation

3

Terms and definitions

For the purposes of this document, the terms and definitions contained in the IEC 61300
series, some of which have been repeated here for convenience, and the following terms and
definitions apply.
3.1
deflection unit
rotating element with a cable feed through, able to describe a circle without transmitting
substantial torque to the cable
3.2
fixed clamping device
clamping device which prevents the device under test (DUT) moving during the test
3.3
fixed plate
plate with a cable feed through able to constrain any movement and twist of the cable in
relation to the DUT


–6–

BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

3.4
weight
element which applies the required tensile force to the cable end
3.5
nutation
combined flexing-rotation movements with tensile force

3.6
pulley
swivel pulley
3.7
rotating clamping device
clamping device, able to describe a circle without transmitting axial rotation to the DUT

4

General description

The purpose of environmental testing is to demonstrate that the DUT, under defined
environmental conditions, is able to survive without irreversible or reversible failures
according to the requirements.
The specimen is placed on the apparatus and subjected to a flexing rotation which is
maintained at a given temperature and relative humidity for a specified duration, as specified
in the relevant specification.

5
5.1

Apparatus
Design of the apparatus

The apparatus performs a flexing rotation, substantially without torque, of the cable adjacent
to the DUT in a conical path, with the axis of the cone being parallel with the longitudinal axis
of the specimen. During the rotation a tensile force is applied to the cable. Either the DUT or
the deflection unit may rotate, depending on the design of the apparatus. Examples of the test
apparatus are given in Figure 1, Figure 2 and Figure 3.

BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

–7–

x

DUT

x

a

x

b

Deflection
angle A

x
r
Swivel pulley

Weight

Tensile
force R
IEC

0412/14

Figure 1 – Test apparatus with vertical rotating DUT
The test apparatus in Figure 1 consists at least of the following elements:
a) rotating clamping device;
b) pulley;
c) weight for the tensile force.
The size of the pulley should not create additional attenuation during the rotation of the
connector. The design and size of the pulley should not cause a change in the load at the
connector. The maximum radius of the pulley depending on the allowed variation of the cone
angle should be calculated with the following equation:

rmax =

18 L
Aπ

where
L is conical path length;
A is the deflection angle (°) ;
±10% allowable tolerance of conical path length was assumed.


–8–

Rotating
clamping device

BS EN 61300-2-35:2014

IEC 61300-2-35:2014 © IEC 2014

DUT

Deflection angle A

Tensile
force R

Weight

IEC

0413/14

Figure 2 – Test apparatus with horizontal rotating DUT
The test apparatus in Figure 2 consists of at least the following elements:
1) rotating clamping device;
2) fixed plate;
3) weight for the tensile force.
The cable should be able to move freely and be driven to rotate such that its absolute
orientation is maintained.


BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

–9–

Fixed clamping

device
DUT
Deflection angle A

Deflection unit

Weight

Tensile
force R
IEC

0414/14

Figure 3 – Test apparatus with rotating deflection unit
The test apparatus in Figure 3 consists of at least the following elements:
i)

fixed clamping device;

ii)

deflection unit;

iii)

weight for the tensile force.

The cable should be able to move freely and be driven to rotate such that its absolute
orientation is maintained.

5.2

Optical measurements

Where active monitoring is specified, measuring equipment specified in IEC 61300-3-3 shall
be connected to the specimen for monitoring optical performance during the test. The optical
source and detector used to measure changes in attenuation shall comply with those
specified in IEC 61300-3-4.

6
6.1

Procedure
Preconditioning

Maintain the specimen under standard atmospheric conditions (room temperature condition)
for a minimum of 2 h.
Clean the specimen according to the manufacturer’s instructions.
6.2

Initial examinations and measurements

Complete initial examinations and measurements as required by the relevant specification.


BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

– 10 –
6.3

Conditioning

A tensile force is applied to the cable of the terminated assembly. The mated connector
assembly is held by the adaptor installed in the clamping device. The force is applied at the
deflection angle to the connector axis.
The test procedure consists of the following tasks and shall be performed in the following
order:
a) set up the apparatus to obtain the required deflection angle;
b) fix the specimen to the clamping device;
c) route the cable and apply the required tensile force to the cable end;
d) run the required number of cycles of rotation (360°) at a rate of 10 cycles per minute.
6.4

Recovery

Allow the specimen to remain under standard atmospheric conditions for a period of 10 min.
6.5

Final examinations and measurements

On completion of the test, remove all fixtures. Clean the mechanical and optical alignment
parts of the specimen according to the manufacturer’s instructions. Take final measurements
as required by the relevant specification. If specified, visually examine the specimen in
accordance with IEC 61300-3-1 and take any measurements specified to ensure that there is
no permanent damage.

7

Severity

The severity consists of the combination of the number of cycles of rotation, the deflection
angle and the tensile force applied to the cable. The severity shall be specified in the relevant
specification. The severities according to Table 1 may be used for the procedure.
Table 1 – Severities
Tensile
force, R
N

Deflection
angle A
°

Rotation
angle
°

Number
of cycles

Category

10

45

360

100

I


BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

8

– 11 –

Details to be specified

The following details, as applicable, shall be specified in the relevant specification:
a) description of the DUT;
b) cable type;
c) tensile force;
d) deflection angle;
e) number of cycles;
f)

specific mounting structures;

g) specimen optically functioning;
h) initial examinations and measurements and performance requirements;
i)

examinations and measurements during test and performance requirements;

j)

final examinations and measurements and performance requirements;

k) deviations from test procedure;
l)

additional pass/fail criteria.


– 12 –

BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

Annex A
(informative)
Example for a test set-up
An example of a real test set-up is shown in Figure A.1.

IEC

Figure A.1 – Example for a test set-up

0215/14


BS EN 61300-2-35:2014
IEC 61300-2-35:2014 © IEC 2014

– 13 –

Bibliography
IEC 61753-1, Fibre optic interconnecting devices and passive components performance
standard – Part 1: General and guidance for performance standards

_____________


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