IEC 61300-3-33:2022

IEC 61300-3-33 ®
Edition 3.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-33: Examinations and measurements – Withdrawal force from a resilient
alignment sleeve using pin gauges

Dispositifs d'interconnexion et composants passifs fibroniques – Procédures
fondamentales d’essais et de mesures –
Partie 3-33: Examens et mesures – Force d'extraction d'un manchon
d'alignement élastique, avec utilisation de calibres de broches

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 l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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 corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) 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 IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Découvrez notre puissant moteur de recherche et consultez
webstore.iec.ch/advsearchform gratuitement tous les aperçus des publications. Avec un
La recherche avancée permet de trouver des publications IEC abonnement, vous aurez toujours accès à un contenu à jour
en utilisant différents critères (numéro de référence, texte, adapté à vos besoins.
comité d’études, …). Elle donne aussi des informations sur les
projets et les publications remplacées ou retirées. Electropedia - www.electropedia.org

Le premier dictionnaire d'électrotechnologie en ligne au monde,
IEC Just Published - webstore.iec.ch/justpublished
avec plus de 22 300 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 19 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
Disponible en ligne et une fois par mois par email.
Electrotechnique International (IEV) en ligne.

Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC Products & Services Portal - products.iec.ch

IEC 61300-3-33 ®
Edition 3.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures –
Part 3-33: Examinations and measurements – Withdrawal force from a resilient

alignment sleeve using pin gauges

Dispositifs d'interconnexion et composants passifs fibroniques – Procédures

fondamentales d’essais et de mesures –

Partie 3-33: Examens et mesures – Force d'extraction d'un manchon

d'alignement élastique, avec utilisation de calibres de broches

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-1073-9

– 2 – IEC 61300-3-33:2022 © IEC 2022
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General description . 5
5 Apparatus . 6
5.1 General . 6
5.2 Pin gauges . 6
5.3 Stopper . 7
5.4 Force generator . 7
5.5 Force gauge . 7
5.6 Flexible joints . 7
6 Procedure . 7
6.1 General . 7
6.2 Preconditioning . 7
6.3 Testing . 8
7 Details to be specified and reported. 8
Annex A (normative) Loading velocity . 9
Annex B (informative) Round-robin test results of zirconia alignment sleeves . 10
B.1 Test configuration . 10
B.1.1 Specimen . 10
B.1.2 Apparatus . 10
B.2 Test results . 11
Bibliography . 12

Figure 1 – Example of test apparatus . 6
Figure B.1 – Test apparatus . 10
Figure B.2 – Round-robin test results . 11

Table 1 – Minimum requirements of pin gauge . 7
Table B.1 – Pin gauge specification . 10

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

Part 3-33: Examinations and measurements –
Withdrawal force from a resilient alignment sleeve using pin gauges

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.
IEC 61300-3-33 has been prepared by subcommittee 86B: Fibre optic interconnecting devices
and passive components, of IEC technical committee 86: Fibre optics. It is an International
Standard.
This third edition cancels and replaces the second edition published in 2012. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) harmonize "gauge pin" to "pin gauge";
b) update test apparatus in Figure 1;
c) change of clause structure;
d) specified pin gauge requirements in Table 1.

– 4 – IEC 61300-3-33:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
86B/4559/FDIS 86B/4583/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
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.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-33: Examinations and measurements –
Withdrawal force from a resilient alignment sleeve using pin gauges

1 Scope
This part of IEC 61300 describes the procedure to measure the withdrawal force between the
pin gauge and the resilient alignment sleeve. This measurement procedure is applicable to
single-fibre cylindrical ferrule optical connectors.
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 61300-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 1: General and guidance
IEC 61754 (all parts), Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
resilient alignment sleeve
split sleeve in zirconia or metal material that align in its bore the ferrules of connector
4 General description
The contact force between the mating ferrules in a fibre optic connector is the difference
between the breakaway friction force and the spring force of the connector. To maintain contact,
the breakaway friction force shall remain below the spring force.
The ferrule withdrawal force is the highest force (breakaway force) required to remove one of
the ferrules from the sleeve of a fibre optic connector.

– 6 – IEC 61300-3-33:2022 © IEC 2022
The mechanics of friction result in significant variations in the measurement of breakaway
friction force. The criteria to be applied to the results of these measurements shall account for
the spread that is inherent in the mechanism being measured (see Annex B).
5 Apparatus
5.1 General
The test apparatus shall be such that only two forces are applied to the moving pin gauge: the
force withdrawing the pin, and the frictional force between the pin gauge and the sleeve. The
force to extract the pin gauge shall be in the axis of the resilient sleeve bore (pins external
diameter). An example of test apparatus is shown in Figure 1, which is applied force to the end
of one of the pin gauges and to the edge of the sleeve.

Figure 1 – Example of test apparatus
5.2 Pin gauges
The pin gauges shall be made of zirconia ceramics. The pin gauge assembly consists of the pin
gauge and a fixture for the application of load. The pin gauge specifications shall meet the
relevant connector interface standard according to IEC 61754 (all parts). Unless otherwise
specified in the relevant documents, the minimum requirements of pin gauge for commonly used
resilient alignment sleeve are shown in Table 1.

Table 1 – Minimum requirements of pin gauge
Items For 1,25 mm For 2,5 mm
Material Zirconia Zirconia
Diameter [mm] 1,249 ± 0,000 2 2,499 ± 0,000 5
Surface roughness (Ra) 0,000 2 0,000 2
[mm]
Length [mm] 4,2 7,5
Edge shape Break sharp edges Break sharp edges

5.3 Stopper
The stopper shall have a slit to prevent movement of the resilient alignment sleeve during the
load application. The stopper material shall have a stiffness greater than or equal to that of the
resilient alignment sleeve material. The width of the stopper slit shall be larger than the outer
diameter of the pin gauge but smaller than the outer diameter of the resilient alignment sleeve.
NOTE Stiffness includes material properties and geometries.
5.4 Force generator
The force generator may be any device or apparatus capable of smoothly applying the specified
force at the specified rate.
5.5 Force gauge
A force gauge having the specified measurement uncertainty shall be used to measure the axial
force applied to the specimen.
5.6 Flexible joints
The force applied to the pin gauge shall be along the axis of the resilient alignment sleeve in
order to avoid bending load and resilient alignment split sleeve opening. The flexible joints or
swivel joints should be used to apply such forces at the end of at least one pin.
6 Procedure
6.1 General
Effort should be taken during the test to avoid any contamination of the sleeves or gauges.
Unless otherwise specified, the test shall be performed at the standard atmospheric conditions
specified in IEC 61300-1.
6.2 Preconditioning
Prior to testing, each resilient alignment sleeve and pin gauge shall be cleaned by wiping, using
for example lint-free wipes and swabs. The cleaning action shall consist of thorough rubbing or
scrubbing. Moistened wipes should be avoided. If wet cleaning is necessary, using a solvent
such as alcohol to remove stuck on contamination, the resilient alignment sleeve and/or pin
gauges shall be preconditioned to ensure the solvent is sufficiently removed. The post wet
cleaned resilient alignment sleeves and/or ping gauges shall be preconditioned at 40 °C for
0,5 h minimum. After this preconditioning, the resilient alignment sleeves and/or pin gauges
shall be allowed to rest at standard atmospheric conditions for a minimum of 0,5 h before the
test is performed. After wet cleaning, dry wiping should remove solvent residue (see also
IEC TR 62627-01).
Solvents and cleaning agents should be choosed in the observance of safety rules.

– 8 – IEC 61300-3-33:2022 © IEC 2022
6.3 Testing
a) Insert the two pin gauges into either side of the resilient alignment sleeve until they touch
at the centre of the sleeve. The interface between the two pin gauges shall be located within
10 % of the length of the sleeve from the centre of the sleeve itself.
b) Securely mount pin gauge A to the test fixture. Make sure the stopper is located between
pin gauge A and the edge of the resilient alignment sleeve. During the test, the resilient
alignment sleeve shall be free to move in the radial direction.
c) To compensate for the weight of the test fixture, the indicator on the force gauge shall be
adjusted to zero.
d) Force shall be applied at a continuous rate (see Annex A). The maximum force applied to
the pin gauge shall be recorded during extraction of the first third part of the whole length
of the pin gauge inserted into the sleeve.
e) Unless otherwise specified, an equal number of measurements shall be made from each
end of the sleeve.
f) Unless otherwise specified, the set of data from the end of the sleeve with the higher values
of withdrawal force shall be used to characterize the sleeve.
7 Details to be specified and reported
The following details, as applicable, shall be specified in the relevant specification and shall be
reported in the test report:
– pin gauge characteristics (dimensions and surface roughness);
– resilient alignment sleeve characteristics;
– maximum allowable ferrule withdrawal force;
– pre-conditioning procedure;
– environmental test conditions (temperature and humidity);
– configuration of the component under test;
– sampling plan;
– number of times the test is performed on each component;
– procedures for analysis of the data;
– acceptance/failure criteria;
– any deviations from measuring procedure;
– peak error calculated;
– measurement uncertainty.
Annex A
(normative)
Loading velocity
The rate at which force applied to the test unit shall be increased is limited by the response or
the capture rate of the force gauge. With a mechanically driven instrument, the rate at which
force increases is a function of both the velocity of the cross-head and the stiffness of the
linkage between the cross-head and the test unit.
Loading rates of approximately 100 mm/min are generally considered acceptable for mech-
anically driven instruments. The following equation may be used to evaluate peak error:
KV
E =
R
c
where
K is the system stiffness;
V is the velocity of the crosshead;
R is the capture rate of the force gauge.
c
System stiffness is the ratio of the increase in force on the test unit divided by the change in
position of the cross-head. If the system is very stiff, a compliant link may be added between
the cross-head and the test unit to decrease stiffness. The capture rate of the force gauge is
calculated by number of events during test divided by testing time.
...