Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-55: Tests - Strength of mounted adaptor

IEC 61300-2-55:2017 describes the test procedure to measure the mounting strength of an optical adaptor or receptacle to a fixture.

Dispositifs d'interconnexion et composants passifs fibroniques - Procédures fondamentales d'essais et de mesures - Partie 2-55: Essais - Résistance du raccord monté

IEC 61300-2-55:2017 décrit la procédure d’essai pour mesurer la résistance de montage d’un raccord ou embase optique sur une fixation.

General Information

Status
Published
Publication Date
08-Mar-2017
Current Stage
PPUB - Publication issued
Start Date
09-Mar-2017
Completion Date
09-Mar-2017
Ref Project

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IEC 61300-2-55
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-55: Tests – Strength of mounted adaptor
IEC 61300-2-55:2017-03(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

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Switzerland www.iec.ch
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---------------------- Page: 2 ----------------------
IEC 61300-2-55
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-55: Tests – Strength of mounted adaptor
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-8322-4076-2

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC 61300-2-55:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

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

5 Apparatus ........................................................................................................................ 6

5.1 Loading method ...................................................................................................... 6

5.1.1 General ........................................................................................................... 6

5.1.2 Method A ......................................................................................................... 7

5.1.3 Method B ......................................................................................................... 7

5.2 Force generator ...................................................................................................... 8

5.3 Force gauge ........................................................................................................... 8

5.4 Holding fixture ........................................................................................................ 8

5.5 Fixture .................................................................................................................... 8

5.6 Timer ...................................................................................................................... 8

6 Procedure ........................................................................................................................ 9

6.1 General description ................................................................................................. 9

6.2 Pre-conditioning ...................................................................................................... 9

6.3 Initial examination and measurement ...................................................................... 9

6.4 Mount DUT ............................................................................................................. 9

6.5 Conditioning ............................................................................................................ 9

6.6 Recovery ................................................................................................................ 9

6.7 Final examination and measurement ....................................................................... 9

7 Severity ........................................................................................................................... 9

8 Details to be specified ................................................................................................... 10

Annex A (normative) Fixture information .............................................................................. 11

Bibliography .......................................................................................................................... 15

Figure 1 – Example of test apparatus for method A ................................................................. 7

Figure 2 – Example of test apparatus for method B ................................................................. 8

Figure A.1 – Fixture cut-out information for SC simplex adaptor ............................................ 11

Figure A.2 – Fixture cut-out information for SC duplex adaptor ............................................. 11

Figure A.3 – Fixture cut-out information for LC simplex adaptor ............................................ 12

Figure A.4 – Fixture cut-out information for LC duplex (square flange) adaptor ..................... 12

Figure A.5 – Fixture cut-out information for LC duplex (rectangular flange) adaptor .............. 13

Figure A.6 – Fixture cut-out information for LC quad (rectangular flange) adaptor ................. 13

Figure A.7 – Fixture cut-out information for MPO adaptor ..................................................... 13

Table 1 – Recommended severity value .................................................................................. 9

Table A.1 – Dimensions for SC simplex adaptor .................................................................... 11

Table A.2 – Dimensions for SC duplex adaptor ..................................................................... 12

Table A.3 – Dimensions for LC simplex adaptor .................................................................... 12

Table A.4 – Dimensions for LC duplex (square flange) adaptor ............................................. 12

---------------------- Page: 4 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 3 –

Table A.5 – Dimensions for LC duplex (rectangular flange) adaptor ...................................... 13

Table A.6 – Dimensions for LC quad (rectangular flange) adaptor ......................................... 13

Table A.7 – Dimensions for MPO adaptor ............................................................................. 14

---------------------- Page: 5 ----------------------
– 4 – IEC 61300-2-55:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-55: Tests – Strength of mounted adaptor
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

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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

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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

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interested IEC National Committees.

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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

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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

...

IEC 61300-2-55
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-55: Tests – Strength of mounted adaptor
Dispositifs d’interconnexion et composants passifs fibroniques – Procédures
fondamentales d’essais et de mesures –
Partie 2-55: Essais – Résistance du raccord monté
IEC 61300-2-55:2017-03(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2017 IEC, Geneva, Switzerland

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---------------------- Page: 2 ----------------------
IEC 61300-2-55
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 2-55: Tests – Strength of mounted adaptor
Dispositifs d’interconnexion et composants passifs fibroniques – Procédures
fondamentales d’essais et de mesures –
Partie 2-55: Essais – Résistance du raccord monté
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-9357-7

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61300-2-55:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

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

5 Apparatus ........................................................................................................................ 6

5.1 Loading method ...................................................................................................... 6

5.1.1 General ........................................................................................................... 6

5.1.2 Method A ......................................................................................................... 7

5.1.3 Method B ......................................................................................................... 7

5.2 Force generator ...................................................................................................... 8

5.3 Force gauge ........................................................................................................... 8

5.4 Holding fixture ........................................................................................................ 8

5.5 Fixture .................................................................................................................... 8

5.6 Timer ...................................................................................................................... 8

6 Procedure ........................................................................................................................ 9

6.1 General description ................................................................................................. 9

6.2 Pre-conditioning ...................................................................................................... 9

6.3 Initial examination and measurement ...................................................................... 9

6.4 Mount DUT ............................................................................................................. 9

6.5 Conditioning ............................................................................................................ 9

6.6 Recovery ................................................................................................................ 9

6.7 Final examination and measurement ....................................................................... 9

7 Severity ........................................................................................................................... 9

8 Details to be specified ................................................................................................... 10

Annex A (normative) Fixture information .............................................................................. 11

Bibliography .......................................................................................................................... 15

Figure 1 – Example of test apparatus for method A ................................................................. 7

Figure 2 – Example of test apparatus for method B ................................................................. 8

Figure A.1 – Fixture cut-out information for SC simplex adaptor ............................................ 11

Figure A.2 – Fixture cut-out information for SC duplex adaptor ............................................. 11

Figure A.3 – Fixture cut-out information for LC simplex adaptor ............................................ 12

Figure A.4 – Fixture cut-out information for LC duplex (square flange) adaptor ..................... 12

Figure A.5 – Fixture cut-out information for LC duplex (rectangular flange) adaptor .............. 13

Figure A.6 – Fixture cut-out information for LC quad (rectangular flange) adaptor ................. 13

Figure A.7 – Fixture cut-out information for MPO adaptor ..................................................... 13

Table 1 – Recommended severity value .................................................................................. 9

Table A.1 – Dimensions for SC simplex adaptor .................................................................... 11

Table A.2 – Dimensions for SC duplex adaptor ..................................................................... 12

Table A.3 – Dimensions for LC simplex adaptor .................................................................... 12

Table A.4 – Dimensions for LC duplex (square flange) adaptor ............................................. 12

---------------------- Page: 4 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 3 –

Table A.5 – Dimensions for LC duplex (rectangular flange) adaptor ...................................... 13

Table A.6 – Dimensions for LC quad (rectangular flange) adaptor ......................................... 13

Table A.7 – Dimensions for MPO adaptor ............................................................................. 14

---------------------- Page: 5 ----------------------
– 4 – IEC 61300-2-55:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-55: Tests – Strength of mounted adaptor
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 61300-2-55 has been prepared by subcommittee 86B: Fibre optic

interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.

The text of this International Standard is based on the following documents:
FDIS Report on voting
86B/4054/FDIS 86B/4067/RVD

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.

---------------------- Page: 6 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 5 –

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 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.
---------------------- Page: 7 ----------------------
– 6 – IEC 61300-2-55:2017 © IEC 2017
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 2-55: Tests – Strength of mounted adaptor
1 Scope

This part of IEC 61300 describes the test procedure to measure the mounting strength of an

optical adaptor or receptacle to a fixture.
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 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-1: Examinations and measurements – Visual examination

3 Terms and definitions
No terms and definitions are listed in this document.

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
4 General description

The device under test (DUT) is an optical connector adaptor or receptacle mounted to a

fixture. A force is applied to the adaptor or receptacle at the specified rate until the required

load has been reached.
5 Apparatus
5.1 Loading method
5.1.1 General

The test apparatus shall be capable of applying an axial load to the DUT. Two methods for

applying the load are shown in Figure 1 and Figure 2.
---------------------- Page: 8 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 7 –
5.1.2 Method A

The axial load is applied to the DUT via the force gauge and the holding fixture attached to

the DUT as shown in Figure 1.
Direction of force
Force gauge
Holding fixture
DUT
Fixture
IEC
Figure 1 – Example of test apparatus for method A
5.1.3 Method B

The axial load is applied directly to the DUT via the force gauge only, as shown in Figure 2.

---------------------- Page: 9 ----------------------
– 8 – IEC 61300-2-55:2017 © IEC 2017
Direction of force
Force gauge
DUT
Fixture
IEC
Figure 2 – Example of test apparatus for method B
5.2 Force generator

The force generator may be any device or apparatus capable of smoothly applying the

specified force at the specified rate.
5.3 Force gauge

A force gauge of specified uncertainty shall be used to measure the axial force applied to the

DUT.
5.4 Holding fixture

A suitable holding fixture shall be used in method A to couple the force generator to the DUT.

A connector plug may be used as a holding fixture. Care shall be taken in the design and use

of the holding fixture to ensure that it does not apply compressive forces which might deform

or break the DUT.
5.5 Fixture

The fixture shall be rigid enough not to bend during the test. The cut-outs for IEC 61754-4

series (SC), IEC 61754-7 series (MPO) and IEC 61754-20 (LC) are given in Annex A. For

other connector styles, give the cut-out dimensions and panel thickness dimension as part of

the details to be specified (see Clause 8).
5.6 Timer
A device measures the total time the force is applied.
---------------------- Page: 10 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 9 –
6 Procedure
6.1 General description

Unless otherwise specified, the test shall be performed under standard test conditions and the

DUT shall be subjected to the test procedure according to 6.2 to 6.7.
6.2 Pre-conditioning

Unless otherwise specified, pre-condition each DUT for more than or equal to 2 h at the

standard atmospheric conditions specified in IEC 61300-1.
6.3 Initial examination and measurement

Initial examinations and measurements on the DUT shall be made as required by the relevant

specification. Visual examination shall be done according to IEC 61300-3-1.
6.4 Mount DUT
Securely mount the DUT to the apparatus as shown in Figure 1 or Figure 2.
6.5 Conditioning

Smoothly apply the force at the specified rate up to the specified value and hold for the

specified duration according to the relevant specification. When the relevant specification

does not define a force value, refer to the recommended severities shown in Table 1.

Standard atmospheric conditions to be as specified in IEC 61300-1.
6.6 Recovery

Remove the DUT from the test apparatus and allow the DUT to recover under standard

conditions for 10 min, as defined in IEC 61300-1, unless otherwise specified in the relevant

specification.
6.7 Final examination and measurement

Unless otherwise specified, visually examine the DUT and its component parts in accordance

with IEC 61300-3-1. Check for evidence of cracking, permanent deformation or other damage

which might impair its function, and against any other pass/fail criteria specified in the

relevant specification.
7 Severity

The severity of the test is dependent upon the magnitude of the force and to a lesser extent to

the rate of application and duration at the specified load. The magnitude, rate of application

and duration at the specified load shall be given in the relevant specification. Recommended

values of the test parameters are given in Table 1.
Table 1 – Recommended severity value
Category Applied force Rate of force Duration
N N/s s
C, U, E 70 5 10
The categories are defined in IEC 61753-1.
---------------------- Page: 11 ----------------------
– 10 – IEC 61300-2-55:2017 © IEC 2017
8 Details to be specified

The following details, as applicable, shall be specified in the detail specification:

– test method used, A or B;
– sample size;
– detail specification of the DUT;
– mating structure of the DUT and the holding fixture;
– panel cut-out dimensions;
– panel thickness;
– applied force and its rate of application;
– duration of the applied force;
– item and criteria of the initial examination;
– item and criteria of the final examination;
– deviations from this document.
---------------------- Page: 12 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 11 –
Annex A
(normative)
Fixture information

The fixture cut-out information and the dimensions for SC, LC, and MPO are respectively

shown in Figure A.1 to Figure A.7 and in Table A.1 to Table A.7.

Figure A.1 shows fixture cut-out information for SC simplex adaptor and Table A.1 shows

dimensions for SC simplex adaptor.
IEC
Figure A.1 – Fixture cut-out information for SC simplex adaptor
Table A.1 – Dimensions for SC simplex adaptor
Reference Dimensions Remarks
Minimum Maximum
A 9,9 10,0
B 13,5 13,6
Fixture thickness shall be 1,0 mm to 1,1 mm.

Figure A.2 shows fixture cut-out information for SC duplex adaptor and Table A.2 shows

dimensions for SC duplex adaptor.
IEC
Figure A.2 – Fixture cut-out information for SC duplex adaptor
---------------------- Page: 13 ----------------------
– 12 – IEC 61300-2-55:2017 © IEC 2017
Table A.2 – Dimensions for SC duplex adaptor
Reference Dimensions Remarks
Minimum Maximum
C 9,9 10,0
D 26,3 26,4
Fixture thickness shall be 1,0 mm to 1,1 mm.

Figure A.3 shows fixture cut-out information for LC simplex adaptor and Table A.3 shows

dimensions for LC simplex adaptor.
IEC
Figure A.3 – Fixture cut-out information for LC simplex adaptor
Table A.3 – Dimensions for LC simplex adaptor
Reference Dimensions Remarks
Minimum Maximum
E 7,1 7,2
F 11,7 11,8
Fixture thickness shall be 1,0 mm to 1,1 mm.

Figure A.4 shows fixture cut-out information for LC duplex (square flange) adaptor and

Table A.4 shows dimensions for LC duplex (square flange) adaptor.
IEC
Figure A.4 – Fixture cut-out information for LC duplex (square flange) adaptor
Table A.4 – Dimensions for LC duplex (square flange) adaptor
Reference Dimensions Remarks
Minimum Maximum
G 13,3 13,4
H 13,3 13,4
Fixture thickness shall be 1,0 mm to 1,1 mm.
---------------------- Page: 14 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 13 –

Figure A.5 shows fixture cut-out information for LC duplex (rectangular flange) adaptor and

Table A.5 shows dimensions for LC duplex (rectangular flange) adaptor.
IEC

Figure A.5 – Fixture cut-out information for LC duplex (rectangular flange) adaptor

Table A.5 – Dimensions for LC duplex (rectangular flange) adaptor
Reference Dimensions Remarks
Minimum Maximum
I 9,9 10,0
J 13,5 13,6
Fixture thickness shall be 1,0 mm to 1,1 mm.

Figure A.6 shows fixture cut-out information for LC quad (rectangular flange) adaptor and

Table A.6 shows dimensions for LC quad (rectangular flange) adaptor.
IEC

Figure A.6 – Fixture cut-out information for LC quad (rectangular flange) adaptor

Table A.6 – Dimensions for LC quad (rectangular flange) adaptor
Reference Dimensions in millimetres Remarks
Minimum Maximum
K 26,4 26,5
L 9,9 10,0
Fixture thickness shall be 1,0 mm to 1,1 mm.
Figure A.7 shows fixture cut-out information for MPO adaptor and Table A.7 shows
dimensions for MPO adaptor.
IEC
Figure A.7 – Fixture cut-out information for MPO adaptor
---------------------- Page: 15 ----------------------
– 14 – IEC 61300-2-55:2017 © IEC 2017
Table A.7 – Dimensions for MPO adaptor
Reference Dimensions Remarks
Minimum Maximum
M 15,0 15,1
N 10,0 10,1
Fixture thickness shall be 1,0 mm to 1,1 mm.
NOTE Other adaptor configurations (duplex or quad) can also be considered.
---------------------- Page: 16 ----------------------
IEC 61300-2-55:2017 © IEC 2017 – 15 –
Bibliography

IEC 61753-1, Fibre optic interconnecting devices and passive components performance

standard – Part 1: General and guidance for performance standards
___________
---------------------- Page: 17 ----------------------
– 16 – IEC 61300-2-55:2017 © IEC 2017
SOMMAIRE

AVANT-PROPOS .................................................................................................................. 18

1 Domaine d’application ................................................................................................... 20

2 Références normatives .................................................................................................. 20

3 Termes et définitions ..................................................................................................... 20

4 Description générale ...................................................................................................... 20

5 Appareillage .................................................................................................................. 20

5.1 Méthode de chargement ....................................................................................... 20

5.1.1 Généralités .................................................................................................... 20

5.1.2 Méthode A ..................................................................................................... 21

5.1.3 Méthode B ..................................................................................................... 21

5.2 Générateur de force .............................................................................................. 22

5.3 Dynamomètre ....................................................................................................... 22

5.4 Dispositif de rétention ........................................................................................... 22

5.5 Fixation ................................................................................................................. 22

5.6 Temporisateur ....................................................................................................... 22

6 Procédure ...................................................................................................................... 23

6.1 Description générale ............................................................................................. 23

6.2 Préconditionnement .............................................................................................. 23

6.3 Examen et mesure initiaux .................................................................................... 23

6.4 Montage du DUT ................................................................................................... 23

6.5 Conditionnement ................................................................................................... 23

6.6 Rétablissement ..................................................................................................... 23

6.7 Examen et mesure finaux ...................................................................................... 23

7 Sévérité ......................................................................................................................... 23

8 Détails à spécifier .......................................................................................................... 24

Annexe A (normative) Informations relatives à la fixation ..................................................... 25

Bibliographie ................
...

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