EN 60793-1-22:2002

SLOVENSKI SIST EN 60793-1-22:2004

STANDARD
september 2004
Optična vlakna – 1-22. del: Metode merjenja in preskusni postopki - Merjenje
dolžine (IEC 60793-1-22:2001)*
Optical fibres - Part 1-22: Measurement methods and test procedures - Length
measurement (IEC 60793-1-22:2001)
ICS 33.180.10 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60793-1-22
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2002
ICS 33.180.10 Partly supersedes EN 188000:1992
English version
Optical fibres
Part 1-22: Measurement methods and test procedures –
Length measurement
(IEC 60793-1-22:2001)
Fibres optiques Lichtwellenleiter
Partie 1-22: Méthodes de mesure Teil 1-22: Messmethoden
et procédures d'essai – und Prüfverfahren –
Mesure de la longueur Längenmessung
(CEI 60793-1-22:2001) (IEC 60793-1-22:2001)
This European Standard was approved by CENELEC on 2002-03-05. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-1-22:2002 E
Foreword
The text of document 86A/687/FDIS, future edition 1 of IEC 60793-1-22, prepared by SC 86A, Fibres
and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60793-1-22 on 2002-03-05.
This European Standard supersedes subclause 2.10 (test method 105), subclause 2.11 (test method
106) and subclause 4.7 (test method 303) of EN 188000:1992.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2002-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-03-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A, B, C, D, E and ZA are normative.
Annex ZA has been added by CENELEC.
Compared to IEC 60793-1:1989 and IEC 60793-2:1992, IEC/SC 86A has adopted a revised structure
of the new IEC 60793 series: The individual measurement methods and test procedures for optical
fibres are published as "Part 1-XX"; the product standards are published as "Part 2-XX".
The general relationship between the new series of EN 60793 and the superseded European
Standards of the EN 188000 series is as follows:
EN Title supersedes
EN 60793-1-XX Optical fibres -- Part 1-XX: Measurement methods Individual subclauses of
and test procedures EN 188000:1992
EN 188100:1995
EN 60793-2-XX Optical fibres -- Part 2-XX: Product specifications
EN 188101:1995
EN 188102:1995
EN 188200:1995
EN 188201:1995
EN 188202:1995
EN 60793-1-2X consists of the following parts, under the general title: Optical fibres:
- Part 1-20: Measurement methods and test procedures – Fibre geometry
- Part 1-21: Measurement methods and test procedures – Coating geometry
- Part 1-22: Measurement methods and test procedures – Length measurement
__________
Endorsement notice
The text of the International Standard IEC 60793-1-22:2001 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60793-1-22:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60793-1-40 - Optical fibres EN 60793-1-40 -
Part 1-40: Measurement methods and
test procedures – Attenuation
1)
3)
IEC 60793-1-42 - Part 1-42: Measurement methods and EN 60793-1-42 2002
test procedures - Chromatic dispersion
1) 3)
IEC 60794-1-1 - Optical fibre cables EN 60794-1-1 2002
Part 1-1: Generic specification - General

1)
Undated reference.
2)
To be published.
3)
Valid edition at date of issue.

NORME CEI
INTERNATIONALE IEC
60793-1-22
INTERNATIONAL
Première édition
STANDARD
First edition
2001-08
Fibres optiques –
Partie 1-22:
Méthodes de mesure et procédures d'essai –
Mesure de la longueur
Optical fibres –
Part 1-22:
Measurement methods and test procedures –
Length measurement
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60793-1-22 © IEC:2001 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11
1 Scope.13
2 Normative references.13
3 Overview of method .13
3.1 Method A – Delay measuring .15
3.2 Method B – Backscattering .15
3.3 Method C – Fibre elongation .15
3.4 Method D – Mechanical length .15
3.5 Method E – Phase shift.15
3.6 Reference test method.15
4 Apparatus.15
5 Sampling and specimens .17
6 Procedure.17
7 Calculations.17
8 Results .17
9 Specification information.17
Annex A (normative) Requirements specific to method A – Delay measuring.19
Annex B (normative) Requirements specific to method B – Backscattering.29
Annex C (normative) Requirements specific to method C – Fibre elongation .43
Annex D (normative) Requirements specific to method D – Mechanical length .49
Annex E (normative) Requirements specific to method E – Phase shift .51
Figure A.1 – Time measurement of the transmitted pulse .21
Figure A.2 – Time measurement of the reflected pulse .21
Figure A.3 – Principle of fibre-length measurement.25
Figure B.1 – Block diagram of an OTDR .29
Figure B.2 – Schematic OTDR trace of a specimen (z to z ) with a section
1 0
(e.g. dead-zone fibre) of unknown length, z , preceding it and without a reflection
pulse from the fibre joint point (two-point technique (B.4.3.1)).37

60793-1-22 © IEC:2001 – 5 –
Figure B.3 – Schematic OTDR trace of specimen (z to z ) with a section (e.g. dead-
1 2
zone fibre) of unknown length, z , preceding it and with a reflection pulse from the fibre
joint point (two-point technique (B.4.3.1)) .37
Figure B.4 – Schematic trace of a specimen (0 to z ) with no section preceding it
(single-point technique (B.4.3.2)).39
Figure B.5 – Schematic OTDR trace of a specimen (z to z ) with a section (e.g. dead-
D 2
zone fibre) of known length, z , preceding it (single-point technique (B.4.3.3)).39
D
Figure C.1 – Equipment set-up for phase-shift technique (C.2.2.1).45
Figure C.2 – Equipment set-up for differential pulse-delay technique (C.2.2.2) .45
Figure E.1 – Apparatus for fibre length measurement .61
Table 1 – Measurement methods .13

60793-1-22 © IEC:2001 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
OPTICAL FIBRES –
Part 1-22: Measurement methods and test procedures –
Length measurement
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
4) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
5) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60793-1-22 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
This standard, together with the other standards in the IEC 60793-1-2X series, cancels and
replaces the first edition of IEC 60793-1-2, of which it constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
86A/687/FDIS 86A/726/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
Annexes A, B, C, D and E form an integral part of this standard.

60793-1-22 © IEC:2001 – 9 –
IEC 60793-1-2X consists of the following p
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