SIST EN 61757-1:2012

Fibre optic sensors - Part 1: Generic specification (IEC 61757-1:2012)

This part of IEC 61757 is a generic specification covering optical fibres, components and subassemblies as they pertain specifically to fibre optic sensing applications. It has been designed to be used as a common working and discussion tool by the vendor of components and subassemblies intended to be integrated in fibre optic sensors, as well as by designers, manufacturers and users of fibre optic sensors independent of any application or installation. The objective of this generic specification is to define, classify and provide the framework for specifying fibre optic sensors, and their specific components and subassemblies. The requirements of this standard apply to all related sectional, family, and detail specifications. Sectional specifications will contain requirements specific to sensors for particular quantities subject to measurement. Within each sectional specification, family and detail specifications contain requirements for a particular style or variant of a fibre optic sensor of that sectional specification. A fibre optic sensor contains an optical or optically powered sensing element in which the information is created by reaction of light to a measurand. The sensing element can be the fibre itself or an optically powered element inserted along the optical path. In a fibre optic sensor, one or more light parameters are directly or indirectly modified by the measurand somewhere in the optical path, contrary to an optical data link where the information is merely transmitted from the transmitter to the receiver. Generic tests or measurement methods are defined for specified attributes. Where possible, these definitions are by reference to an IEC standard - otherwise the test or measurement method is outlined in the relevant sectional, family and/or detail specification. Annex A gives examples of fibre optic sensors to better illustrate the classification scheme. The examples given are illustrative only and are not limitative, nor do they constitute a recommendation or endorsement of a particular transduction principle.

LWL-Sensoren - Teil 1: Fachgrundspezifikation (IEC 61757-1:2012)

Capteurs a fibres optiques - Partie 1: Spécification générique (CEI 61757-1:2012)

La CEI 61757-1:2012 est une spécification générique qui traite des fibres optiques, des composants et des sous-ensembles intervenant de manière spécifique dans des applications de capteurs à fibres optiques. Elle a été conçue pour être utilisée comme un outil de travail et un support de discussion par les vendeurs de composants et de sous-ensembles destinés à être intégrés à des capteurs à fibres optiques, ainsi que par les concepteurs, les fabricants et les utilisateurs de capteurs à fibre optiques indépendants de toute application ou installation. La présente spécification générique a pour objectif de définir, de classer et de fournir un cadre de travail pour la spécification des capteurs à fibres optiques, de leurs composants et de leurs sous-ensembles. Les exigences de la présente Norme s'appliquent à toutes les spécifications particulières, les spécifications de famille et les spécifications intermédiaires associées. Les spécifications intermédiaires contiendront des exigences spécifiques aux capteurs pour des grandeurs particulières à mesurer. Chaque spécification intermédiaire, chaque spécification de famille et chaque spécification particulière contient des exigences pour un modèle ou une variante particulier d'un capteur à fibres optiques de cette spécification intermédiaire. La présente édition contient une mise à jour technique significative de tous les articles, toutes les définitions et toutes les références citées par rapport à l'édition précédente.

Optična zaznavala - 1. del: Rodovna specifikacija (IEC 61757-1:2012)

Ta del standarda IEC 61757 je rodovna specifikacija, ki zajema optična vlakna, sestavne dele in sklope, ki se nanašajo posebno na zaznavo v zvezi z optičnimi vlakni. Pripravljen je bil kot skupno orodje za delo in razpravo, ki bi ga uporabljali prodajalci sestavnih delov in sklopov, ki so namenjeni za vključitev v optične senzorje, ter projektanti, proizvajalci in uporabniki optičnih senzorjev ne glede na uporabo ali namestitev. Cilj te rodovne specifikacije je opredeliti, razvrstiti in zagotoviti okvir za specifikacijo optičnih senzorjev ter njihovih posebnih sestavnih delov in sklopov. Zahteve iz tega standarda se uporabljajo za vse povezane področne, skupinske in podrobne specifikacije. Področne specifikacije bodo vključevale zahteve glede senzorjev za določene količine, ki so predmet meritve. Skupinske in podrobne specifikacije v okviru vsake področne specifikacije vključujejo zahteve za določen tip ali različico optičnega senzorja iz te področne specifikacije. Optični senzor zajema optični element za zaznavanje ali element za zaznavanje z optičnimi vlakni, v katerem se informacije ustvarijo z reakcijo svetlobe na meritev. Element za zaznavanje je lahko samo vlakno ali optični element, ki se nahaja ob optični poti. V optičnem senzorju se en ali več svetlobnih parametrov neposredno ali posredno spremeni z meritvijo nekje na optični poti, kar se razlikuje od optične podatkovne povezave, kjer se informacije le prenesejo od oddajnika do sprejemnika. Za navedene lastnosti so opredeljeni splošni preskusi ali merilne metode. Kadar je to mogoče, se te definicije sklicujejo na standard IEC, sicer je preskusna ali merilna metoda opisana v ustrezni področni, skupinski in/ali podrobni specifikaciji. V Prilogi A so za boljši prikaz klasifikacijske sheme navedeni primeri optičnih senzorjev. Navedeni primeri so namenjeni le pregledu in niso izčrpni, pri čemer ne pomenijo priporočila ali odobritve posameznega transdukcijskega načela.

General Information

• Status: Withdrawn
• Publication Date: 23-Sep-2012
• Withdrawal Date: 14-Nov-2021
• ICS: 33.180.99 - Other fibre optic equipment
• Technical Committee: MOC - Mobile Communications
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 15-Nov-2021
• Due Date: 08-Dec-2021
• Completion Date: 15-Nov-2021
• Ref Project: EN 61757-1:2012 - Fibre optic sensors - Part 1: Generic specification

Relations

• Replaces: SIST EN 61757-1:2001 - Fibre optic sensors -- Part 1: Generic specification
• Effective Date: 01-Oct-2012
• Replaced By: SIST EN IEC 61757-1:2018 - Fibre optic sensors - Part 1: Generic specification (IEC 61757:2018)
• Effective Date: 23-Oct-2018
• Replaced By: SIST EN IEC 61757-1:2018 - Fibre optic sensors - Part 1: Generic specification (IEC 61757:2018)
• Effective Date: 07-Jun-2022
• Replaces: SIST EN 61757-1:2001 - Fibre optic sensors -- Part 1: Generic specification
• Effective Date: 29-Jan-2023
• Revised: SIST EN 61757-1:2001 - Fibre optic sensors -- Part 1: Generic specification
• Effective Date: 06-May-2014
• Replaces: SIST EN 61757-1:2001 - Fibre optic sensors -- Part 1: Generic specification
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61757-1:2012
01-oktober-2012
1DGRPHãþD
SIST EN 61757-1:2001
2SWLþQD]D]QDYDODGHO5RGRYQDVSHFLILNDFLMD,(&
Fibre optic sensors - Part 1: Generic specification (IEC 61757-1:2012)
LWL-Sensoren - Teil 1: Fachgrundspezifikation (IEC 61757-1:2012)
Capteurs a fibres optiques - Partie 1: Spécification générique (CEI 61757-1:2012)
Ta slovenski standard je istoveten z: EN 61757-1:2012
ICS:
33.180.99 'UXJDRSUHPD]DRSWLþQD Other fibre optic equipment
YODNQD
SIST EN 61757-1:2012 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61757-1:2012

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SIST EN 61757-1:2012

EUROPEAN STANDARD
EN 61757-1

NORME EUROPÉENNE
July 2012
EUROPÄISCHE NORM

ICS 33.180.99 Supersedes EN 61757-1:1999


English version


Fibre optic sensors -
Part 1: Generic specification
(IEC 61757-1:2012)


Capteurs a fibres optiques -  LWL-Sensoren -
Partie 1: Spécification générique Teil 1: Fachgrundspezifikation
(CEI 61757-1:2012) (IEC 61757-1:2012)





This European Standard was approved by CENELEC on 2012-06-19. 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61757-1:2012 E

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SIST EN 61757-1:2012
EN 61757-1:2012 - 2 -

Foreword
The text of document 86C/1059/FDIS, future edition 2 of IEC 61757-1, prepared by SC 86C, "Fibre optic
systems and active devices", of IEC TC 86, "Fibre optics" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN 61757-1:2012.

The following dates are fixed:
(dop) 2013-03-19
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-06-19

standards conflicting with the
document have to be withdrawn

This document supersedes EN 61757-1:1999.
EN 61757-1:2012 includes a substantial technical update of all clauses, definitions, and cited references
with respect to EN 61757-1:1999.

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.

Endorsement notice
The text of the International Standard IEC 61757-1:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60654-4 NOTE  Harmonized as EN 60654-4.
IEC 60721-1 NOTE  Harmonized as EN 60721-1.

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SIST EN 61757-1:2012
- 3 - EN 61757-1:2012
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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60050 - International Electrotechnical Vocabulary - -
(IEV)


IEC 60060-1 - High-voltage test techniques - EN 60060-1 -
Part 1: General definitions and test
requirements


IEC 60068-1 - Environmental testing - EN 60068-1 -
Part 1: General and guidance


IEC 60068-2-1 - Environmental testing - EN 60068-2-1 -
Part 2-1: Tests - Test A: Cold


IEC 60068-2-2 - Environmental testing - EN 60068-2-2 -
Part 2-2: Tests - Test B: Dry heat


IEC 60068-2-5 - Environmental testing - EN 60068-2-5 -
Part 2-5: Tests - Test Sa: Simulated solar
radiation at ground level and guidance for
solar radiation testing


IEC 60068-2-6 - Environmental testing - EN 60068-2-6 -
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)


IEC 60068-2-10 - Environmental testing - EN 60068-2-10 -
Part 2-10: Tests - Test J and guidance: Mould
growth


IEC 60068-2-11 - Basic Environmental testing procedures - EN 60068-2-11 -
Part 2: Tests - Test Ka: Salt mist


IEC 60068-2-13 - Basic Environmental testing procedures - EN 60068-2-13 -
Part 2: Tests - Test M: Low air pressure


IEC 60068-2-14 - Environmental testing - EN 60068-2-14 -
Part 2-14: Tests - Test N: Change of
temperature


IEC 60068-2-27 - Environmental testing - EN 60068-2-27 -
Part 2-27: Tests - Test Ea and guidance:
Shock


IEC 60068-2-30 - Environmental testing - EN 60068-2-30 -
Part 2-30: Tests - Test Db: Damp heat, cyclic
(12 h + 12 h cycle)


IEC 60068-2-42 - Environmental testing - EN 60068-2-42 -
Part 2-42: Tests - Test Kc: Sulphur dioxide
test for contacts and connections


IEC 60068-2-43 - Environmental testing - EN 60068-2-43 -
Part 2-43: Tests - Test Kd: Hydrogen sulphide
test for contacts and connections

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SIST EN 61757-1:2012
EN 61757-1:2012 - 4 -
Publication Year Title EN/HD Year
IEC 60068-2-78 - Environmental testing - EN 60068-2-78 -
Part 2-78: Tests - Test Cab: Damp heat,
steady state


IEC 60079-28 - Explosive atmospheres - EN 60079-28 -
Part 28: Protection of equipment and
transmission systems using optical radiation


IEC 60529 - Degrees of protection provided by enclosures EN 60529 -
(IP Code)


IEC 60695-11-5 - Fire hazard testing - EN 60695-11-5 -
Part 11-5: Test flames - Needle-flame test
method - Apparatus, confirmatory test
arrangement and guidance


IEC 60793-1-1 - Optical fibres - EN 60793-1-1 -
Part 1-1: Measurement methods and test
procedures - General and guidance


IEC 60793-1-54 - Optical fibres - EN 60793-1-54 -
Part 1-54: Measurement methods and test
procedures - Gamma irradiation


IEC 60793-2 - Optical fibres - EN 60793-2 -
Part 2: Product specifications - General


IEC 60794-1-1 - Optical fibre cables - EN 60794-1-1 -
Part 1-1: Generic specification - General


IEC 60794-1-2 - Optical fibre cables - EN 60794-1-2 -
Part 1-2: Generic specification - Basic optical
cable test procedures


IEC 60825-1 - Safety of laser products - EN 60825-1 -
Part 1: Equipment classification and
requirements


IEC 60874-1 - Fibre optic interconnecting devices and EN 60874-1 -
passive components - Connectors for optical
fibres and cables -
Part 1: Generic specification


IEC 61000-4-2 - Electromagnetic compatibility (EMC) - EN 61000-4-2 -
Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity
test


IEC 61000-4-3 - Electromagnetic compatibility (EMC) - EN 61000-4-3 -
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test


IEC 61000-4-4 - Electromagnetic compatibility (EMC) - EN 61000-4-4 -
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test


IEC 61000-4-5 - Electromagnetic compatibility (EMC) - EN 61000-4-5 -
Part 4-5: Testing and measurement
techniques - Surge immunity test


IEC 61300 Series Fibre optic interconnecting devices and EN 61300 Series
passive components - Basic test and
measurement procedures

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SIST EN 61757-1:2012
- 5 - EN 61757-1:2012
Publication Year Title EN/HD Year
IEC 61300-2-18 - Fibre optic interconnecting devices and EN 61300-2-18 -
passive components - Basic test and
measurement procedures -
Part 2-18: Tests - Dry heat - High temperature
endurance


IEC 61300-2-22 - Fibre optic interconnecting devices and EN 61300-2-22 -
passive components - Basic test and
measurement procedures -
Part 2-22: Tests - Change of temperature


IEC 61300-2-34 - Fibre optic interconnecting devices and EN 61300-2-34 -
passive components - Basic test and
measurement procedures -
Part 2-34: Tests - Resistance to solvents and
contaminating fluids of interconnecting
components and closures


IEC 61300-2-46 - Fibre optic interconnecting devices and EN 61300-2-46 -
passive components - Basic test and
measurement procedures -
Part 2-46: Tests - Damp heat cyclic


IEC 61300-3-35 - Fibre optic interconnecting devices and EN 61300-3-35 -
passive components - Basic test and
measurement procedures -
Part 3-35: Examinations and measurements -
Fibre optic connector endface visual and
automated inspection


IEC 61753 Series Fibre optic interconnecting devices and EN 61753 Series
passive components performance standard


IEC/TR 61931 - Fibre optic - Terminology - -


IEC/TR 62222 - Fire performance of communication cables - -
installed in buildings


IEC/TR 62283 - Optical fibres - Guidance for nuclear radiation - -
tests


IEC/TR 62362 - Selection of optical fibre cable specifications - -
relative to mechanical, ingress, climatic or
electromagnetic characteristics - Guidance


IEC/TR 62627-01 - Fibre optic interconnecting devices and - -
passive components -
Part 01: Fibre optic connector cleaning
methods


ISO/IEC Guide 98-3 - Uncertainty of measurement - - -
Part 3: Guide to the expression of uncertainty
in measurement (GUM:1995)


ISO/IEC Guide 99 - International vocabulary of metrology - Basic - -
and general concepts and associated terms
(VIM)

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SIST EN 61757-1:2012

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SIST EN 61757-1:2012




IEC 61757-1

®


Edition 2.0 2012-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Fibre optic sensors –

Part 1: Generic specification




Capteurs à fibres optiques –

Partie 1: Spécification générique
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX V


ICS 33.180.99 ISBN 978-2-83220-090-2



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

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SIST EN 61757-1:2012
– 2 – 61757-1 © IEC:2012
CONTENTS

FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 8
4 Quality assurance . 15
5 Test and measurement procedures . 15
5.1 General . 15
5.2 Standard conditions for testing . 16
5.3 Test and measurement equipment requirements . 16
5.4 Visual inspection . 16
5.5 Dimensions . 16
5.6 Metrological properties . 16
5.6.1 General . 16
5.6.2 Metrological parameters . 17
5.7 Optical tests . 17
5.7.1 General . 17
5.7.2 Optical power . 17
5.7.3 Nominal wavelength and appropriate spectral characteristics . 17
5.7.4 State of polarization . 17
5.7.5 Fibre connector performance . 17
5.8 Electrical tests . 18
5.8.1 General . 18
5.8.2 Parameters and test procedures . 18
5.8.3 Voltage stress . 18
5.9 Mechanical tests . 18
5.9.1 General . 18
5.9.2 Parameters and test procedures . 19
5.10 Climatic and environmental tests . 19
5.10.1 General . 19
5.10.2 Parameters and test procedures . 19
5.11 Susceptibility to ambient light . 20
5.12 Resistance to solvents and contaminating fluids . 20
6 Classification . 20
6.1 General . 20
6.2 Measurand . 20
6.2.1 Presence/absence of objects or features . 20
6.2.2 Position . 21
6.2.3 Rate of positional change . 21
6.2.4 Flow . 21
6.2.5 Temperature . 21
6.2.6 Force x directional vector . 21
6.2.7 Force per area . 22
6.2.8 Strain . 22
6.2.9 Electromagnetic quantities . 22

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SIST EN 61757-1:2012
61757-1 © IEC:2012 – 3 –
6.2.10 Ionizing and nuclear radiation . 22
6.2.11 Other physical properties of materials . 22
6.2.12 Composition and specific chemical quantities . 23
6.2.13 Particulates . 23
6.2.14 Imaging . 23
6.3 Transduction principle . 23
6.3.1 Active generation of light . 23
6.3.2 Atom-field interaction . 23
6.3.3 Coherence modulation . 23
6.3.4 Intensity modulation . 23
6.3.5 Optical spectrum modulation . 23
6.3.6 Phase modulation . 24
6.3.7 Polarization modulation . 24
6.4 Spatial distribution . 24
6.5 Interface level . 24
7 Marking, labelling, packaging . 24
7.1 Marking of component . 24
7.2 Marking of sealed package . 24
8 IEC type designation . 24
9 Safety aspects . 25
9.1 General . 25
9.2 Personal safety . 25
9.3 Safety in explosive environment . 25
10 Ordering information . 25
11 Drawings included in the sectional, family and detail specifications . 25
Annex A (informative) Examples of fibre optic sensors . 26
Bibliography . 34

Figure 1 – Fibre optic sensor configuration with a passive sensing element and
separate fibre leads for optical input and output . 14
Figure 2 – Fibre optic sensor configuration with an active sensing . 14
Figure 3 – Fibre optic sensor configuration with a passive sensing element and one
fibre lead for optical input and output; signal separation is realized by a Y-splitter . 15

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SIST EN 61757-1:2012
– 4 – 61757-1 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIBRE OPTIC SENSORS –

Part 1: Generic specification

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 61757-1 has been prepared by subcommittee 86C: Fibre optic
systems and active devices, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 1998 and constitutes a
technical revision.
This edition includes a substantial technical update of all clauses, definitions, and cited
references with respect to the previous edition.
The text of this standard is based on the following documents:
FDIS Report on voting
86C/1059/FDIS 86C/1066/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.

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SIST EN 61757-1:2012
61757-1 © IEC:2012 – 5 –
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61757 series, published under the general title Fibre optic
sensors, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
considered to be useful for the correct
that it contains colours which are
understanding of its contents. Users should therefore print this document using a
colour printer.

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SIST EN 61757-1:2012
– 6 – 61757-1 © IEC:2012
FIBRE OPTIC SENSORS –

Part 1: Generic specification



1 Scope
This part of IEC 61757 is a generic specification covering optical fibres, components and sub-
assemblies as they pertain specifically to fibre optic sensing applications. It has been
designed to be used as a common working and discussion tool by the vendor of components
and subassemblies intended to be integrated in fibre optic sensors, as well as by designers,
manufacturers and users of fibre optic sensors independent of any application or installation.
The objective of this generic specification is to define, classify and provide the framework for
specifying fibre optic sensors, and their specific components and subassemblies. The
requirements of this standard apply to all related sectional, family, and detail specifications.
Sectional specifications will contain requirements specific to sensors for particular quantities
subject to measurement. Within each sectional specification, family and detail specifications
contain requirements for a particular style or variant of a fibre optic sensor of that sectional
specification.
A fibre optic sensor contains an optical or optically powered sensing element in which the
information is created by reaction of light to a measurand. The sensing element can be the
fibre itself or an optically powered element inserted along the optical path. In a fibre optic
sensor, one or more light parameters are directly or indirectly modified by the measurand
somewhere in the optical path, contrary to an optical data link where the information is merely
transmitted from the transmitter to the receiver.
Generic tests or measurement methods are defined for specified attributes. Where possible,
these definitions are by reference to an IEC standard – otherwise the test or measurement
method is outlined in the relevant sectional, family and/or detail specification.
Annex A gives examples of fibre optic sensors to better illustrate the classification scheme.
The examples given are illustrative only and are not limitative, nor do they constitute a
recommendation or endorsement of a particular transduction principle.
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 60050, International Electrotechnical Vocabulary
IEC 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements
IEC 60068-1 Environmental testing – Part 1: General and guidance
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat

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SIST EN 61757-1:2012
61757-1 © IEC:2012 – 7 –
IEC 60068-2-5, Environmental testing – Part 2-5: Tests – Test Sa: Simulated solar radiation at
ground level and guidance for solar radiation testing
IEC 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-10, Environmental testing – Part 2-10: Tests – Test J and guidance: Mould
growth
IEC 60068-2-11, Basic environmental testing procedures – Part 2-11: Tests – Test Ka: Salt
mist
IEC 60068-2-13, Basic environmental testing procedures – Part 2-13: Tests – Test M: Low air
pressure
...