EN 61757-2-2:2017

Fibre optic sensors - Part 2-2: Temperature measurement - Distributed sensing

IEC 61757-2-2:2016(E) defines detail specifications for distributed temperature measurement by a fibre optic sensor, also known as fibre optic distributed temperature sensing (DTS). DTS includes the use of Raman scattering, Brillouin scattering and Rayleigh scattering effects. In addition, Raman scattering and Rayleigh scattering based measurements are performed with a single-ended fibre configuration only. Brillouin scattering based measurements are performed with a single-ended fibre or fibre loop configuration. The technique accessible from both sides at same time (e. g. Brillouin optical time domain analysis, BOTDA) is referred to here as a loop configuration. Generic specifications for fibre optic sensors are defined in IEC 61757-1:2012. This part of IEC 61757 specifies the most important DTS performance parameters and defines the procedures for their determination. In addition to the group of performance parameters, a list of additional parameters has been defined to support the definition of the measurement specifications and their associated test procedures. The definitions of these additional parameters are provided for informational purposes and should be included with the sets of performance parameters. A general test setup is defined in which all parameters can be gathered through a set of tests. The specific tests are described within the clause for each measurement parameter. This general test setup is depicted and described in Clause 4 along with a list of general information that should be documented based upon the specific DTS instrument and test setup used to measure these parameters as per IEC 61757-2-2. Annex A provides a blank performance parameter table which should be used to record the performance parameter values for a given DTS instrument and chosen optical test setup configuration. Annex B provides guidelines for optional determination of point defect effects. Keywords: fibre optic distributed temperature sensing (DTS) This publication is to be read in conjunction with IEC 61757-1:2012

Lichtwellenleitersensoren - Teil 2-2: Temperaturmessung - Ortsaufgelöste faseroptische Messung

Capteurs fibroniques - Partie 2-2: Mesure de la température - Détections réparties

IEC 61757-2-2: 2016 définit les spécifications particulières de la mesure de température répartie par un capteur à fibres optiques, également connue sous l’appellation détection de température répartie (DTS) à fibres optiques. La DTS utilise les effets des diffusions de Raman, de Brillouin et de Rayleigh. De plus, les mesures basées sur une diffusion de Raman ou de Rayleigh sont uniquement effectuées avec une configuration à fibre unique. Les mesures basées sur une diffusion de Brillouin sont effectuées avec une configuration à fibre unique ou à boucle de fibre. La technique accessible simultanément des deux extrémités [par exemple Brillouin optical time domain analysis, BOTDA (analyse à capteurs à fibres optiques répartis utilisant la diffusion Brillouin dans le domaine temporel)] est appelée ici configuration à boucle. Les spécifications génériques applicables aux capteurs à fibres optiques sont définies dans l’IEC 61757-1:2012. La présente partie de l’IEC 61757 spécifie les paramètres de performance les plus importants de la DTS et définit les procédures pour leur détermination. En plus du groupe de paramètres de performance, une liste de paramètres supplémentaires a été définie pour venir à l’appui de la définition des spécifications de mesure et de leurs procédures d’essai associées. Les définitions de ces paramètres supplémentaires sont fournies à titre d’information et il convient de les inclure dans les ensembles de paramètres de performance. Un montage d’essai général est défini et permet d’obtenir tous les paramètres par un ensemble d’essais. Les essais spécifiques sont décrits dans l’article pour chaque paramètre de mesure. Ce montage d’essai général est décrit à l’Article 4, ainsi qu’une liste d’informations générales qu’il convient de consigner en fonction de l’instrument DTS spécifique et du montage d’essai utilisé pour mesurer ces paramètres, conformément à l’IEC 61757-2-2. L’Annexe A fournit un tableau de paramètres de performance vierge dans lequel il convient de consigner les valeurs des paramètres de performance d’un instrument DTS donné et de la configuration choisie pour le montage d’essais optiques. L’Annexe B fournit des lignes directrices pour la détermination facultative des effets des défauts ponctuels. Cette Norme internationale doit être utilisée conjointement avec l’IEC 61757-1:2012. La présente version bilingue (2020-09) correspond à la version anglaise monolingue publiée en 2016-05.

Optična zaznavala - 3-1. del: Merjenje temperature - Razpršeno zaznavanje (IEC 61757-2-2:2016)

Ta del standarda IEC 61757 določa podrobne specifikacije za razpršeno merjenje temperature z optičnim zaznavalom, znanim tudi kot optično razpršeno zaznavanje (DTS). Optično razpršeno zaznavanje vključuje uporabo učinkov Ramanovega sipanja, Brillouinovega sipanja in Rayleighovega sipanja, Poleg tega se meritve na podlagi Ramanovega in Rayleighovega sipanja izvajajo samo z enojno optično konfiguracijo. Meritve na podlagi Brillouinovega sipanja se izvajajo z enojno optično konfiguracijo ali konfiguracijo optične zanke. Tehnika, dostopna z obeh strani hkrati (npr. optična analiza BOTDA), se tukaj nanaša na konfiguracijo zanke. Splošne specifikacije za optična zaznavala so določene v standardu IEC 61757-1:2012.
Ta del standarda IEC 61757 določa najpomembnejše parametre delovanja DTS in opredeljuje postopke za njihovo določevanje. Poleg skupine parametrov delovanja je opredeljen tudi seznam dodatnih parametrov za pomoč pri definiciji specifikacij merjenja in njihovih povezanih preskusnih postopkov. Definicije teh dodatnih parametrov so podane samo za informativne namene in jih je treba vključiti v sklope parametrov delovanja.
Opredeljena je splošna postavitev za preskušanje, v kateri je mogoče vse parametre zbrati prek nabora preskusov.
Posebni preskusi do opisani v točki za vsak posamezen parameter. Ta splošna postavitev za preskušanje je prikazana in opisana v točki 4 poleg seznama splošnih informacij, ki jih je treba dokumentirati na podlagi posebnega instrumenta DTS in postavitve za preskušanje, uporabljene za merjenje teh parametrov v skladu s standardom IEC 61757-2-2.
Dodatek A vsebuje prazno preglednico s parametri delovanja, ki jo je treba uporabiti za beleženje vrednosti parametrov delovanja za dani instrument DTS in izbrano konfiguracijo optične postavitve preskušanja.
Dodatek B vsebuje smernice za izbirno določevanje točkovnih učinkov napak.

General Information

• Status: Published
• Publication Date: 05-Oct-2017
• Withdrawal Date: 05-Oct-2020
• ICS: 33.180.99 - Other fibre optic equipment
• Technical Committee: CLC/SR 86C - Fibre optic systems and active devices
• Drafting Committee: IEC/SC 86C - IEC_SC_86C
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Oct-2017
• Completion Date: 06-Oct-2017
• Ref Project: SIST EN 61757-2-2:2017 - Fibre optic sensors - Part 3-1: Temperature measurement - Distributed sensing (IEC 61757-2-2:2016)

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2017
2SWLþQD]D]QDYDODGHO0HUMHQMHWHPSHUDWXUH5D]SUãHQR]D]QDYDQMH,(&

Fibre optic sensors - Part 3-1: Temperature measurement - Distributed sensing (IEC
61757-2-2:2016)
Ta slovenski standard je istoveten z: EN 61757-2-2:2017
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
33.180.99 'UXJDRSUHPD]DRSWLþQD Other fibre optic equipment
YODNQD
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61757-2-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2017
ICS 33.180.99
English Version
Fibre optic sensors -
Part 2-2: Temperature measurement -
Distributed sensing
(IEC 61757-2-2:2016)
Capteurs fibroniques -  Lichtwellenleitersensoren -
Partie 2-2: Mesure de la température - Teil 2-2: Temperaturmessung -
Détections réparties Ortsaufgelöste faseroptische Messung
(IEC 61757-2-2:2016) (IEC 61757-2-2:2016)
This European Standard was approved by CENELEC on 2016-06-16. 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, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61757-2-2:2017 E
European foreword
The text of document 86C/1323/CDV, future edition 1 of IEC 61757-2-2, 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 61757-2-2:2017.
The following dates are fixed:
• latest date by which the document has to be implemented at (dop) 2018-04-06
national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with (dow) 2020-10-06
the document have to be withdrawn

This standard is to be read in conjunction with EN 61757-1:2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61757-2-2:2016 was approved by CENELEC as a
European Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
IEC 60050 series International Electrotechnical - -
Vocabulary
IEC 61757-1 2012 Fibre optic sensors - Part 1: Generic EN 61757-1 2012
specification
IEC/TR 61931 -  Fibre optic - Terminology - -
ISO/IEC Guide 99 -  International vocabulary of metrology - - -
Basic and general concepts and
associated terms (VIM)
IEC 61757-2-2 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
colour
inside
Fibre optic sensors –
Part 2-2: Temperature measurement – Distributed sensing

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.99 ISBN 978-2-8322-3363-4

– 2 – IEC 61757-2-2:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 8
4 General test setups for measurement of performance parameters . 11
4.1 General and test setup requirements . 11
4.2 General required information to be documented . 13
5 Measurement procedures for performance parameters . 14
5.1 Temperature measurement error . 14
5.1.1 Test procedure and conditions . 14
5.1.2 Parameter calculation . 14
5.2 Spatial resolution . 16
5.2.1 Test procedure and conditions . 16
5.2.2 Parameter calculation . 17
5.3 Temperature repeatability . 17
5.3.1 Test procedure and conditions . 17
5.3.2 Parameter calculation . 18
5.3.3 Formulas . 19
5.4 Spatial temperature uncertainty . 19
5.4.1 Test procedure and conditions . 19
5.4.2 Parameter calculation . 19
5.5 Environmental temperature stability . 20
5.5.1 Test procedure and conditions . 20
5.5.2 Parameter calculation . 21
5.6 Warm-up time . 22
5.6.1 Test procedure and conditions . 22
5.6.2 Parameter calculation . 23
5.7 Attenuation range . 24
5.7.1 Test procedure and conditions . 24
5.7.2 Parameter calculation . 25
Annex A (informative) Measurement parameter performance table . 26
Annex B (informative)  Point defect effects . 28
B.1 General . 28
B.2 Point defect. 28
B.3 Test procedures and conditions . 28
Bibliography . 31

Figure 1 – Example of a temperature trace with temperature sample points. 10
Figure 2 – General test setup: single-ended . 12
Figure 3 – General test setup: loop configuration . 12
Figure 4 – Temperature measurement error calculation: step 1 . 15
Figure 5 – Temperature measurement error calculation: steps 2 through 3 . 16
Figure 6 – Temperature measurement error calculation: steps 4 through 5 . 16

IEC 61757-2-2:2016 © IEC 2016 – 3 –
Figure 7 – Spatial resolution illustration . 17
Figure 8 – Temperature repeatability calculated from Figure 4 . 18
Figure 9 – Spatial temperature uncertainty calculated from Figure 4 . 20
Figure 10 – Environmental temperature cycle (example for a DTS instrument with an
operating temperature range of 0 °C to 40 °C) . 21
Figure 11 – Environmental temperature stability parameter calculation method . 22
Figure 12 – Example illustrating calculation of warm-up time. 23
Figure B.1 – Point defect measurement (example) . 29

Table A.1 – Blank measurement parameter performance table . 26

– 4 – IEC 61757-2-2:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC SENSORS –
Part 2-2: Temperature measurement – Distributed sensing

FOREWORD
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