SIST EN 61207-1:2010
(Main)Expression of performance of gas analyzers - Part 1: General (IEC 61207-1:2010)
Expression of performance of gas analyzers - Part 1: General (IEC 61207-1:2010)
This part of IEC 61207 is applicable to gas analyzers used for the determination of certain constituents in gaseous mixtures. This part of IEC 61207 specifies the terminology, definitions, requirements for statements by manufacturers and tests that are common to all gas analyzers. Other international standards in this series, for example IEC 61207-2, describe those aspects that are specific to certain types (utilizing high-temperature electrochemical sensors). This part IEC 61207 is in accordance with the general principles set out in IEC 60359 and IEC 60770. This standard is applicable to analyzers specified for permanent installation in any location (indoors or outdoors) and to such analyzers utilizing either a sample handling system or an in situ measurement technique. This standard is applicable to the complete analyzer when supplied by one manufacturer as an integral unit, comprised of all mechanical, electrical and electronic portions. It also applies to sensor units alone and electronic units alone when supplied separately or by different manufacturers. For the purposes of this standard, any regulator for mains-supplied power or any non-mains power supply, provided with the analyzer or specified by the manufacturer, is considered part of the analyzer whether it is integral with the analyzer or housed separately. Safety requirements are dealt with in IEC 61010-1. If one or more components in the sample is flammable, and air or another gas mixture containing oxygen or other oxidizing component is present, then the concentration range of the reactive components are limited to levels which are not within flammability limits. Standard range of analogue d.c. current and pneumatic signals used in process control systems are dealt with in IEC 60381-1 and IEC 60382. Specifications for values for the testing of influence quantities can be found in IEC 60654. Requirements for documentation to be supplied with instruments are dealt with in IEC 61187. Requirements for general principles concerning quantities, units and symbols are dealt with in ISO 1000. See also ISO 31-0. This part of IEC 61207 does not apply to: - accessories such as recorders, analogue-to-digital converters or data acquisition systems used in conjunction with the analyzer, except that when two or more such analyzers are combined and sold as a subsystem and a single electronic unit is supplied to provide continuous measurement of several properties, that read-out unit is considered to be part of the analyzer. Similarly, e.m.f-to-current or e.m.f-to-pressure converters which are an integral part of the analyzer are included. The object of this part of IEC 61207 is: - to specify the general aspects in the terminology and definitions related to the performance of gas analyzers used for the continuous measurement of gas composition; - to unify methods used in making and verifying statements on the functional performance of such analyzers; - to specify which tests should be performed in order to determine the functional performance and how such tests should be carried out; - to provide basic documents to support the application of standards of quality assurance within ISO 9001.
Angabe zum Betriebsverhalten von Gasanalysatoren - Teil 1: Allgemeines (IEC 61207-1:2010)
Expression des performances des analyseurs de gaz - Partie 1: Généralités (CEI 61207-1:2010)
La CEI 61207-1:2010 comprend la terminologie, les définitions, les exigences de déclarations des fabricants ainsi que les essais communs à tous les analyseurs de gaz. Elle s'applique aux analyseurs spécifiés pour installation permanente en tout emplacement (à l'intérieur comme à l'extérieur) et aux analyseurs tels que ceux utilisant soit un système de manipulation des échantillons soit une technique de mesure sur site. Elle s'applique à l'analyseur complet lorsque celui-ci est fourni par un seul fabricant en une unité intégrée comprenant toutes les parties mécaniques, électriques et électroniques. Elle s'applique également aux unités de capteur seules et unités électroniques seules lorsqu'elles sont fournies séparément ou par des fabricants différents. Cette deuxième édition annule et remplace la première édition, parue en 1994, et constitue une révision technique. Cette édition inclut les modification techniques majeures suivantes:
- toutes les références (normatives et informatives) ont été mises à jour, retirées ou ajoutées comme il convient;
- tous les termes et définitions en rapport avec la présente Norme internationale ont été mis à jour;
- toutes les références aux erreurs ont été remplacées par 'incertitude' et les définitions ont été mises à jour comme il convient.
Lorsqu'une seule valeur est appelée pour une spécification de performance, telle que l'incertitude intrinsèque, l'incertitude de linéarité ou de répétabilité, sur une étendue de mesure, cette valeur est maintenant définie comme valeur maximale plutôt qu'une moyenne ou une valeur représentative. Auparavant, ceci était indéfini. Lorsque les gaz d'étalonnage pour le zéro et le 100 % sont utilisés, il y a maintenant une exigence définie à savoir il faut que l'analyseur soit capable de répondre dans ses performances normalisées au delà de son étendue normale de mesure, afin de permettre l'enregistrement des réponses en deçà ou au-delà. Une nouvelle Annexe A a été ajouté pour donner les valeurs d'influence normalisées recommandées.
Prikaz lastnosti analizatorjev plina - 1. del: Splošno (IEC 61207-1:2010)
Ta del IEC 61207 velja za analizatorje plina, ki se uporabljajo za ugotavljanje določenih sestavin plinskih mešanic. Ta del IEC 61207 določa terminologijo, opredelitve, zahteve za izjave proizvajalcev in preskuse, skupne za vse analizatorje plinov. Drugi mednarodni standardi v tej seriji, na primer IEC 61207-2, opisujejo vidike, ki so specifični za določene vrste (ki uporabljajo elektrokemične senzorje za visoko temperaturo). Ta del IEC 61207 je v skladu s splošnimi načeli, določenimi v IEC 60359 in IEC 60770. Ta standard velja za analizatorje, namenjene stalni vgradnji na katerem koli mestu (v zaprtih prostorih ali zunaj), in analizatorje, ki uporabljajo sistem za rokovanje z vzorci ali tehniko za merjenje in situ. Ta standard velja za celoten analizator, če ga proizvajalec dobavi kot celoto, sestavljeno iz vseh mehanskih, električnih in elektronskih delov. Velja tudi za samostojne senzorske in elektronske enote, če so dobavljene posebej ali s strani različnih proizvajalcev. V tem standardu vsak regulator za omrežno napajanje ali neomrežno napajanje, ki je na voljo z analizatorjem ali ga določi proizvajalec, velja za del analizatorja, ne glede na to, ali je vgrajen v analizator ali pa se nahaja v ločenem ohišju. Varnostne zahteve obravnava IEC 61010-1. Če vzorec vsebuje eno ali več vnetljivih sestavin in je prisoten zrak ali druga plinska mešanica, ki vsebuje kisik ali drugo oksidacijsko sestavino, se koncentracijski razpon reaktivnih sestavin omeji na nevnetljive ravni. Standardni razpon analognega enosmernega toka in pnevmatski signali, ki se uporabljajo v sistemih za nadzor procesa, so obravnavani v IEC 60381-1 in IEC 60382. Specifikacije vrednosti za preskušanje vplivnih veličin so navedene v IEC 60654. Zahteve za dokumentacijo, ki jo je treba priložiti instrumentov, obravnava IEC 61187. Zahteve za splošna načela glede veličin, enot in simbolov obravnava ISO 1000. Glej tudi ISO 31-0. Ta del IEC 61207 ne velja za: - dodatke, kot so registratorji, pretvornike med analognim in digitalnim ali sisteme za pridobivanje podatkov, ki se uporabljajo v povezavi z analizatorjem, razen v primeru, ko se združita dva ali več analizatorjev in se prodajajo kot podsistem in je na voljo ena elektronska enota, ki zagotavlja neprekinjeno merjenje več lastnosti, in enota za odčitavanje velja za del analizatorja. Podobno so vključeni pretvorniki med električno poljsko jakostjo in tokom ter električno poljsko jakostjo in tlakom, ki so sestavni del analizatorja. Namen tega dela IEC 61207 je: - določiti splošne vidike pri terminologiji in opredelitvah, povezane z delovanjem analizatorjev plinov, ki se uporabljajo za neprekinjeno merjenje plinske sestave; - poenotiti metode, ki se uporabljajo pri izdelavi in preverjanju izjav o delovanju takšnih analizatorjev; - določiti preskuse in način njihove izvedbe za ugotavljanje delovanja; - zagotoviti osnovne dokumente za podporo uporabe standardov zagotavljanja kakovosti v okviru ISO 9001.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61207-1:2010
01-oktober-2010
1DGRPHãþD
SIST EN 61207-1:1998
Prikaz lastnosti analizatorjev plina - 1. del: Splošno (IEC 61207-1:2010)
Expression of performance of gas analyzers - Part 1: General (IEC 61207-1:2010)
Angabe zum Betriebsverhalten von Gasanalysatoren - Teil 1: Allgemeines (IEC 61207-
1:2010)
Expression des performances des analyseurs de gaz - Partie 1: Généralités (CEI 61207-
1:2010)
Ta slovenski standard je istoveten z: EN 61207-1:2010
ICS:
71.040.40 Kemijska analiza Chemical analysis
SIST EN 61207-1:2010 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 61207-1:2010
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SIST EN 61207-1:2010
EUROPEAN STANDARD
EN 61207-1
NORME EUROPÉENNE
July 2010
EUROPÄISCHE NORM
ICS 19.080; 71.040.40 Supersedes EN 61207-1:1994
English version
Expression of performance of gas analyzers -
Part 1: General
(IEC 61207-1:2010)
Expression des performances Angabe zum Betriebsverhalten
des analyseurs de gaz - von Gasanalysatoren -
Partie 1: Généralités Teil 1: Allgemeines
(CEI 61207-1:2010) (IEC 61207-1:2010)
This European Standard was approved by CENELEC on 2010-07-01. 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, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland 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
© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61207-1:2010 E
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SIST EN 61207-1:2010
EN 61207-1:2010 - 2 -
Foreword
The text of document 65B/741/FDIS, future edition 2 of IEC 61207-1, prepared by SC 65B, Devices &
process analysis, of IEC TC 65, Industrial-process measurement, control and automation, was submitted
to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61207-1 on 2010-07-01.
This European Standard supersedes EN 61207-1:1994.
The significant technical changes with respect to EN 61207-1:1994 are the following:
– All references (normative and informative) have been updated, deleted or added, as appropriate.
– All the terms and definitions relating to this International Standard have been updated.
– All references to “errors” have been replaced by “uncertainties” and appropriate updated definitions
applied.
– Where only one value is quoted for a performance specification, such as intrinsic uncertainty, linearity
uncertainty or repeatability throughout a measurement range, this has now been defined as the
maximum value, rather than an average or “representative” value. This was previously undefined.
– Where zero and 100 % span calibration gases are used, there is now a defined requirement that the
analyser must be able to respond within its standard performance specifications beyond its normal
measurement range, to allow for any under or over response of the instrument to be recorded.
– A new Annex A has been added giving recommended standard values of influence.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2011-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-07-01
Annex ZA has been added by CENELEC.
__________
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SIST EN 61207-1:2010
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Endorsement notice
The text of the International Standard IEC 61207-1:2010 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 61207-2 NOTE Harmonized as EN 61207-2.
IEC 61298 series NOTE Harmonized in EN 61298 series (not modified).
IEC 61326 series NOTE Harmonized in EN 61326 series (not modified).
ISO 6141 NOTE Harmonized as EN ISO 6141.
ISO 6142 NOTE Harmonized as EN ISO 6142.
ISO 6143 NOTE Harmonized as EN ISO 6143.
ISO 6144 NOTE Harmonized as EN ISO 6144.
ISO 9001 NOTE Harmonized as EN ISO 9001
ISO 16664 NOTE Harmonized as EN ISO 16664.
__________
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SIST EN 61207-1:2010
EN 61207-1:2010 - 4 -
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application 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 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 60068 Series Environmental testing EN 60068 Series
IEC 60359 2001 Electrical and electronic measurement EN 60359 2002
equipment - Expression of performance
IEC 60381-1 - Analogue signals for process control HD 452.1 -
systems -
Part 1: Direct current signals
IEC 60382 - Analogue pneumatic signal for process EN 60382 -
control systems
IEC 60654 Series Industrial-process measurement and control EN 60654 Series
equipment - Operating conditions -
IEC 60654-1 - Industrial-process measurement and control EN 60654-1 -
equipment - Operating conditions -
Part 1: Climatic conditions
IEC 60770 Series Transmitters for use in industrial-process EN 60770 Series
control systems
IEC 60770-1 - Transmitters for use in industrial-process EN 60770-1 -
control systems -
Part 1: Methods for performance evaluation
IEC 61010-1 - Safety requirements for electrical equipment EN 61010-1 -
for measurement, control and laboratory use -
Part 1: General requirements
IEC 61187 - Electrical and electronic measuring EN 61187 -
equipment - Documentation
ISO 31-0 - Quantities and units - - -
Part 0: General principles
ISO 1000 - SI units and recommendations for the use of - -
their multiples and of certain other units
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SIST EN 61207-1:2010
IEC 61207-1
®
Edition 2.0 2010-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Expression of performance of gas analyzers –
Part 1: General
Expression des performances des analyseurs de gaz –
Partie 1: Généralités
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ICS 19.080; 71.040.40 ISBN 978-2-88910-947-0
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 61207-1:2010
– 2 – 61207-1 © IEC:2010
CONTENTS
FOREWORD.4
1 Scope and object.6
2 Normative references .7
3 Terms and definitions .7
3.1 General .7
3.2 Basic terms and definitions.8
3.3 General terms and definitions of devices and operations .11
3.4 Terms and definitions on manners of expression .15
3.5 Specific terms and definitions for gas analyzers .18
4 Procedure for specification .20
4.1 Specification of values and ranges .20
4.2 Operation, storage and transport conditions .21
4.3 Performance characteristics requiring statements of rated values.21
4.4 Uncertainty limits to be stated for each specified range .22
4.4.1 General .22
4.4.2 Limits of intrinsic uncertainty .22
4.4.3 Variations .22
4.5 Other performance characteristics.23
5 Procedure for compliance testing .23
5.1 General .23
5.1.1 Compliance tests .23
5.1.2 Test instruments.23
5.1.3 Test instrument uncertainties.23
5.1.4 Influence quantities .24
5.1.5 Operational conditions.24
5.2 Calibration gases .24
5.3 Adjustments made during tests.24
5.4 Reference conditions during measurement of intrinsic uncertainty.24
5.5 Reference conditions during measurement of influence quantity.24
5.6 Testing procedures.25
5.6.1 General .25
5.6.2 Intrinsic uncertainty .25
5.6.3 Linearity uncertainty .25
5.6.4 Repeatability .26
5.6.5 Output fluctuation .26
5.6.6 Drift .27
5.6.7 Delay time, rise time and fall time.27
5.6.8 Warm-up time.28
5.6.9 Interference uncertainty.28
5.6.10 Variations .29
Annex A (informative) Recommended standard values of influence – Quantities
affecting performance from IEC 60359.31
Annex B (informative) Performance characteristics calculable from drift tests .37
Bibliography.38
Figure 1 – Rise and fall times .20
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61207-1 © IEC:2010 – 3 –
Figure 2 – Output fluctuations .26
Table A.1 – Mains supply voltage .35
Table A.2 – Mains supply frequency .35
Table A.3 – Ripple of d.c. supply .36
Table B.1 – Data: applied concentration 1 000 units .37
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPRESSION OF PERFORMANCE OF GAS ANALYZERS –
Part 1: General
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 61207-1 has been prepared by subcommittee 65B: Devices and
process analysis, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This second edition cancels and replaces the first edition published in 1994 and constitutes a
technical revision.
The significant technical changes with respect to the first edition are the following:
a) All references (normative and informative) have been updated, deleted or added, as
appropriate.
b) All the terms and definitions relating to this International Standard have been updated.
c) All references to “errors” have been replaced by “uncertainties” and appropriate updated
definitions applied.
d) Where only one value is quoted for a performance specification, such as intrinsic
uncertainty, linearity uncertainty or repeatability throughout a measurement range, this
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SIST EN 61207-1:2010
61207-1 © IEC:2010 – 5 –
has now been defined as the maximum value, rather than an average or “representative”
value. This was previously undefined.
e) Where zero and 100 % span calibration gases are used, there is now a defined
requirement that the analyser must be able to respond within its standard performance
specifications beyond its normal measurement range, to allow for any under or over
response of the instrument to be recorded.
f) A new Annex A has been added giving recommended standard values of influence.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/741/FDIS 65B/752/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.
A list of all parts of the IEC 61207 series, under the general title Expression of performance of
gas analyzers, 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.
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EXPRESSION OF PERFORMANCE OF GAS ANALYZERS –
Part 1: General
1 Scope and object
This part of IEC 61207 is applicable to gas analyzers used for the determination of certain
constituents in gaseous mixtures.
This part of IEC 61207 specifies the terminology, definitions, requirements for statements by
manufacturers and tests that are common to all gas analyzers. Other international standards
in this series, for example IEC 61207-2, describe those aspects that are specific to certain
types (utilizing high-temperature electrochemical sensors).
This part IEC 61207 is in accordance with the general principles set out in IEC 60359 and
IEC 60770.
This standard is applicable to analyzers specified for permanent installation in any location
(indoors or outdoors) and to such analyzers utilizing either a sample handling system or an in
situ measurement technique.
This standard is applicable to the complete analyzer when supplied by one manufacturer as
an integral unit, comprised of all mechanical, electrical and electronic portions. It also applies
to sensor units alone and electronic units alone when supplied separately or by different
manufacturers.
For the purposes of this standard, any regulator for mains-supplied power or any non-mains
power supply, provided with the analyzer or specified by the manufacturer, is considered part
of the analyzer whether it is integral with the analyzer or housed separately.
Safety requirements are dealt with in IEC 61010-1.
If one or more components in the sample is flammable, and air or another gas mixture
containing oxygen or other oxidizing component is present, then the concentration range of
the reactive components are limited to levels which are not within flammability limits.
Standard range of analogue d.c. current and pneumatic signals used in process control
systems are dealt with in IEC 60381-1 and IEC 60382.
Specifications for values for the testing of influence quantities can be found in IEC 60654.
Requirements for documentation to be supplied with instruments are dealt with in IEC 61187.
Requirements for general principles concerning quantities, units and symbols are dealt with in
ISO 1000. See also ISO 31-0.
This part of IEC 61207 does not apply to:
– accessories such as recorders, analogue-to-digital converters or data acquisition systems
used in conjunction with the analyzer, except that when two or more such analyzers are
combined and sold as a subsystem and a single electronic unit is supplied to provide
continuous measurement of several properties, that read-out unit is considered to be part
of the analyzer. Similarly, e.m.f-to-current or e.m.f-to-pressure converters which are an
integral part of the analyzer are included.
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SIST EN 61207-1:2010
61207-1 © IEC:2010 – 7 –
The object of this part of IEC 61207 is:
– to specify the general aspects in the terminology and definitions related to the
performance of gas analyzers used for the continuous measurement of gas composition;
– to unify methods used in making and verifying statements on the functional performance of
such analyzers;
– to specify which tests should be performed in order to determine the functional
performance and how such tests should be carried out;
– to provide basic documents to support the application of standards of quality assurance
within ISO 9001.
2 Normative references
The following referenced documents are indispensable for the application 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 60068 (all parts), Environmental testing
IEC 60359:2001, Electrical and electronic measurement equipment – Expression of
performance
IEC 60381-1, Analogue signals for process control systems – Part 1: Direct current signals
IEC 60382, Analogue pneumatic signal for process control systems
IEC 60654 (all parts), Industrial-process measurement and control equipment – Operating
conditions
IEC 60654-1, Industrial-process measurement and control equipment – Operating conditions –
Part 1: Climatic conditions
IEC 60770 (all parts), Transmitters for use in industrial-process control systems
IEC 60770-1, Transmitters for use in industrial-process control systems – Part 1: Methods for
performance evaluation
IEC 61010-1, Safety requirements for electrical equipment for measurement, control and
laboratory use – Part 1: General requirements
IEC 61187, Electrical and electronic measurement equipment – Documentation
ISO 31-0, Quantities and units – General principles
ISO 1000, SI units and recommendations for the use of their multiples and of certain other
units
3 Terms and definitions
3.1 General
For the purposes of this document, the following terms and definitions apply. The definitions
in 3.2 (excepting 3.2.17), 3.3 and 3.4 are taken from IEC 60359.
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3.2 Basic terms and definitions
3.2.1
measurand
quantity subjected to measurement, evaluated in the state assumed by the measured system
during the measurement itself
NOTE 1 The value assumed by a quantity subjected to measurement when it is not interacting with the measuring
instrument may be called unperturbed value of the quantity.
NOTE 2 The unperturbed value and its associated uncertainty can only be computed through a model of the
measured system and of the measurement interaction with the knowledge of the appropriate metrological
characteristics of the instrument that may be called instrumental load.
3.2.2
(result of a) measurement
set of values attributed to a measurand, including a value, the corresponding uncertainty and
the unit of measurement
[IEC 60050-311, 311-01-01, modified]
NOTE 1 The mid-value of the interval is called the value (see 3.2.3) of the measurand and its half-width the
uncertainty (see 3.2.4).
NOTE 2 The measurement is related to the indication (see 3.2.5) given by the instrument and to the values of
correction obtained by calibration.
NOTE 3 The interval can be considered as representing the measurand provided that it is compatible with all
other measurements of the same measurand.
NOTE 4 The width of the interval, and hence the uncertainty, can only be given with a stated level of confidence
(see 3.2.4, NOTE 1).
3.2.3
(measure-) value
mid element of the set assigned to represent the measurand
NOTE The measure-value is no more representative of the measurand than any other element of the set. It is
singled out merely for the convenience of expressing the set in the format V ± U, where V is the mid element and U
the half-width of the set, rather than by its extremes. The qualifier "measure-" is used when deemed necessary to
avoid confusion with the reading-value or the indicated value.
3.2.4
uncertainty (of measurement)
parameter, associated with the result of a measurement, that characterizes the dispersion of
the values that could reasonably be attributed to the measurand
NOTE 1 The parameter can be, for example, a standard deviation (or a given multiple of it), or a half-width of an
interval having a stated level of confidence.
NOTE 2 Uncertainty of measurement comprises, in general, many components. Some of these components can
be evaluated from the statistical distribution of the results of a series of measurements and can be characterized
by experimental standard deviations. The other components, which can also be characterized by standard
deviations, are evaluated from the assumed probability distributions based on experience or other information.
[IEC 60050-311, 311-01-02, ISO/IEC Guide 99, 2.26 modified]
NOTE 3 It is understood that the result of the measurement is the best estimate of the value of the measurand,
and that all components of uncertainty, including those arising from systematic effects, such as components
associated with corrections and reference standards, contribute to the dispersion.
NOTE 4 The definition and notes 1 and 2 are from GUM, Clause B.2.18. The option used in this standard is to
express the uncertainty as the half-width of an interval with the GUM procedures with a coverage factor of 2. This
choice corresponds to the practice now adopted by many national standards laboratories. With the normal
distribution a coverage factor of 2 corresponds to a level of confidence of 95 %. Otherwise statistical elaborations
are necessary to establish the correspondence between the coverage factor and the level of confidence. As the
data for such elaborations are not always available, it is deemed preferable to state the coverage factor. This
interval can be "reasonably" assigned to describe the measurand, in the sense of the GUM definition, as in most
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SIST EN 61207-1:2010
61207-1 © IEC:2010 – 9 –
usual cases it ensures compatibility with all other results of measurements of the same measurand assigned in the
same way at a sufficiently high confidence level.
NOTE 5 Following CIPM document INC-1 and ISO/IEC Guide 98-3, the components of uncertainty that are
evaluated by statistical methods are referred to as components of category A, and those evaluated with the help of
other methods as components of category B.
3.2.5
indication or reading-value
output signal of the instrument
[IEC 60050-311, 311-01-01, modified]
NOTE 1 The indicated value can be derived from the indication by means of the calibration curve.
NOTE 2 For a material measure, the indication is its nominal or stated value.
NOTE 3 The indication depends on the outp
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