SIST EN 61298-1:2009

SLOVENSKI STANDARD
01-september-2009
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Process measurement and control devices - General methods and procedures for
evaluating performance -- Part 1: General considerations
Prozessmess-, -steuer- und -regelgeräte – Allgemeine Methoden und Verfahren für die
Bewertung des Betriebsverhaltens – Teil 1: Allgemeine Betrachtungen
Dispositifs de mesure et de commande de processus - Méthodes et procédures
générales d'évaluation des performances -- Partie 1: Généralités
Ta slovenski standard je istoveten z: EN 61298-1:2008
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61298-1
NORME EUROPÉENNE
November 2008
EUROPÄISCHE NORM
ICS 25.040.40 Supersedes EN 61298-1:1995

English version
Process measurement and control devices -
General methods and procedures for evaluating performance -
Part 1: General considerations
(IEC 61298-1:2008)
Dispositifs de mesure  Prozessmess-, -steuer- und -regelgeräte -
et de commande de processus - Allgemeine Methoden und Verfahren für
Méthodes et procédures générales die Bewertung des Betriebsverhaltens -
d'évaluation des performances - Teil 1: Allgemeine Betrachtungen
Partie 1: Généralités (IEC 61298-1:2008)
(CEI 61298-1:2008)
This European Standard was approved by CENELEC on 2008-11-01. 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61298-1:2008 E
Foreword
The text of document 65B/685/FDIS, future edition 2 of IEC 61298-1, 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 61298-1 on 2008-11-01.
This European Standard supersedes EN 61298-1:1995.
significant changes (see Introduction).
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) 2009-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-11-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61298-1:2008 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61298-1:2008
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

1)
IEC 60050-300 - International Electrotechnical Vocabulary - -
(IEV) - Electrical and electronic
measurements and measuring instruments -
Part 311: General terms relating to
measurements -
Part 312: General terms relating to electrical
measurements -
Part 313: Types of electrical measuring
instruments -
Part 314: Specific terms according to the type
of instrument
1)
IEC 60050-351 - International Electrotechnical Vocabulary - -
(IEV) -
Part 351: Control technology
IEC 60410 1973 Sampling plans and procedures - -
for inspection by attributes
1) 2)
IEC 61298-2 - Process measurement and control devices - EN 61298-2 2008
General methods and procedures for
evaluating performance -
Part 2: Tests under reference conditions

1) 2)
IEC 61298-4 - Process measurement and control devices - EN 61298-4 2008
General methods and procedures for
evaluating performance -
Part 4: Evaluation report content

ISO 31 Series Quantities and units - -

1)
Undated reference.
2)
Valid edition at date of issue.

IEC 61298-1
Edition 2.0 2008-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Process measurement and control devices – General methods and procedures
for evaluating performance –
Part 1: General considerations

Dispositifs de mesure et de commande de processus – Méthodes et procédures
générales d'évaluation des performances –
Partie 1: Généralités
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
Q
CODE PRIX
ICS 25.040.40 ISBN 2-8318-1003-0
– 2 – 61298-1 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .7
4 Test categories.9
5 General criteria .9
5.1 Realistic operating conditions.9
5.2 Economic aspects .10
5.3 Replication of the tests and comparability of the results .10
5.3.1 Standardization of test methods .10
5.3.2 Influence factors.10
5.3.3 Documentation of the test methods.10
5.4 Processing the results .10
5.5 Independence of the results of a test from the effects of other tests .10
6 General conditions for tests and samples .11
6.1 Environmental test conditions.11
6.1.1 Recommended limits of ambient conditions for test measurements.11
6.2 Supply conditions .11
6.2.1 Reference values.11
6.2.2 Tolerances .11
6.3 Load conditions .12
6.4 Mounting position .12
6.5 Externally induced vibrations.12
6.6 External mechanical constraints .12
6.7 Selection .13
6.7.1 Criteria .13
6.7.2 Selection procedures.13
6.8 Delivery of the devices .13
6.9 Identification and inspection .13
7 General testing procedures and precautions.13
7.1 Test laboratory .13
7.2 Preparation for the tests .14
7.3 Choice of reference measuring equipment.14
7.3.1 Criteria .14
7.3.2 Uncertainty of the measuring system .14
7.3.3 Traceability.14
7.4 Input variable quality .14
7.5 Tapping.15
7.6 Checking of calibration made as delivered.15
7.7 Sequence of tests .15
7.8 Interruption and duration of each series of measurements.15
7.9 Anomalies and failures during tests .15
7.9.1 General .15
7.9.2 Procedures.15
7.10 Re-start of a test .15

61298-1 © IEC:2008 – 3 –
7.11 Setting of adjustments.16
7.12 Preconditioning .16
7.12.1 Criteria .16
7.12.2 Procedure.16
7.13 Calibration adjustments of lower range value and span .16
7.14 Constancy of the operating conditions and settings .16
7.15 Input/output variable relationships .16
7.15.1 Criteria .16
7.15.2 Procedure.16
7.16 Error assessment .17
7.17 Symbols and units of measurement .17
7.18 Test report and documentation .17

– 4 – 61298-1 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PROCESS MEASUREMENT AND CONTROL DEVICES –
GENERAL METHODS AND PROCEDURES FOR
EVALUATING PERFORMANCE –
Part 1: General considerations

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61298-1 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 1995 and constitutes a
technical revision.
This edition is a general revision with respect to the previous edition and does not include any
significant changes (see Introduction).

61298-1 © IEC:2008 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
65B/685/FDIS 65B/693/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 61298 series, under the general title Process measurement and
control devices – General methods and procedures for evaluating performance, can be found
on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
– 6 – 61298-1 © IEC:2008
INTRODUCTION
This standard is not intended as a substitute for existing standards, but is rather intended as a
reference document for any future standards developed within the IEC or other standards
organizations, concerning the evaluation of process instrumentation. Any revision of existing
standards should take this standard into account.
This common standardized basis should be utilized for the preparation of future relevant
standards, as follows:
– any test method or procedure, already treated in this standard, should be specified and
described in the new standard by referring to the corresponding clause of this standard.
Consequently new editions of this standard are revised without any change in numbering
and scope of each clause;
– any particular method or procedure, not covered by this standard, should be developed
and specified in the new standard in accordance with the criteria, as far as they are
applicable, stated in this standard;
– any conceptual or significant deviation from the content of this standard, should clearly be
identified and justified if introduced in a new standard.

61298-1 © IEC:2008 – 7 –
PROCESS MEASUREMENT AND CONTROL DEVICES –
GENERAL METHODS AND PROCEDURES FOR
EVALUATING PERFORMANCE –
Part 1: General considerations

1 Scope
This part of IEC 61298 specifies general methods and procedures for conducting tests, and
reporting on the functional and performance characteristics of process measurement and
control devices. The methods and procedures specified in this standard are applicable to any
type of process measurement and control device. The tests are applicable to any such
devices characterized by their own specific input and output variables, and by the specific
relationship (transfer function) between the inputs and outputs, and include analogue and
digital devices. For devices that require special tests, this standard should be used, together
with any product specific standard specifying special tests.
This standard covers general principles which apply to the series.
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 60050-300, International Electrotechnical Vocabulary (IEV) – Electrical and electronic
measurements and measuring instruments (composed of Part 311, 312, 313 and 314)
IEC 60050-351, International Electrotechnical Vocabulary (IEV) – Part 351: Control
technology
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 61298-4, Process measurement and control devices – General methods and procedures
for evaluating performance – Part 4: Evaluation report content
IEC 61298-2, Process measurement and control devices – General methods and procedures
for evaluating performance – Part 2: Tests under reference conditions
ISO 31 (all parts), Quantities and units
3 Terms and definitions
For the purpose of this document, the following relevant terms and definitions, some of them
based on IEC 60050(300) or IEC 60050(351), apply.
3.1 variable
quantity or condition whose value is subject to change and can usually be measured (e.g.,
temperature, flow rate, speed, signal, etc.)
[IEV 351-21-01, modified]
– 8 – 61298-1 © IEC:2008
3.2
signal
physical quantity, one or more parameters of which carry information about one or more
variables which the signal represents
[IEV 351-21-51, modified]
3.3
range
range of values defined by the two extreme values, within which a variable can be measured
within the specified accuracy
[IEV 351-27-11, modified]
3.4
span
algebraic difference between the values of the upper and lower limits of the measuring range
[IEV 311-03-13]
3.5
inaccuracy
maximum positive and negative deviation from the specified characteristic curve observed in
testing a device under specified conditions and by a specified procedure
NOTE Accuracy is defined in IEC 60050-300, definition 311-06-08.
3.6
error
algebraic difference between the indicated value and a comparison value of the measured
variable
[IEV 351-27-04, modified]
NOTE The error is positive when the indicated value is greater than the comparison value. The error is generally
expressed as a percentage of the relevant ideal span.
3.7
measured error
largest positive or negative value of errors of the average upscale or downscale values at
each point of measurement
3.8
non-linearity
deviation from linearity
NOTE
...