IEC 61514-2:2004

INTERNATIONAL IEC
STANDARD 61514-2
First edition
2004-01
Industrial process control systems –
Part 2:
Methods of evaluating the performance
of intelligent valve positioners
with pneumatic outputs
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to
search by a variety of criteria including text searches, technical committees
and date of publication. On-line information is also available on recently issued
publications, withdrawn and replaced publications, as well as corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/online_news/ justpub)
is also available by email. Please contact the Customer Service Centre (see
below) for further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:

Email: custserv@iec.ch
Tel: +41 22 919 02 11
Fax: +41 22 919 03 00
INTERNATIONAL IEC
STANDARD 61514-2
First edition
2004-01
Industrial process control systems –
Part 2:
Methods of evaluating the performance
of intelligent valve positioners
with pneumatic outputs
 IEC 2004  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale W
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61514-2  IEC:2004(E)
CONTENTS
FOREWORD.4

INTRODUCTION.6

1 Scope.7

2 Normative references.8

3 Terms and definitions .9

4 Design review.10

4.1 Positioner identification.10
4.1.1 Power supply unit.11
4.1.2 Sensor/input assembly.11
4.1.3 Auxiliary sensor assembly.11
4.1.4 Human interface.11
4.1.5 Communication interface.12
4.1.6 Data processing unit .12
4.1.7 Output subsystem.12
4.1.8 External functionality.13
4.2 Aspects of functionality and capabilities to be reviewed .13
4.2.1 Checklist.13
4.2.2 Reporting.19
4.3 Documentary information.19
5 Performance testing.20
5.1 Reference conditions for performance tests .20
5.1.1 Valve characteristics.21
5.2 General testing procedures.23
5.2.1 Test set-up.23
5.2.2 Testing precautions.24
5.3 Initial observations and measurements .24
5.3.1 Mounting procedure.24
5.3.2 Configuration procedures.25
5.3.3 Stem position calibration procedure .25
5.3.4 Stem position tuning procedure.25
5.4 Performance test procedures .26

5.4.1 Tests under reference conditions .26
5.4.2 Effects of influence quantities .28
6 Other considerations.34
6.1 Safety.34
6.2 Degree of protection provided by enclosures.34
6.3 Electromagnetic emission.34
6.4 Variants.34
7 Evaluation report.34

Annex A (normative) Vibration test set-up.36

Bibliography .37

61514-2  IEC:2004(E) – 3 –
Figure 1 – Positioner model in extensive configuration.11

Figure 2 – Basic design for positioners with analogue outputs.13

Figure 3 – Basic design for positioners with pulsed output .13

Figure 4 – Basic test set-up.24

Figure 5 – Examples of step responses of positioners .28

Table 1 – Single or double acting linear .21

Table 2 – Single or double acting rotary for an angle between 60° – 90° .22

Table 3 – Matrix of instrument properties and tests.29

– 4 – 61514-2  IEC:2004(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
INDUSTRIAL PROCESS CONTROL SYSTEMS –

Part 2: Methods of evaluating the performance of

intelligent valve positioners with pneumatic outputs

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 61514-2 has been prepared by subcommittee 65B: Devices, of
IEC technical committee 65: Industrial-process measurement and control.
This standard is to be read in conjunction with IEC 61514.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/515/FDIS 65B/522/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.

61514-2  IEC:2004(E) – 5 –
The committee has decided that the contents of this publication will remain unchanged until
2009. At this date, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or

• amended.
A bilingual version of this publication may be issued at a later date.

– 6 – 61514-2  IEC:2004(E)
INTRODUCTION
New instruments for process control and measurement including valve positioners are mainly

equipped with microprocessors thereby utilising digital data processing and communication

methods and/or artificial intelligence, making them more complex and giving them a consider-

able added value.
Modern intelligent valve positioners are no longer only controlling the valve position, but they

are in many cases also equipped with various facilities for self-testing, actuator/valve condition

monitoring and alarming. The variety of added functionalities is large. They can no longer be

compared with the single function "cam-type" positioners. Therefore, accuracy related

performance testing although still very important is no longer sufficient to demonstrate their
flexibility, capabilities and other features with respect to engineering, installation, maintain-
ability, reliability and operability.
In this standard the evaluation considers performance testing and a design review of both
hardware and software. The layout of this document follows to some extent the framework of
IEC 62098. A number of performance tests described in IEC 61514 are still valid for intelligent
valve positioners. Further reading of IEC 61069 is recommended.
...