IEC 60534-9:2007

Industrial-process control valves - Part 9: Test procedure for response measurements from step inputs

It defines the testing and reporting of the step response of control valves that are used in throttling closed-loop control applications. A control valve consists of the complete, ready-to-use assembly of the control valve body, the actuator, and any required accessories. The most probable accessory is a valve positioner. It defines how to test, measure, and report control valve response characteristics in an open-loop environment. This information can be used for process control applications to determine how well and how fast the control valve responds to the control valve input signal. The contents of the corrigendum of June 2008 have been included in this copy.

Vannes de régulation des processus industriels - Partie 9: Procédure d'essai pour la mesure de la réponse des vannes de régulation à des signaux d'entrée échelonnés

Elle définit les essais et les rapports d'essai relatifs à la réponse à un échelon des vannes de régulation utilisées dans les applications de commande en boucle de régulation fermée. Une vanne de régulation consiste en un assemblage complet, prêt à l'emploi, d'un corps de vanne de régulation, d'un actionneur et de tout autre accessoire requis. L'accessoire le plus fréquent est un positionneur de vanne. Elle définit également comment réaliser les essais, les mesures et le rapport relatifs aux caractéristiques de la réponse des vannes de régulation dans un environnement en boucle ouverte. Cette information peut être utilisée pour des applications de commande de processus afin de déterminer comment et avec quelle rapidité la vanne de régulation répond au signal d'entrée de commande de la vanne. Le contenu du corrigendum de juin 2008 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 09-Sep-2007
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 23.060.40 - Pressure regulators
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: SC 65B - Measurement and control devices
• Drafting Committee: WG 9 - TC 65/SC 65B/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 30-Sep-2007
• Completion Date: 10-Sep-2007

Relations

• Corrected By: IEC 60534-9:2007/COR1:2008 - Corrigendum 1 - Industrial-process control valves - Part 9: Test procedure for response measurements from step inputs
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60534-9
Edition 1.0 2007-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 9: Test procedure for response measurements from step inputs

Vannes de régulation des processus industriels –
Partie 9: Procédure d’essai pour la mesure de la réponse des vannes de
régulation à des signaux d’entrée échelonnés

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IEC 60534-9
Edition 1.0 2007-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial-process control valves –
Part 9: Test procedure for response measurements from step inputs

Vannes de régulation des processus industriels –
Partie 9: Procédure d’essai pour la mesure de la réponse des vannes de
régulation à des signaux d’entrée échelonnés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 23.060; 25.040.40 ISBN 2-8318-9280-5

– 2 – 60534-9 © IEC:2007
CONTENTS
FOREWORD.3

1 Scope and object.5
2 Normative references .5
3 Terms and definitions.5
4 Symbols .10
5 General test procedures .11
5.1 Test valve conditions.11
5.2 Test system.11
5.3 Measuring instruments .11
5.4 Process variable.12
5.5 Nominal test position.13
6 Examples of step response.13
7 Tests specified for each of three test environments .15
7.1 Bench tests .15
7.2 Laboratory tests .16
7.3 In-process tests.16
8 Detailed test procedures.17
8.1 Baseline test .17
8.2 Small-step test .18
8.3 Response-time tests.19
9 Presentation of test results.21
9.1 General information.21
9.2 Test results .22
9.2.1 Baseline test.22
9.2.2 Small-step test .22
9.2.3 Response-time tests.22

Annex A (informative) Sliding friction measurement .24

Bibliography.26

Figure 1 – Dead band and resolution .6
Figure 2 – Typical step change and response without overshoot.14
Figure 3 – Step response with some overshoot.15
Figure 4 – Example step and response during baseline test.18
Figure 5 – Signal sequence for small-step test.19
Figure 6 – Sample signal step sequence for response time tests .20
Figure 7 – Sample data from small-step test (Δs = 0,13 %) performed in a process loop .23
Figure 8 – Sample plot showing step response, t , versus step size for four different
valves .23

60534-9 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 9: Test procedure for response measurements from step inputs

FOREWORD
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International Standard IEC 60534-9 has been prepared by subcommittee 65B: Devices, of IEC
technical committee 65: Industrial-process measurement and control.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/632/FDIS 65B/639/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.

– 4 – 60534-9 © IEC:2007
The list of all the parts of the IEC 60634 series, under the general title Industrial-process
control valves, 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.
The contents of the corrigendum of June 2008 have been included in this copy.

60534-9 © IEC:2007 – 5 –
INDUSTRIAL-PROCESS CONTROL VALVES –

Part 9: Test procedure for response measurements from step inputs

1 Scope and object
This part of IEC 60534 defines the testing and reporting of the step response of control valves
that are used in throttling closed-loop control applications. A control valve consists of the
complete, read
...