1、 IEC 60534-9Edition 1.0 2007-09INTERNATIONAL STANDARD NORME INTERNATIONALEIndustrial-process control valves Part 9: Test procedure for response measurements from step inputs Vannes de rgulation des processus industriels Partie 9: Procdure dessai pour la mesure de la rponse des vannes de rgulation de
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16、 questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60534-9Edition 1.0 2007-09INTERNATIONAL STANDARD NORME INTERNATIONALEIndustrial-process control valves Part 9: Test procedure for response measurements from step inputs V
17、annes de rgulation des processus industriels Partie 9: Procdure dessai pour la mesure de la rponse des vannes de rgulation des signaux dentre chelonns INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE UICS 23.060; 25.040.40 PRICE CODECODE PRIXISBN 2-8318-9280-5 2 6
18、0534-9 IEC:2007 CONTENTS FOREWORD.3 1 Scope and object5 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 variable12 5.5 Nominal test position.13 6 Examples of step
19、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 tests19 9 Presentation of test results.21 9.1 General information.21 9
20、.2 Test results .22 9.2.1 Baseline test22 9.2.2 Small-step test 22 9.2.3 Response-time tests22 Annex A (informative) Sliding friction measurement .24 Bibliography26 Figure 1 Dead band and resolution 6 Figure 2 Typical step change and response without overshoot.14 Figure 3 Step response with some ove
21、rshoot.15 Figure 4 Example step and response during baseline test18 Figure 5 Signal sequence for small-step test19 Figure 6 Sample signal step sequence for response time tests 20 Figure 7 Sample data from small-step test (s = 0,13 %) performed in a process loop .23 Figure 8 Sample plot showing step
22、response, t86, 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 1) The International Electrotechnical Commission (IEC) is a worldw
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33、l 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/RVDFull information on the voting for the approv
34、al 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,
35、 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
36、 reconfirmed, withdrawn, replaced by a revised edition, or amended. 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 valve
37、s 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. NOTE For background, refer to technical report ANS
38、I/ISA-TR75.25.02 61. The object of this standard is to define 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 contro
39、l valve input signal. This standard does not define the acceptable control valve performance for process control nor does it restrict the selection of control valves for any application. If this standard is used for evaluation or acceptance testing, the parties may agree to documented variations fro
40、m these requirements. The information using the defined test methods is specifically applicable to closed-loop feedback control but may have some application to open-loop control applications. It does not address valves used in on-off control service. Tests specified in this standard may not be suff
41、icient to measure the performance required for all applications. Not all control valve applications will require this testing. 2 Normative references The following documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated refe
42、rences, the latest edition of the referenced document (including any amendments) applies. IEC 60534-1, Industrial-process control valves Part 1: Control valve terminology and general consideration IEC 60534-4, Industrial-process control valves Part 4: Inspection and routine testing 3 Terms and defin
43、itions For the purposes of this document, the following terms and definitions, as well as those given in IEC 60534-1 and other parts of IEC 60534, apply. NOTE 1 In the specific area of non-linear dynamics, it was determined that some terms defined in IEC 60050-351 or in 5 lacked the precision desire
44、d for these documents. Others were inconsistent with the terminology used in the non-linear control literature. 1Figures in square brackets refer to the Bibliography. 6 60534-9 IEC:2007 NOTE 2 Reference 6 explains applicable terms and explores control valve static and dynamic response characteristic
45、s important for process control. That information will aid correct interpretation and application of the test results obtained from the tests defined in this standard. Dynamics are not shown b Time Amplitude Output a resolution b a c d Input c dead band d IEC 1630/07 Figure 1 Dead band and resolutio
46、n 3.1 closed-loop time constant time constant of the closed-loop response of a control loop, used in tuning methods such as Internal Model Control (IMC) and Lambda Tuning and is a measure of the performance of a control loop 3.2 dead band finite range of values within reversal of the input variable
47、does not produce any noticeable change in the output variable IEC 60534-4, 3.2 3.3 dead time time interval between the instant when a variation of an input variable is produced and the instant when the consequent variation of the output variable starts 3.4 dynamic response time-dependent output sign
48、al change resulting from a defined time-dependent input signal change NOTE Commonly used input signal changes include impulse, pulse, step, ramp, and sinusoid 4. Dynamic means that the control valve is moving. Dynamic response can be measured without process loading in bench-top tests, with simulate
49、d or active loading in a flow laboratory or under normal process operating conditions. 60534-9 IEC:2007 7 3.5 gain ratio GRresponse gain GZdivided by the response gain GZ02determined from the multi-step test performed with a step size of 2 %. The ideal gain ratio equals 1,0 for tests about any nominal position GR= GZ/GZ02NOTE Measuring the gain ratio may not be possibl
