1、IEC61298-2Edition 2.0 2008-10INTERNATIONALSTANDARDb上NORMEINTERNATIONALEProcess measurement and control devices-General methods and proceduresfor evaluating performance-Part 2:Tests under reference conditionsDispositifs de mesure et de commande de processus-Methodes et proceduresgenerales devaluation
2、 des performances-Partie 2:Essais dans les conditions de reference北4码行开ys9特与wng6T05何1mP.8u40的d上子海面州a上INTERNATIONALELECTROTECHNICALCOMMISSIONCOMMISSIONELECTROTECHNIQUEINTERNATIONALEPRICE CODECODE PRIXU1CS25.040.401SBN2-8318-1003-1-261298-21EC:200882S85CONTENTSFOREWORD.44INTRODUCTION.61Scope.72Normati
3、ve references.73Terms and definitions.74 Accuracy related factors.104.1 Test procedures and precautions.104.1.1 Selection of ranges for test.104.1.2 Preconditioning cycles.114.1.3 Number of measurement cycles and test points.114.1.4 Additional tests where digital inputs and outputs are provided.114.
4、1.5 Measurement procedure.114.1.6 Processing of the measured values.124.1.7 Determination of accuracy related factors.124.1.8 Presentation of the results.164.2Specific testing procedures and precautions for the determination of deadband.164.2.1Selection of ranges for test and preconditioning164.2.2
5、Measurement procedure.164.2.3Presentation of the results.5Dynamic behaviour.175.1 General considerations.115.2General testing procedures and precautions.175.3 Frequency response.175.4 Step response.,186Functional characteristic.186.1 General.186.2Input resistance of an electrical device186.3 Insulat
6、ion of electrical devices.216.3.1 General considerations.216.3.2 Insulation resistance.216.3.3 Dielectric strength.226.4 Power consumption.226.4.1 Electrical power consumption.226.4.2 Air consumption.226.5 Output ripple of a device with an electrical d.c.output.236.6 Air flow characteristics of a pn
7、eumatic device236.6.1 Initial setting up.236.6.2 Delivered flow Q.236.6.3 Exhausted flow Q2.246.6.4Data presentation.246.7Limits of adjustments of lower range value and span.256.8Switching differential.25257.1 Start-up drift257.2 Long-term drift25Not tor R年sa61298-21EC:2008-3Figure 1-Erfor curvesFig
8、ure 2-Two examples of frequencyFigure 3-Two examples of responses to a step input.20Figure 4-Test set-up for input resistance.21Figure 5-Test arrangement for measurement of airflow characteristics.23Figure 6-Typical air flow characteristics.24Table 1-Settings of span and lower range value adjustment
9、s.11Table 2-Number of measurement cyclesand number and location of test points.12Table 3-Typical table of device errors.14Table 4-Dielectric strength test voltages4.22No reproducsan or networking permied without license from IHSNeer风sa-4-61298-21EC:2008INTERNATIONAL ELECTROTECHNICAL COMMISSIONPROCES
10、S MEASUREMENT AND CONTROL DEVICES-GENERAL METHODS AND PROCEDURESFOR EVALUATING PERFORMANCE-Part 2:Tests under reference conditionsFOREWORD1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprisingall national electrotechnical committees(IEC Nationa
11、l Committees).The object of IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields.Tothis end and in addition to other activities,IEC publishes International Standards,Technical Specifications.Technical Reports,Publicly Availab
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14、early as possible,an internationalconsensus of opinion on the relevant subjects since each technical committee has representation from allinterested IEC National Committees.3)IEC Publications have the form of recommendations for international use and are accepted by IEC NationalCommittees in that se
15、nse.While all reasonable efforts are made to ensure that the technical content of IECPublications is accurate.IEC cannot be held responsible for the way in which they are used or for anymisinterpretation by any end user.4)In order to promote international uniformity.IEC National Committees undertake
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17、its approval and cannot be rendered responsible for anyequipment 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
18、experts andmembers of its technical committees and IEC National Committees for any personal injury.property damage orother damage of any nature whatsoever.whether direct or indirect.or for costs(including legal fees)andexpenses arising out of the publication.use of,or reliance upon,this IEC Publicat
19、ion or any other IECPublications.8)Attention is drawn to the Normative references cited in this publication.Use of the referenced publications isindispensable for the correct application of this publication.9)Attention is drawn to the possibility that some of the elements of this IEC Publication may
20、 be the subject ofpatent rights.IEC shall not be held responsible for identifying any or all such patent rights.International Standard IEC 61298-2 has been prepared by subcommittee 65B:Devices andprocess analysis,of IEC technical committee 65:Industrial-process measurement,control andautomation.This
21、 second edition cancels and replaces the first edition published in 1995 and constitutes atechnical revisionThis edition is a general revision with respect to the previous edition and does not include anysignificant changes(see Introduction).Not for Ressie61298-21EC:2008-5The text of this standard i
22、s based on the following documents:FDISReport on voting65B/686/FD1S65B/694/RVDFull information on the voting for the approval of this standard can be found in the report onvoting indicated in the above table.This publication has been drafted in accordance with the ISO/IEC Directives,Part 2.A list of
23、 all parts of the IEC 61298 series,under the general title Process measurement andcontrol devices-General methods and procedures for evaluating performance,can be foundon the IEC website.The committee has decided that the contents of this publication will remain unchanged untilthe maintenance result date indicated on the IEC web site under http:/webstore.iec.chinthe data related to the specific publication.At this date,the publication will bereconfirmed.withdrawn,replaced by a revised edition,oramendedNof for Resaie
