1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Process measurement and control devices Generalmethods and procedures forevaluating performance Part 3: Tests for
2、 the effects of influence quantitiesBS EN 61298-3:2008National forewordThis British Standard is the UK implementation of EN 61298-3:2008. It isidentical to IEC 61298-3:2008. It supersedes BS EN 61298-3:1998 which iswithdrawn.The UK participation in its preparation was entrusted by Technical Committe
3、eGEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements ofsystems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correc
4、t application. BSI 2009ISBN 978 0 580 55955 6ICS 25.040.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 October 2009Amendments issued since publicationAmd. No
5、. Date Text affectedBRITISH STANDARDBS EN 61298-3:2008EUROPEAN STANDARD EN 61298-3 NORME EUROPENNE EUROPISCHE NORM November 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Se
6、cretariat: 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 61298-3:2008 E ICS 25.040.40 Supersedes EN 61298-3:1998English version Process measurement and control devices - General methods
7、 and procedures for evaluating performance - Part 3: Tests for the effects of influence quantities (IEC 61298-3:2008) Dispositifs de mesure et de commande de processus - Mthodes et procdures gnrales dvaluation des performances - Partie 3: Essais pour la dtermination des effets des grandeurs dinfluen
8、ce (CEI 61298-3:2008) Prozessmess-, -steuer- und -regelgerte - Allgemeine Methoden und Verfahren fr die Bewertung des Betriebsverhaltens - Teil 3: Prfungen der Auswirkungen von Einflussgren (IEC 61298-3:2008) This European Standard was approved by CENELEC on 2008-11-01. CENELEC members are bound to
9、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
10、 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 statu
11、s 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, Pol
12、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61298-3:2008EN 61298-3:2008 - 2 - Foreword The text of document 65B/687/FDIS, future edition 2 of IEC 61298-3, prepared by SC 65B, Devices any particular method or procedure, not covered by this stan
13、dard, 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 be clearly identified and justified if introduced in a new standard. B
14、S EN 61298-3:200861298-3 IEC:2008 7 PROCESS MEASUREMENT AND CONTROL DEVICES GENERAL METHODS AND PROCEDURES FOR EVALUATING PERFORMANCE Part 3: Tests for the effects of influence quantities 1 Scope This part of IEC 61298 specifies general methods and procedures for conducting tests and reporting on th
15、e functional and performance characteristics of process measurement and control devices. 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 analo
16、gue 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 tests for the effects of influence quantities. 2 Normative references The following referenced documents are indis
17、pensable 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 meas
18、urements and measuring instruments (composed of Part 311, 312, 313 and 314) IEC 60050-351, International Electrotechnical Vocabulary (IEV) Part 351 : Control technology IEC 61298-1:1995, Process measurement and control devices General methods and procedures for evaluating performance Part 1: General
19、 considerations IEC 61298-2:1995, Process measurement and control devices General methods and procedures for evaluating performance Part 2: Tests under reference conditions IEC 61298-4:1995, Process measurement and control devices General methods and procedures for evaluating performance Part 4: Eva
20、luation report content IEC 60068-2-1, Environmental testing Part 2-1: Tests Test A: Cold IEC 60068-2-2, Environmental testing Part 2-2: Tests Test B: Dry heat IEC 60068-2-6, Environmental testing Part 2-6: Tests Test Fc: Vibration (sinusoidal) IEC 60068-2-30, Environmental testing Part 2-30: Tests T
21、est Db: Damp heat, cyclic (12 + 12 h cycle) IEC 60068-2-31, Environmental testing Part 2-31: Tests Test Ec: Drop and topple, primarily for equipment-type specimens BS EN 61298-3:2008 8 61298-3 IEC:2008 IEC 60654-1:1993, Operating conditions for industrial-process measurement and control equipment Pa
22、rt 1: Climatic conditions IEC 60654-2:1992, Operating conditions for industrial-process measurement and control equipment Part 2: Power IEC 60654-3:1983, Operating conditions for industrial-process measurement and control equipment Part 3: Mechanical influences IEC 61326 (all parts), Electrical equi
23、pment for measurement, control and laboratory use EMC Requirements IEC 61326-1:2005, Electrical equipment for measurement, control and laboratory use EMC Requirements Part 1: General requirements IEC 61000-4-2:2001, Electromagnetic compatibility (EMC) Part 4-2: Testing and measurement techniques Ele
24、ctrostatic discharge immunity test. Basic EMC publication IEC 61000-4-3:2002, Electromagnetic compatibility (EMC) Part 4-3: Testing and measurement techniques Radiated, radio-frequency, electromagnetic field immunity test. Basic EMC publication IEC 61000-4-4:2004, Electromagnetic compatibility (EMC)
25、 Part 4-4: Testing and measurement techniques Electrical fast transient/burst immunity test. Basic EMC publication IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) Part 4-5: Testing and measurement techniques Surge immunity test. Basic EMC publication IEC 61000-4-6:2006, Electromagnetic compa
26、tibility (EMC) Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced by radio-frequency fields IEC 61000-4-8:2001, Electromagnetic compatibility (EMC) Part 4-8: Testing and measurement techniques Power frequency magnetic field immunity test. Basic EMC publication I
27、EC 61000-4-11:2004, Electromagnetic compatibility (EMC) Part 4-11: Testing and measurement techniques Voltage dips, short interruptions and voltage variations immunity tests . Basic EMC publication 3 Terms and definitions For the purpose of this document, the following relevant terms and definitions
28、, some of them based on IEC 60050(300) or IEC 60050(351), apply. 3.1 influence quantity test parameter chosen to represent a condition representing one aspect of the environment under which a device may operate 3.2 variable quantity or condition whose value is subject to change and can usually be me
29、asured (e.g. temperature, flow rate, speed, signal, etc.) IEV 351-21-01, modified BS EN 61298-3:200861298-3 IEC:2008 9 3.3 signal physical variable, one or more parameters of which carry information about one or more variables which the signal represents IEV 351-21-51, modified 3.4 range range of va
30、lues defined by the two extreme values within which a variable can be measured within the specified accuracy IEV 351-27-11, modified 3.5 span algebraic difference between the values of the upper and lower limits of the measuring range IEV 311-03-13 3.6 unexpected event device breakdown, failure to w
31、ork, anomaly, or inadvertent damage occurring during an evaluation which requires correction by the device manufacturer 3.7 test procedure statement of the tests to be carried out, and the conditions for each test, agreed between the manufacturer, the test laboratory, and the purchaser/user before t
32、he evaluation starts 3.8 type tests a test of one or more devices made to a certain design to show that the design meets certain specifications NOTE The type tests are in principle applied only on a sample. Normally are not repeated on all the individual units of equipment made in series. 4 General
33、considerations 4.1 Criteria Unless otherwise stated, any effects of the tests described in this standard shall be assessed by determining the change in the functional and performance characteristics due to the single influence quantity applied. A test is only to be performed if it is applicable to t
34、he Device Under Test (DUT). If the specification of the DUT states limits for the influence considered, these limits shall be noted and respected. NOTE It is recommended to perform each influence test described in this standard, except if the DUT operates under an environment that excludes the influ
35、ence considered. Rates of change of influence quantities shall be sufficiently slow to ensure that no overshoot of the influence quantities occurs at any point in the DUT. Sufficient time shall be allowed for stabilization at each value or state of the influence quantity before taking readings. It m
36、ay be useful to check, by means of specific measurements of the effects, whether the influence quantities cause variations in the characteristics of the DUT other than those addressed in this part of the standard. In the case of discontinuous-output devices such as alarms, the tests shall be conduct
37、ed to establish the effects of the specified influence. BS EN 61298-3:2008 10 61298-3 IEC:2008 Only that influence quantity for which a specific test is being conducted shall be applied during a specified test. All other influences shall be maintained at the reference operating conditions. However,
38、consideration should be given to any combination of two or more influence quantities which may aggravate the operating conditions (e.g. for an electrical device, temperature and supply voltage). The limit values of influence quantities specified in this standard should be used if no other limit valu
39、es are specified by the manufacturer or by the user. Testing at these values shall be agreed by the parties and the results of tests shall be added to the report. 4.2 General procedures The procedures used for the determination of the effects of influence quantities depend on the kind of test, on th
40、e type of device and on its most significant characteristics (e.g. zero, span, etc.). The procedures should be established in accordance with the criteria given in 5.1 and 5.2 of IEC 61298-1 in order to avoid tests which are too severe. To satisfy these criteria, the DUT should be tested by assessin
41、g the effects of all the quantities which might influence the performance of the DUT; this general statement is strictly valid for performance evaluation and for type tests. For routine and sampling tests, only the influence quantity which is considered to have the most effect or is agreed between t
42、he parties should be applied. Wherever possible, all the tests shall be carried out by measurement of the change of the output of the DUT. The deviations caused by the effect of the specific influence quantity should be expressed generally as a percentage of the output span. On certain devices, it m
43、ay be more convenient to express it in terms of the input span (see 4.1.6 of IEC 61298-2). It is important that the input should be set so that the output is not limited; so in all tests, inputs corresponding to, for example, 5 % and 95 % may be used instead of 0 % and 100 %. For the same reason, te
44、sts that can produce large deviations on output (for example, supply voltage interruptions, electrical fast transients, and so on) may be executed at input levels held at a value which produces 50 % output signal. In the case of discontinuous output devices such as alarms, the tests shall be conduct
45、ed in the same way to establish the conditions at which the performance is affected, with the alarm/switching level set to 10 % above or below the nominal output. 4.3 General EMC requirements In the first edition of this standard, some EMC requirements were described with reference to IEC 61326. In
46、the meantime, IEC 61326 has been transferred into the IEC 61326 series with more detailed requirements. If a reference to this standard series is given in the following clauses, this standard series shall be applied, if applicable, and as far as the DUT is not covered by a more dedicated IEC product
47、 standard. In the latter case, the more dedicated IEC product standard shall be applied. As far as no other performance criteria are specified, the following performance criteria (conforming to the IEC 61326 series) shall be applied. Performance criteria A for continuously present disturbances (elec
48、tromagnetic field, magnetic field, HF currents induced by RF transmitters). Performance criteria B for short time transient disturbances (EDS, bursts, surges). Performance criteria C for long time transient disturbances (supply voltage interruption). BS EN 61298-3:200861298-3 IEC:2008 11 As far as n
49、o other test severity levels are specified, the test severity levels shall be at least according to Table 1 of IEC 61326-1:2005. 5 Ambient temperature effects 5.1 Criteria Sufficient time shall be allowed at each test temperature to permit thermal stabilization of the DUT before test measurements are taken (as specified in IEC 60068-2-1 and 60068-2-2). The stabilization period is a function of the DUT mass and of energy dissip
