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BRITISH STANDARD BS EN 291041993 ISO 91041991 Incorporating Amendment No. 1 Measurement of fluid flow in closed conduits s of uating the perance of electromagnetic flow-meters for liquids The European Standard EN 291041993 has the status of a British Standard UDC 532.57.082.74532.542 CONFIRMED JANUARY 2008 Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI BS EN 291041993 This British Standard, having been prepared under the direction of the Industrial-process Measurement and Control Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 31 October 1991 BSI 12-1999 The following BSI references relate to the work on this standard Committee reference PCL/2 Draft for comment 89/25907 DC ISBN 0 580 20143 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Industrial-process Measurement and Control Standards Policy Committee PCL/- to Technical Committee PCL/2, upon which the following bodies were represented British Compressed Air Society British Gas plc Department of Energy Gas and Oil Measurement Branch Department of Trade and Industry National Engineering Laboratory Electricity Industry in United Kingdom Energy Industries Council GAMBICA BEAMA Ltd. Institute of Measurement and Control Institute of Petroleum Institute of Trading Standards Administration Institution of Mechanical Engineers Society of British Gas Industries Water Services Association of England and Wales The following bodies were also represented in the drafting of the standard, through subcommittees and panels Engineering Equipment and Materials Users Association United Kingdom Atomic Energy Authority Water Research Centre Amendments issued since publication Amd. No.DateComments 7980October 1993Indicated by a sideline in the margin Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI 标准分享网 w w w .b z f x w .c o m 免费下载 w w w . b z f x w . c o m BS EN 291041993 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 291043 Publications referred toInside back cover Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI w w w . b z f x w . c o m BS EN 291041993 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Industrial-process Measurement and Control Standards Policy Committee. It is identical with ISO 91041991 “Measurement of fluid flow in closed conduits s ofuating theperanceofelectromagneticflow-meters forliquids”, published by the International Organization for Standardization ISO. In 1993 the European Committee for Standardization CEN accepted ISO 91041991 as European Standard EN 291041993. As a consequence of implementing the European Standard this British Standard is renumbered as BS EN 29104 and any reference to BS 75261991 should be read as a reference to BS EN 29104. Cross-references International StandardCorresponding British Standard ISO 39661977BS 1042 Measurement of fluid flow in closed conduits Section 2.11983 using Pitot static tubes Identical ISO 40061991BS 58751991 Glossary of terms and symbols for measurement of fluid flow in closed conduits Identical BS 41851980BS 6199 Measurement of liquid flow in closed conduits using weighing and volumetric s Part 11981 Weighing Identical ISO 51681978aBS 58441980 s of measurement of fluid flow estimation of uncertainty of a flow-rate measurement Identical BS 7118 Measurement of fluid flow assessment of uncertainty in the calibration and use of flow measurement devices ISO 7066-11989Part 11990 Linear calibration relationships Identical ISO 7066-21988Part 21989 Non-linear calibration relationships Identical ISO 83161987BS 6199 Measurement of liquid flow in closed conduits using weighing and volumetric s Part 21988 for measurement by collection of the liquid in a volumetric tank Identical IEC 68BS 2011 Environmental testing IEC 68-2-31969Part 2.1Ca1977 Test Ca. Damp heat, steady state Identical IEC 68-2-41960b IEC 68-2-61982Part 2.1Fc1983 Test Fc. Vibration sinusoidal Identical IEC 68-2-271972Part 2.1Ea1988 Test Ea. Shock Identical IEC 7701984BS 45091985 s for uating the perance of transmitters for use in industrial-process control systems Identical aReference in the text to ISO 5168 is to the revision currently in preparation. It is envisaged that, when the revised edition of ISO 5168 is published, a revised edition of BS 5844 will be published. bIEC 68-2-41960 has now been replaced by IEC 68-2-301980. BS 2011 “Environmental testing Part 2.1Db1981 Test Db and guidance Damp heat, cyclic 12 12 hour cycle” is identical with IEC 68-2-301980. Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI 标准分享网 w w w .b z f x w .c o m 免费下载 w w w . b z f x w . c o m BS EN 291041993 BSI 12-1999iii The Technical Committee has reviewed the provisions of ISO 6817 and IEC 160, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. There are no related British Standards to these standards. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN title page, pages 2 to 20, an inside back cover and a back cover. This standard has been updated see copyright date and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI w w w . b z f x w . c o m iv blank Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI 标准分享网 w w w .b z f x w .c o m 免费下载 w w w . b z f x w . c o m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 29104 June 1993 UDC 532.57.082.74532.542 Descriptors Liquid flow, pipe flow, flow measurement, electromagnetic equipment, flowmeters, tests, perance tests English version Measurement of fluid flow in closed conduits s of uating the perance of electromagnetic flow-meters for liquids ISO 91041991 Mesure de dbit des fluides dans les conduites fermes es d’valuation de la perance des dbitmtres lectromagntiques utiliss pour les liquides ISO 91041991 Durchflumessung von Fluiden in geschlossenen Leitungen Verfahren zur Beurteilung des Betriebsverhaltens von magnetisch-induktiven Durchflumegerten fr Flssigkeiten ISO 91041991 This European Standard was approved by CEN on 1993-06-18. CEN members are bound to 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 Secretariat or to any CEN member. The European Standard exists in three official versions English, French, German. A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 291041993 E Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 291041993 2 BSI 12-1999 Foreword In 1991, ISO 91041991 Measurement of fluid flow in closed conduits s of uating the perance of electromagnetic flow-meters for liquids was ted to the CEN Primary Questionnaire procedure. Following Resolution BT C 42/1992, ISO 91041991 was ted to the al vote; the result was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 1993, and conflicting national standards shall be withdrawn at the latest by December 1993. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTEThe European references to international publications are given in Annex ZA normative. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions4 4General testing procedure4 5uation of the effect of an influence quality8 6Tests for the uation of the effects of other influence quantities16 Annex A inative Bibliography19 Annex ZA normative Normative references to international publications with their relevant European publications20 Figure 1 Sample calibration showing distribution of test points8 Figure 2 Typical circuit arrangements for upstream gate valve tests9 Figure 3 Examples showing the effect of an upstream gate valve on three electromagnetic meters of DN 500 based on real data11 Figure 4 Annular or segmental obstructions used to determine the effects of a disturbance in the inlet flow on the response of the flow-meter13 Figure 5 General test circuit14 Figure 6 Test of the effect of a mains frequency common-mode voltage voltage applied between the earth of the primary and secondary devices and b mains frequency voltage between neutral and primary earth voltage applied between earth and mains, if practicable15 Figure 7 Test of the effect of mains frequency voltage between earth and output terminals16 Figure 8 Test of the effect of a.c. currents on earthed connection between primary and secondary devices17 Figure 9 Test of the effect of series-mode signals at the supply frequency18 Figure 10 Test of the effect of stray currents within the liquid18 Table 16 Table 27 Table 37 Table 412 Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI 标准分享网 w w w .b z f x w .c o m 免费下载 w w w . b z f x w . c o m EN 291041993 BSI 12-19993 Introduction The s of uation specified in this International Standard are intended for use by manufacturers to determine the perance of their products and by users or independent testing establishments to verify manufacturer’s perance specifications and to demonstrate suitability of application. The test conditions specified in this International Standard, for example the range of ambient temperatures and thepower supply,represent those which commonly arise during use. Consequently, the values specified herein should be used where no other values are specified by the manufacturer. The tests specified in this International Standard are not necessarily sufficient for instruments specifically designed for unusually arduous duties. Conversely, a restricted series of tests may be suitable for instruments designed to per within a limited range of conditions. 1 Scope 1.1 This International Standard recommends s of test for the uation of the perance of electromagnetic flow-meters for liquids flowing in closed conduits. It specifies a uni procedure to verify the perance characteristics when the flow-meter is subjected to identified influence quantities and s of representing the results of perance measurements. NOTE 1When a full uation in accordance with this International Standard is not required, those tests which are required should be pered and the results reported in accordance with those parts of this International Standard which are relevant. 1.2 This International Standard applies only to industrialized pipe-mounted electromagnetic flow-meters. It is not applicable to insertion-type flow-meters, liquid-metal flow-meters and medical flow-meters, although some of the tests described may be applied to such instruments if agreed to between the manufacturer and the user or uating body. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 39661977, Measurement of fluid flow in closed conduits Velocity area using Pitot static tubes. ISO 40061991, Measurement of fluid flow in closed conduits Vocabulary and symbols. ISO 41851980,Measurement ofliquidflow inclosed conduits Weighing . ISO 5168, Measurement of fluid flow uation of uncertainties1. ISO 6817, Measurement of conductive liquid flow in closed conduits using electromagnetic flow-meters2. ISO 7066-11989, Assessment of uncertainty in the calibration and use of flow measurement devices Part 1 Linear calibration relationships. ISO 7066-21988, Assessment of uncertainty in the calibration and use of flow measurement devices Part 2 Non-linear calibration relationships. ISO 83161987,Measurement ofliquidflow inclosed conduits by collection of the liquid in a volumetric tank. IEC 68-2-31969, Basic environmental testing procedures Test Ca Damp heat, steady state. IEC 68-2-41960, Basic environmental testing procedures Test D Accelerated damp heat. IEC 68-2-61982, Basic environmental testing procedures Test Fc and guidance Vibration sinusoidal. IEC 68-2-271972, Basic environmental testing procedures Test Ea Shock. 1To be published. Revision of ISO 51681978 2To be published. Revision of ISO 68171980 Licensed Copy Oxford Brookes ATHENS, Oxford Brookes University, 10/09/2010 1404, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 291041993 4 BSI 12-1
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