ISO-9213-2004.pdf
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1、INTERNATIONAL STANDARD ISO 9213 Second edition 2004-04-01 Reference number ISO 9213:2004(E) ISO 2004 Measurement of total discharge in open channels Electromagnetic method using a full-channel-width coil Mesurage du dbit total dans les canaux dcouverts Mthode lectromagntique laide dune bobine dinduc
2、tion couvrant toute la largeur du chenal Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 23:34:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 92
3、13:2004(E) ii ISO 2004 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer perform
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6、retariat at the address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the a
7、ddress below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland Copyright International Organization for Standardization Provided by
8、IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 23:34:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 9213:2004(E) ISO 2004 All rights reserved iii Contents Page 1Scope 1 2Normative references 1 3Terms and definiti
9、ons 1 4Principles of operation and practice 1 5Applications . 5 6Selection of site . 6 7Design and construction . 6 8Uncertainties in flow measurement . 12 9Gauge calibration and verification . 13 Annex A (informative) Site survey for electrical interference . 14 Annex B (informative) Design aspects
10、 of the electromagnetic coil . 15 Annex C (informative) Numerical example of the calculation of uncertainty . 16 Annex D (normative) Gauge calibration procedure 17 Bibliography . 19 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technica
11、l Standards 1/9972545001 Not for Resale, 04/18/2007 23:34:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 9213:2004(E) iv ISO 2004 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bo
12、dies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizatio
13、ns, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the
14、ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of th
15、e member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 9213 was prepared by Technical Committee ISO/TC 113, Hydrometry,
16、Subcommittee SC 1, Velocity area methods. This second edition cancels and replaces the first edition (ISO 9213:1992), which has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not
17、 for Resale, 04/18/2007 23:34:30 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARDISO 9213:2004(E) ISO 2004 All rights reserved 1 Measurement of total discharge in open channels Electromagnetic method using a full-channel-width coil 1Scope This Internat
18、ional Standard specifies procedures for the establishment and operation of a gauging station, equipped with an electromagnetic flow meter, in an open channel or a closed conduit with a free water surface. This International Standard is applicable to configurations where an artificial magnetic field
19、is generated through which the entire body of water flows. The induced voltage is sensed in such a way that all elements of the moving water contribute. The equipment described normally requires an electrical mains power supply. This International Standard is not applicable to devices sampling only
20、part of the flowing body of water (e.g. velocity meters) or to flow meters which operate by using the Earths magnetic field. 2Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For unda
21、ted references, the latest edition of the referenced document (including any amendments) applies. ISO 748, Measurement of liquid flow in open channels Velocity-area methods ISO 772, Hydrometric determinations Vocabulary and symbols ISO 1100-2, Measurement of liquid flow in open channels Part 2: Dete
22、rmination of the stage-discharge relation ISO 5168:1), Measurement of fluid flow Evaluation of uncertainties ISO/TR 7066-1, Assessment of uncertainty in calibration and use of flow measurement devices Part 1: Linear calibration relationships 3Terms and definitions For the purposes of this document,
23、the terms and definitions given in ISO 772 apply. 4Principles of operation and practice 4.1This is a velocity-area method of discharge determination. The electromagnetic gauge operates on Faradays principle of electromagnetic induction. If a length of conductor moves through a magnetic field, a volt
24、age is generated between the ends of the conductor. In the electromagnetic gauge, a vertical magnetic field is generated by means of an insulated coil which is located either above or beneath the channel. The conductor is formed by the water which moves through the magnetic field; the ends of the co
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