ISA-5.3-1983 Graphic Symbols for Distributed ControlShared Display Instrumentation, Logic and Computer Systems
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01E9E2A7F18A45759EB2346F0021D1CE |
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文件大小(MB)： |
0.32 |
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页数： |
22 |
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日期： |
2009-5-22 |
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文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
Graphic Symbols for,Distributed Control/Shared,Display Instrumentation,Logic and Computer Systems,Approved 30 June 1982,ISA–5.3–1983,Formerly ISA–S5.3–1983,STANDARD,ISA The Instrumentation,Systems, and,Automation Society,–,TM,Copyright ?1983 by the Instrument Society of America. All rights reserved. Printed in the United,States of America. No part of this publication may be reproduced, stored in a retrieval system, or,transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or,otherwise), without the prior written permission of the publisher.,ISA,67 Alexander Drive,P.O. Box 12277,Research Triangle Park, North Carolina 27709,ISA-5.3-1983, Graphic Symbols for Distributed Control/Shared Display Instrumentation, Logic and,Computer Systems,ISBN 0-87664-707-7,ISA-S5.3-1983 3,Preface,This preface is included for informational purposes and is not part of ISA-5.3-1983.,This Standard has been prepared as a part of the service of ISA toward a goal of uniformity in the,field of instrumentation. To be of real value, this document should not be static but should be,subject to periodic review. Towards this end, the Society welcomes all comments and criticisms,and asks that they be addressed to the Secretary, Standards and Practices Board, ISA, 67,Alexander Drive, P.O. Box 12277, Research Triangle Park, North Carolina 27709, telephone 919-,549-8411, e-mail: standards@isa.org.,The ISA Standards and Practices Department is aware of the growing need for attention to the,metric system of units in general, and the International System of Units (SI) in particular, in the,preparation of instrumentation standards. The Department is further aware of the benefits to,USA users of ISA Standards of incorporating suitable references to the SI (and the metric,system) in their business and professional dealings with other countries. Towards this end this,Department will endeavor to introduce SI and SI-acceptable metric units in all new and revised,standards to the greatest extent possible. The Metric Practice Guide, which has been published,by the American Society for Testing and Materials as ANSI designation Z210.1 (ASTM E380-76.,IEEE Std. 268-1975), and future revisions, will be the reference guide for definitions, symbols,abbreviations, and conversion factors.,The systems referenced in this Standard are based on advances in control systems technology,since the publication of ISA-S5.1, "Instrumentation Symbols and Identification." During recent,years, technology has evolved in terms of microprocessor-based systems presently,manufactured by many companies as "Distributed Control Systems.",These systems may include components identified as "computers" as distinct from the integral,processor, which derives the various functions of the system. The computer component may be,integrated into the overall system, via the communication link, or it may be a stand-alone,computer.,In attempting to implement these systems, the need for supplementary symbolism has become,apparent.,The symbols defined in ISA-S5.3 are intended to complement those of ISA-S5.1,"Instrumentation Symbols and Identification," for use on flow diagrams. In this way, the,integration of distributed controllers and process computers into the more traditional instrument,systems — analog, binary, and digital — can be depicted clearly on flow diagrams and other,documents to give an overall and comprehensive picture of how process variables are measured,and controlled.,Distributed control systems appear to be similar to each other; however, they are so diverse in,philosophy that there must be a generic way to document their application.,The second printing of ISA-S5.3, dated April 1983, was published to correct errors in the original,1982 edition. The definition for communication link, Section 3, has been corrected and an,omitted abbreviation, C.R.T., added. Minor clarifications were also made to the Appendix A,artwork.,The ISA Standards Committee on Graphic Symbols for Distributed Control/Shared Display,Instrumentation, Logic, and Computer Systems, SP5.3, operates within the ISA Standards and,Practices Department, Dr. Thomas J. Harrison, Vice President. The persons listed below served,as members of the SP5.3 Committee.,4 ISA-S5.3-1983,NAME COMPANY,D. E. Rapley, Chairman Stearns-Roger Engineering Corporation,A. Bohnenberger, Secretary (deceased) Johns-Manville Sales Corporation,R. Barber Ralph M. Parsons Company,G. V. Barta Dow Corning Corporation,G. Bennett Bechtel Power Corporation,J. Biggs Dow Chemical USA,R. V. Bins Toledo Edison Company,M. A. Blaschke Weyerhaeuser Company,C. T. Carroll Foster Wheeler,W. Cohen M. W……
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