ANSI-ISA-5.1-1984(R1992) Instrumentation Symbols and Identification
|
ID： |
88D9F72BC1FF42079161C08B325D5DCB |
|
文件大小(MB)： |
2.72 |
|
页数： |
72 |
|
文件格式： |
|
|
日期： |
2009-5-22 |
|
购买： |
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）：
Instrumentation Symbols,and Identification,Reaffirmed 13 July 1992,ANSI/ISA–5.1–1984 (R1992),Formerly ANSI/ISA–S5.1–1984 (R1992),AMERICAN NATIONAL STANDARD,ISA The Instrumentation,Systems, and,Automation Society,–,TM,Copyright ?1984 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,ANSI/ISA-5.1-1984 (R1992), Instrumentation Symbols and Identification,ISBN 0-87664-844-8,ANSI/ISA-S5.1-1984 (R 1992) 3,Preface,This preface is included for information and is not a part of ANSI/ISA-5.1-1984 (R1992).,This standard has been prepared as 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. Toward 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, NC 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,U.S.A. users of ISA standards of incorporating suitable references to the SI (and the metric,system) in their business and professional dealings with other countries. Toward this end, this,Department will endeavor to introduce 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 Institute of Electrical and Electronics Engineers as ANSI/IEEE Std. 268-1982, and future,revisions will be the reference guide for definitions, symbols, abbreviations, and conversion,factors.,It is the policy of ISA to encourage and welcome the participation of all concerned individuals and,interests in the development of ISA standards. Participation in the ISA standards-making,process by an individual in no way constitutes endorsement by the employer of that individual, of,ISA, or of any of the standards that ISA develops.,The information contained in the preface, footnotes, and appendices is included for information,only and is not a part of the standard.,The instrumentation symbolism and identification techniques described in the standard,accommodate the advances in technology and reflect the collective industrial experience gained,since the publication of Recommended Practice RP5.1 in 1949.,This revision attempts to strengthen the standard in its role as a tool of communication in the,process industries. Communication presupposes a common language; or, at the very least, it is,facilitated by one. The standard offers the foundation for that common language.,When integrated into a system, the symbols and designations presented here form a concise,dedicated language which communicates concepts, facts, intent, instructions, and knowledge,about measurement and control systems in the process industries.,This document is a consensus standard rather than a mandatory one. As such, it has many of,the strengths and the weaknesses of consensus standards. Its primary strength is that it can be,used in widespread, interdisciplinary ways. Its weakness is generally that of not being specific,enough to satisfy the special requirements of particular interest groups.,The symbols and identification contained in ISA-S5.1 have evolved by the consensus method,and are intended for wide application throughout the process industries. The symbols and,designations are used as conceptualizing aids, as design tools, as teaching devices, and as a,concise and specific means of communication on all types and kinds of technical, engineering,procurement, construction, and maintenance documents.,4 ANSI/ISA-S5.1-1984 (R 1992),In the past, the standard has been flexible enough to serve all of the uses just described. In the,future, it must continue to do so. To this end, this revision offers symbols, identification, and,definitions for concepts that were not previously described; for example, shared display/control,distributed control, and programmable control. Definitions were broadened to accommodate the,fact ……
……