BS 1646-1-1979 ISO 3511-I-1977.pdf
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1、BRITISH STANDARD BS 1646-1: 1979 ISO 3511/I-1977 Symbolic representation for process measurement control functions and instrumentation Part 1: Basic requirements ISO title: Process measurement control functions and instrumentation Symbolic representation UDC 53.08:621.2:003.62 Licensed Copy: sheffie
2、ldun sheffieldun, na, Fri Nov 24 03:10:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1646-1:1979 This British Standard, having been prepared under the direction of the Industrial Process Measurement and Control Standards Committee, was published under the authority of the Executive Board and come
3、s into effect on 30 November 1979 BSI 12-1998 First published December 1950 First revision March 1964 Second revision 30 November 1979. The following BSI references relate to the work on this standard: Committee reference PCL/4 Draft for comment 78/28752 DC ISBN 0 580 10980 1 Cooperating organizatio
4、ns The Industrial Process Measurement and Control Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government department and scientific and industrial organizations: British Gas Corporation British industrial Measuring and
5、Control Apparatus Manufacturers Association* British Steel Corporation CBMPE* Control and Automation Manufacturers Association (BEAMA) Department of industry (Computers Systems and Electronics) Electrical, Electronic, Telecommunications and Plumbing Union Electricity Supply Industry in England and W
6、ales Electronic Engineering Association Engineering Equipment Users Association* Institute of Measurement and Control* Institution of Electrical Engineers* Institution of Gas Engineers* Oil Companies Materials Association* Post Office Engineering Union Scientific Instrument Manufacturers Association
7、* Sira Institute The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Consulting Engineers Chemical industries Association Ministry of Defence The T
8、ransmission and Distribution Association (BEAMA) Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:10:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1646-1:1979 BSI 12-1998 i Contents Page Cooperating organizations Inside fr
9、ont cover National foreword ii 0 Introduction 1 1 Scope and field of application 1 2 Definitions 1 3 Size and outline of basic symbols 2 4 Letter code 4 5 Types of line and assembly of symbols 4 6 Examples of use of the symbols 7 Table Letter code for identification of instrument functions 5 Publica
10、tions referred to Inside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:10:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1646-1:1979 ii BSI 12-1998 National foreword This British Standard has been prepared under the direction of the Industrial Process Measurement and Control
11、 Standards Committee. It was first published in 1950 and subsequently revised in 1964. This revision is identical with ISO 3511/I-1977 “Process measurement control functions and instrumentation Symbolic representation Part I: Basic requirements” published by the International Organization for Standa
12、rdization (ISO). Terminology and conventions. The text of the international standard has been approved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn
13、 to the following: Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applic
14、ation. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International standardCorresponding British Standard IEC 117BS 3939 Graphical symbols for electrical power, telecommunications and electronics diagrams (Technically equivalent) ISO/R
15、 128-1959BS 308 Engineering drawing practice Part 1:1972 General principles (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 14, an inside back cover and a back cover. This standard has been updated (see copyright date
16、) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:10:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1646-1:1979 BSI 12-19981 0 Introduction This International Standard has b
17、een devised to provide a universal means of communication between the various interests involved in the design, manufacture, installation and operation of measurement and control equipment used in the process industries. Requirements within the industries vary considerably, and in recognition of thi
18、s, this International Standard is presented in three parts as follows: Part I: Basic requirements (directed towards the needs of those whose prime interest is in basic measurement and control means); Part II: Extension of basic requirements; Part III: Detailed symbols. The three parts together are i
19、ntended a) to meet the requirements of those who, possibly employing more sophisticated measurement and control means, may wish to depict such aspects as the measurement techniques embodied in a particular instrument, or the means hydraulic, pneumatic, electrical, mechanical used for its actuation;
20、b) to provide standard symbolic representation for process measurement control functions and instrumentation. These symbols are not intended to replace graphic symbols for electrical equipment as contained in IEC Publication 117. 1 Scope and field of application Part 1 of this International Standard
21、 establishes a symbols system for use in depicting the basic functions of measurement and control equipment in relation to the plant with which it is associated. The system has been intentionally limited to the identification of instrument functions and does not provide means of illustrating specifi
22、c instruments. 2 Definitions The following definitions are used solely for the purpose of this International Standard to assist in the application and understanding of the symbol system. 2.1 point of measurement the point in a process at which a measurement is or may be made 2.2 instrument a device
23、or combination of devices used directly or indirectly to measure, display and/or control a variable. This term does not apply to internal components of the instruments, for example resistor or receiver bellows 2.3 panel-mounted instrument an instrument that is mounted in a group normally accessible
24、to the operator 2.4 locally mounted instrument an instrument that is not panel mounted 2.5 correcting unit the unit comprising those elements (actuating and correcting) which adjust the correcting conditions, in response to a signal from the controller 2.6 actuating element that part of the correcti
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