1、BRITISH STANDARD BS ISO 14617-6:2002 Graphical symbols for diagrams Part 6: Measurement and control functions ICS 01.080.30 BS ISO 14617-6:2002 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2004 BSI 31 August 2004 ISBN 0 580 44375
2、 2 National foreword This British Standard reproduces verbatim ISO 14617-6:2002 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical product specification, which has the responsibility to: A list of organizations
3、 represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or b
4、y using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immun
5、ity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them
6、in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 23 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publicat
7、ion Amd. No. Date Comments Reference number ISO 14617-6:2002(E)INTERNATIONAL STANDARD ISO 14617-6 First edition 2002-09-01 Graphical symbols for diagrams Part 6: Measurement and control functions Symboles graphiques pour schmas Partie 6: Fonctions de mesurage et de contrle BSISO146176:2002ii BSISO14
8、6176:2002IS-71641 O6:(2002E) iiiContents Page Foreword iv Introduction. v 1 Scope 1 2 Normative references 1 3 Terms and definitions. 2 4 Functional links and junctions 3 5 Point of measurement. 5 6 Operation of final controlling elements 5 7 Information-processing functions. 10 8 Binary logic funct
9、ions. 20 9 Back-up functions . 20 10 Examples of use of symbols in control loops 21 Bibliography 23 BSISO146176:2002IS-71641 O6:(2002E) iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepari
10、ng 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 organizations, governmental and non-governmental, in lia
11、ison 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 ISO/IEC Directives, Part 3. The main task of
12、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 the member bodies casting a vote. Attention is
13、drawn to the possibility that some of the elements of this part of ISO 14617 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14617-6 was prepared by Technical Committee ISO/TC 10, Technical product documentation, Subcommittee
14、SC 10, Process plant documentation and tpd-symbols. ISO 14617 consists of the following parts, under the general title Graphical symbols for diagrams: Part 1: General information and indexes Part 2: Symbols having general application Part 3: Connections and related devices Part 4: Actuators and rela
15、ted devices Part 5: Measurement and control devices Part 6: Measurement and control functions Part 7: Basic mechanical components Part 8: Valves and dampers Part 9: Pumps, compressors and fans Part 10: Fluid power converters Part 11: Devices for heat transfer and heat engines Part 12: Devices for se
16、parating, purification and mixing Part 15: Installation diagrams and network maps Other parts are under preparation. BSISO146176:2002IS-71641 O6:(2002E) vIntroduction The purpose of ISO 14617 in its final form is the creation of a library of harmonized graphical symbols for diagrams used in technica
17、l applications. This work has been, and will be, performed in close cooperation between ISO and IEC. The ultimate result is intended to be published as a standard common to ISO and IEC, which their technical committees responsible for specific application fields can use in preparing International St
18、andards and manuals. BSISO146176:2002BSISO146176:2002INTENRATIONAL TSANDADR IS-71641 O6:(2002E)1Graphical symbols for diagrams Part 6: Measurement and control functions 1 Scope This part of ISO 14617 specifies graphical symbols for measurement and control functions in diagrams, with the same symbols
19、 in simple applications possibly representing instead components or devices implementing such functions. For graphical symbols for measurement and control components and devices, see ISO 14617-5. For the fundamental rules of creation and application of graphical symbols in diagrams, see ISO 81714-1.
20、 For an overview of ISO 14617, information on the creation and use of registration numbers for identifying graphical symbols used in diagrams, rules for the presentation and application of these symbols, and examples of their use and application, see ISO 14617-1. 2 Normative references The following
21、 normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 14617. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 14617 are
22、encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. I
23、SO 31-11:1992, Quantities and units Part 11: Mathematical signs and symbols for use in the physical sciences and technology ISO 14617-1:2002, Graphical symbols for diagrams Part 1: General information and indexes ISO 14617-2:2002, Graphical symbols for diagrams Part 2: Symbols having general applica
24、tion ISO 14617-3:2002, Graphical symbols for diagrams Part 3: Connections and related devices ISO 14617-4:2002, Graphical symbols for diagrams Part 4: Actuators and related devices ISO 14617-5:2002, Graphical symbols for diagrams Part 5: Measurement and control devices ISO 14617-8:2002, Graphical sy
25、mbols for diagrams Part 8: Valves and dampers ISO 81714-1:1999, Design of graphical symbols for use in the technical documentation of products Part 1: Basic rules IEC 60617-12:1997, Graphical symbols for diagrams Part 12: Binary logic elements IEC 60617-13:1993, Graphical symbols for diagrams Part 1
26、3: Analogue elements IEC 61175:1993, Designations for signals and connections BSISO146176:2002IS-71641 O6:(2002E) 2 3 Terms and definitions For the purposes of this part of ISO 14617, the following terms and definitions apply. NOTE The list has been restricted to terms whose meaning is not obvious a
27、nd which have not been defined elsewhere in an International Standard, or which have been defined in various ways in different standards. In preparing these definitions, ISO and IEC standards on terminology have been consulted; see the references in parentheses. However, most of the definitions in t
28、hose standards were prepared by different technical committees within a restricted scope. This means that many terms so defined have to be given more general or neutral definitions when applied in the context of graphical symbols. 3.1 control purposeful action on or in a system to meet specified obj
29、ectives IEC 60050-351 NOTE Control may include monitoring and safeguarding in addition to the control action itself. 3.2 operation transfer of mechanical parts IEC 60050-441 EXAMPLE The closing member of a shut-off valve or the contacts of an electromechanical switching device. NOTE 1 The transfer d
30、irection may be defined as an opening operation, closing operation, ON-operation, OFF-operation, etc. NOTE 2 The term has a specific meaning in conjunction with electric measuring relays. An over/under- relay is operating when its characteristic quantity reaches the set value by increasing/decreasin
31、g in value (IEC 60050-448). 3.3 manual control control of an operation by human intervention ISO 5598, IEC 60050-351 3.4 automatic control, operation self-acting (not needing human intervention) ISO 5598, IEC 60050-351 3.5 final controlling element element which directly changes the output variable
32、of a controlling system (manipulated variable) IEC 60050-351 3.6 delay device device providing a time interval between the instant when an actuating force is applied or removed and the instant when the consequent change of position or state of the affected parts start 3.7 automatic return device dev
33、ice for returning movable parts, such as those of a valve to initial position (at-rest position), after an actuating force has been removed BSISO146176:2002IS-71641 O6:(2002E) 33.8 detent device which retains movable parts, for example, those of a valve, in a certain position until sufficient force
34、is applied to overcome the detaining force in order to move the parts to another position ISO 5598 3.9 latching device mechanical device giving movable parts, for example, those of a valve, the possibility to move in one direction but preventing them from returning until the latch has been released
35、ISO 5598 3.10 blocking device mechanical device preventing movable parts, for example, those of a valve, from moving in any direction until the blocking device has been released 3.11 interlocking device mechanical device making the operation of movable parts of one component, for example, a contacto
36、r, dependent on the position or state of another component with movable parts IEC 60050-441 3.12 information processing performing of operations on data to obtain or treat information 3.13 primary location location of measuring instruments, potentiometers etc. accessible to an operator cf. auxiliary
37、 location (3.14) 3.14 auxiliary location location of measuring instruments, potentiometers etc. not accessible to an operator, for example, behind a panel. cf. primary location (3.13) 4 Functional links and junctions 4.1 Symbols of a basic nature 4.1.1 401 Functional connection See R401 (4.2.1) and
38、R402 (4.2.2). 4.1.2 501 Joint of connections See R501 (4.2.3). BSISO146176:2002IS-71641 O6:(2002E) 4 4.2 Application rules for the symbols in 4.1 4.2.1 R401 Symbols for connections may cross each other. 4.2.2 R402 When confusion between symbols 401 (4.1.1) and 405 (3-4.1.5) to 410 (3-4.1.10) for oth
39、er types of connections is likely, symbol 431 (4.3.1) shall be added. 4.2.3 R501 The diameter of the dot should be five times the width of the line. The symbol may be omitted in a T-joint. For an example, see X505 (3-5.5.5). 4.3 Symbols giving supplementary information 4.3.1 431 Pure functional type
40、 4.3.2 249 Direction of propagation, energy, or signal flow (simplex) See R247 (4.4.1). 4.3.3 250 Direction of propagation, energy, or signal flow, alternative directions (half-duplex) See R247 (4.4.1). 4.3.4 251 Direction of propagation, energy, or signal flow simultaneously in both directions poss
41、ible (full-duplex) See R247 (4.4.1). 4.3.5 234 Analogue signal 4.3.6 235 Digital signal 4.3.7 236 Binary signal 4.4 Application rules for the symbols in 4.3 4.4.1 R247 The symbol shall be shown on the connecting line and located such that it does not touch any other symbol. The symbol may also be us
42、ed to indicate the transfer direction of a component or device, in which case the symbol should be located on the outline of the basic symbol. 4.5 Application examples See clause 10. BSISO146176:2002IS-71641 O6:(2002E) 55 Point of measurement 5.1 Symbol of a basic nature 5.1.1 1011 Point of measurem
43、ent See R1011 (5.2.1). 5.2 Application rule for the symbol in 5.1 5.2.1 R1011 The symbol shall be used if it is necessary to clearly indicate the location of the point of measurement. For an example, see X1011 (5.5.1). 5.3 Symbol giving supplementary information None. 5.4 Application rule for the sy
44、mbol in 5.3 None. 5.5 Application examples 5.5.1 X1011 249, 401, 1011, 2062 Measurement inside and near the bottom of a pressure vessel 5.5.2 X1012 249, 401, 405 Measurement in a pipeline The use of symbol 1011 (5.1.1) is not regarded as necessary. 6 Operation of final controlling elements 6.1 Symbo
45、ls of a basic nature 6.1.1 1021 Manual operation of a final controlling element 6.1.2 1022 Automatic operation of a final controlling element The input may be a binary (#) or an analogue () signal. See R1021 (6.2.1). BSISO146176:2002IS-71641 O6:(2002E) 6 6.2 Application rules for the symbols in 6.1
46、6.2.1 R1021 If necessary, the input or inputs shall be provided with signal designations (see IEC 61175) indicating the action of the signals. When the final controlling element is of the bistable type, two input signals are needed. For an example, see X1032 (6.5.12). In many cases the diagram may b
47、e simplified by indicating the two inputs by only one functional link provided with two signal names. For an example, see X1033 (6.5.13). 6.3 Symbols giving supplementary information 6.3.1 651 Form 1 200 % 6.3.2 652 Form 2 200 % Delay device where the action is delayed when the direction of movement
48、 is towards the centre of the arc See R651 (6.4.1). 6.3.3 653 200 % Delay device where the action is delayed in both directions See R651 (6.4.1). 6.3.4 654 200 % Automatic return device The return direction is towards the apex. See R652 (6.4.2) and R1022 (6.4.3). 6.3.5 655 200 % Detent for detaining
49、 in a discrete position See R652 (6.4.2). 6.3.6 659 200 % Detent for detaining in any position See R652 (6.4.2). 6.3.7 660 200 % Detent for detaining in any position, drift to the left permitted See R1023 (6.4.4). 6.3.8 661 200 % Latching device 6.3.9 664 200 % Blocking device 6.3.10 666 200 % Interlocking device 6.4 Application rules for the symbols in 6.3 6.4.1 R651 The double line shall be attach
