3511/4 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAR OPTAH 3AUWR NO CTAHAAPTW3ALMM*ORGANISATION INTERNATIONALE DE NORMALISATION Industrial process measurement control functions and instrumentation - Symbolic representation Part 4: Basic symbols for process computer, interface, and shared display/control functions Fonctions de regulation, de mesure etd'automatisme des processus industriels-Representation symbolique- Partie 4:Symboles de base pour la representation des fonctions calculateur First edition -1985-08-15 UDC744.43:62-52:003.62 Ref.No.ISO3511/4-1985(E) Descriptors : technical drawing, graphic symbols, control functions, measuring instruments, control devices, adjusting systems. Document provided by IHS LicenseeShell S v./5924979112, rice based on 8 pages 3-397-229 Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (iSO member bodies). The work of preparing International Standards is normally carried out through ISo technical committees. Each member body interested in asubject for whicha technical committee hasbeen establishedhas the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by least 75 % approval by the member bodies voting. International Standard ISO3511/4was prepared by Technical Committee ISO/TC 10, Technical drawings. This part of Iso 3511 was developed by sub-committee 3, Graphical symbols for instrumentation. The symbols are intended to be used to represent functions and, in special cases,equipment on technical drawings such as schematic diagrams or process flow-diagrams. However, this field of engineering is closely related to electrical instrumentation dealt with by IEC/TC 65 or in part by IEC/SC 3A. For this reason there has been close coordination in a joint working group and the results were accepted by members of ISO and IEC. ? InternationalOrganizationforStandardization,1985 Printed in Switzerland Copyright Intemational Organization for Dacument provided by IHS Licensee-Shell Services Intermalional B.v/5924979112 INTERNATIONAL STANDARD ISO3511/4-1985 (E) Industrial process measurement control functions and instrumentation - Symbolic representation Part 4: Basic symbols for process computer, interface, and shared display/control functions Introduction 0 They are intended to provide a means of illustrating process computer and/or shared display/control functions in the field This International Standard has been devised to provide a of process measurement and control and may be used with the universal means of communication between the various in- symbols of ISo 3511/1and ISO3511/2. They will enable users terests involved in the design, manufacture, installation and to show and identify in simple form the functions of instru- operation of measurement and control equipment used in the ments, the process computer, and shared display/controlfunc- process industries. tions, or any combination of these. It is permissible to use the basic symbol for computer-based Requirements within the industries vary considerably; in functions (see 3.1) throughout for any software-based digital recognition of this, this International Standard is presented in system. This is not intended to preclude the use of the basic four partsasfollows: symbol for shared display/control functions (see 3.2) if the user Part 1: Basic requirements (directed towards the needs of considers this to be appropriate. thoseemployingcomparativelysimplemeasurementand The symbols are intentionally limited to identification on pro control rmeans). cess flow diagrams, piping and instrument diagrams, etc. and do not provide means of illustrating specific instruments or