BS 1646-3:1984

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Symbolic representation for process measurement control functions and instrumentation – Specification for detailed symbols for instrument interconnection diagrams

Published By	Publication Date	Number of Pages
BSI	1984	26

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Categories: 25.040.40 - Industrial process measurement and control, BSI

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Description

This part of BS 1646 specifies instrument symbols for use on interconnection diagrams used for the design, installation, and maintenance of process measurement and control systems.

These detailed symbols are not normally intended for drawings that use the functional symbols given in BS 1646-1 and BS 1646-2. However, the symbols specified in this part of BS 1646 show, by detailing the components, the external connections between units of equipment.

Information on the internal connections in units is not normally included, but references to the appropriate circuit or wiring diagrams may be provided.

When an instrument is composed of more than one functional part, the different symbols may be combined, for example, recorder controller.

The dimensions of the symbols are unspecified, provided the ratio of the side lengths is maintained according to this part of BS 1646¹⁾.

If not otherwise stated, contact symbols should be shown open.

The diagrams may employ single line or multi-line representation and may be combined with, or replaced by tables, providing clarity is maintained.

For further assistance see IEC 113-5, Preparation of interconnection diagrams and tables.

Depicts, by detailing the components, the external connections between units of equipment. These symbols are intended for use at all stages of design, manufacture, installation and operation but are not intended to replace graphic symbols for electrical equipment.

Additional information

Status	Confirmed
Pages	26
Publication Date	1984-01-31
ISBN	0 580 13598 5
Standard Number	BS 1646-3:1984
Title	Symbolic representation for process measurement control functions and instrumentation – Specification for detailed symbols for instrument interconnection diagrams
Technically Equivalent National Standard Of	ISO/DIS 3511-3
Descriptors	Graphic symbols, Layout, Hydraulic control systems, Process control, Drawings, Production equipment, Graphic representation, Process charts, Technical drawing, Diagrams, Pneumatic control systems, Mechanical control systems, Control systems, Control devices, Instruments, Control equipment, Engineering drawings, Symbols
Publisher	BSI
Committee	TPR/1
ICS Codes	25.040.40 - Industrial process measurement and control

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BS 1646-3:1984

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