Analogue pneumatic signal for process control systems
|Publication Date:||1 November 1991|
|ICS Code (Industrial process measurement and control):||25.040.40|
Scope and object
This International Standard specifies the analogue pneumatic signal used in industrial-process measurement and control systems to transmit information between the elements of such systems.
It is applicable to:
a) pneumatic controllers;
b) pneumatic transmitters and information transmission systems.
This standard does not apply to analogue pneumatic signals used entirely within an element.
The object of this standard is to establish:
a) a standard operating pressure range for pneumatic information transmission systems;
b) a standard air supply pressure (with limit values) for the operation of pneumatic controllers and transmitters, pneumatic information transmission systems, current-to-pressure transducers, and similar devices.