Instrumentation_engineering

Instrumentation_engineering - Instrumentation From...

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Pneumatic PID controller. Instrumentation is the branch of engineering that deals with measurement and control. According to ISA or known as Instrumentation and Systems Automation Society formerly known as Instrument Society of America , the official definition of Instrumentation - is a collection of Instruments and their application for the purpose of Observation, Measurement and Control. Reference: ISA std. S 51.1 – (Instrument Society of America) An instrument is a device that measures or manipulates variables such as flow, temperature, level, or pressure. Instruments include many varied contrivances which can be as simple as valves and transmitters, and as complex as analyzers. Instruments often comprise control systems of varied processes. The control of processes is one of the main branches of applied instrumentation. Control instrumentation includes devices such as solenoids , valves , circuit breakers , and relays . These devices are able to change a field parameter, and provide remote or automated control capabilities. Transmitters are devices which produce an analog signal , usually in the form of a 4–20 mA electrical current signal, although many other options using voltage , frequency , or pressure are possible. This signal can be
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