Instrumentation & Process Control - Chapter 1

Instrumentation

collective term for measuring instruments.

indicating, measuring, recording physical quantities

Process Control

Feedback from output back to actuation

Instrument

measurement of condition, performance, position and direction

Converter

change the format of signal, not its forn

Transmitter

amplify and formatting of signal for long distance

Controllers

devices that monitor signals and perform actions in a predefined program for the actuators

Transducer

change one form of energy to another

Actuators

control input variables based from a signak controller

Instrument Parameters(List)

• Accuracy

• Range

• Span

• Precision

• Reproducibility

• Offset

• Drift

Accuracy

discrepancy between suggested and actual values

Range

lowest and highest readings it can measure

Span

range from minimum to maximum value

Precision

limits of reading the signal

Reproducibility

repeatedly creating the same

Offset

reading with 0 input, and an overshoot

Drift

change in reading with respect to time