Instrumentation System Assignment - Lab Report Example

The movement is then transduced into an electrical output. Finally, the signal conditioning is needed, depending on sensor and type of application. The Bourdon tubes are example of the major types of sensing elements; they are sealed and deflect in response to any applied pressure. The Pressure gauge is a self-contained indicator used in converting the detected process pressure into proportional mechanical motion of the pointer. The pressure transducer might be a combination of the sensor element of the gauge with mechanical-to-pneumatic with a power supply or mechanical-to-electrical converter.

The system might have a signal conditioner for converting the transducer signal into a proportional standardized output. Transducer’s accuracy denotes the degree of conformity or agreement of the measured value in relation to an accepted standard; usually expressed in percentage of the actual or of the full-scale reading of the instrument; for the percentage-full-scale devices, the error increases proportionally as the absolute values of the measurement drop. The repeatability the bourdons transducer refers to the closeness to agreement in a number of consecutive physical measurements of the same given variable.

Linearity refers to the measurement of the wellness the transducers output increase linearly with pressure increase. Hysteresis error is a phenomenon characterized by the same pressure process resulting from different output signals dependant on whether the present pressure is approached from higher or lower pressure. Digital pressure instrument contain microprocessors that have improved the built-in diagnostic capabilities; increased their accuracy by the introduction of digital compensation that reduces the sensors’ nonlinearities; and have the capability of communicating digitally with the host device in availing different parameters.

The Bourdon tube has elliptical hollow tube, when there is pressure difference between the outside and inside the