Calibration

When recording or analysing any signal it is necessary to calibrate the system with a known signal.

Calibration minimizes systematic error.

Acoustic Calibrator

A device which produces a known sound pressure on the microphone of a sound level measurement system, and is used to adjust the system to Standard specifications.

Shunt Calibration

Shunt calibration is a method of simulating a known value of the measurand for bridge-type transducers.

A fixed value resistor is connected across one or more arms of the Wheatstone bridge. This produces a known output from the bridge, and is used for verifying the accuracy of the data acquisition system, including the excitation supply, amplifier and acquisition system.

See also: Acoustic Calibrator, Calibrate.

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Subjects: Mechanical Engineering