Characteristics of Instrumentation An instrument is a device that transforms a physical variable of interest (the measurand) into a form that is suitable.

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Presentation transcript:

Characteristics of Instrumentation An instrument is a device that transforms a physical variable of interest (the measurand) into a form that is suitable for recording (the measurement). basic instrument is a ruler measurand number of units

Simple Instrument Model measurand sensorr measurementSignal variable Physical Measurement Variable display Physical Process x S

Common physical Typical signal variables Force Voltage Length Displacement Temperature Current Acceleration Force Velocity Pressure Pressure Light Frequency Frequency Capacity Resistance Time …

Instrument model with amplifier, analog to digital converter, and computer output.