ARO 312 Lec 8 Instrumentation
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A physical device that reports a measurement
A sensor that converts a physical property to an electrical property
Converts an electrical property to an electrical property
The extent to which a measurement can be reported
A numerical representation of how well an instrument performs
The numerical difference between the measurement and the actual value
The amount by which a given measurement is uncertain
-based on all components of the measuring system
Temperature Sensors (3 examples)
- Thermocouples (two different metals)
- Resistance Thermal Device (RTD)
- Platinum Resistance Thermometer (PRT)
How much power (voltage and current) needed for the instrument to work
Its input divided by its output (ex: volts/psi)
Accuracy (sensor specification)
How well does the instrument perform?
How fast does it perform?
Process of analyzing data from a given set of instruments without comparison to a known standard
A comparison of two measurements, one from a 'standard', the other from 'the instrument under test'
What is used to compute accuracy?
What is uncertainty calculated from?
The computation of a generalized equation representing a given set of raw data
What would you like to do?
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