An experiment is conducted to verify an acoustical theory. Sixty-one pressure me

Question

An experiment is conducted to verify an acoustical theory. Sixty-one pressure measurements are made at a location using a pressure measurement system consisting of a pressure transducer and a display having units of kilopascals. A statistical analysis of the 61 measurand values yields a sample mean of 200 kPa and a sample standard deviation of 2 kPa. The resolution of the pressure display is 6 kPa. The pressure transducer states that the transducer has a combined hysteresis and linearity error of 2 kPa, a zero-drift error of 2 kPa, and sensitivity error of 1 kPa. a) What classification is this experiment? Determine the system's b) zero-order uncertainty, (c) instrument uncertainty, (d) uncertainty arising from pressure variations, and (e) combined standard uncertainty. Assume 95 % confidence in all of the estimates. Express all estimates the correct number of significant figures.

Explanation / Answer

a) Deterministic experiment

b) zero-order uncertainity=3kPa

c) Instrumental uncertainity=3kPa

e) Combined standard uncertainity=0.25

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