Answer to Question #174087 in Electrical Engineering for Thelston

Question #174087

A pressure transmitter has the following specifications:

Lower Range Limit = 0.5 MPa

Upper Range Limit = 10.5 MPa

Reference Accuracy = .05% of span

Span Error = .10% of span

Zero Error = .05% of span

Thermal Span Error = .10% of span

Overpressure Error = .09% of span

What is the total error budget in MPa? (Type in a four-place decimal).



1
Expert's answer
2021-03-23T08:04:16-0400

Find the total error budget as a percentage of the span:


"\\epsilon=\\pm(0.05\\%+0.1\\%+0.05\\%+0.1\\%+0.09\\%)=\\\\=0.39\\%"

The span is the difference between upper range limit (URL) and lower range limit (LRL):


"S=URL-LRL=10.5+0.5=10\\text{ MPa}."


The total error budget in MPa is


"\\epsilon_S=\\epsilon\u00b7S=\\frac{0.39\\%\u00b710}{100\\%}=\\pm0.039\\text{ MPa}."

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