Tolerance and Uncertainty have the same Symbol - How to Calculate the Tolerance

C

charlie79

#1
As we know that tolerance and uncertainty has the same symbol...

i know to know how to calculate the tolerance ...
somebody know ....

thanks
 
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Jen Kirley

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#2
Re: Tolerance and uncertainty

Good day Charlie,

If you are referring to measurement tolerance I would expect to consult the drawings/specifications for accepted tolerance and calculate using Geometric Dimensioning & Tolerancing principles. See page 8 for a quick example of arriving at tolerance using drawing dimensions.

But if you are thinking in statistical terms, NIST has instructions for calculating tolerance intervals of a population.

In calibration tolerance and uncertainty are not the same thing, as this Calibration Principles paper from Isa.org explains. But a paper titled Metrology Concepts: Understanding Test Uncertainty Ratio (TUR) from Transcat explains the relationship.

I hope one of these resources helps!
 
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