2. Measurement Process Characterization
2.6. Case studies

2.6.5.

Uncertainty analysis for extinguishing fire

Uncertainty for Values Predicted From a Calibration Curve

This case study demonstrates the analysis of uncertainty for values predicted from a calibration curve where there is uncertainty in both the predictors and the predicted values. It relates to the volume fraction of nitrogen required to extinguish flame on the surface of a plastic cylinder.

Contents

The case study is divided into the following sections:

1. Background and data.
2. Create a calibration curve for the rotatmeter.
3. Compute predicted values and standard deviations of predicted values of flowrate.
4. Convert the flowrates to nitrogen volume fractions (%).
5. Uncertainties for the nitrogen volume fractions due to the calibration curve.
6. Uncertainties for the nitrogen volume fractions due to flux measurements.
7. Combine uncertainties to obtain a total uncertainty.
8. Work this example yourself.