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Title: Updating The Uncertainty Analysis For A Flow Calibration Laboratory
Author: T. m. Kegel
Source: 2001 Measurement Science Conference
Year Published: 2001
Abstract: For over thirty years CEESI has maintained the same values of uncertainties for the mass flowrate of air. The uncertainty for one data point from a primary standard has been 0.10% at a 95% level of confidence. The primary standards are used to calibrate critical flow venturi (CFV) secondary standards. The uncertainty for one data point from a secondary standard has been 0.50% at a 95% level of confidence. A hybrid calibration involves a mix of primary and secondary data points, the uncertainty over a flowrate range of a hybrid calibration has been either 0.10% or 0.25% at a 95% level of confidence.

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