Uncertainty Analysis for Flow Measured by molbloc-L and molbloc-S Mass Flow Transfer Standards

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Uncertainty Analysis for Flow Measured by molbloc-L and molbloc-S Mass Flow Transfer Standards (224.38 KB)

This technical note describes the development of this type of uncertainty analysis for two types of mass flow transfer standard products produced by FLUKE/DHI. These are molbloc-L laminar flow elements (LFE) and molbloc-S critical flow nozzles (CFN). The expanded uncertainties from this analysis become Typical Measurement Uncertainties In Flow and are used as product specifications. The user has the option of adopting the Typical Measurement Uncertainty In Flow for their instrument by assuming the environmental conditions and influences of ancillary equipment do not exceed limits defined in the uncertainty analysis, or they can reduce or expand the uncertainty to reflect different limits under which the instruments might be used.