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Title: The Progress Of Gravimetric Primary Standards For Liquid Flow Calibration At The Danish Technological Institute From 500 m3/h To 1E-9 m3/h
Author: C. Melvad J. Frederiksen
Source: Flomeko 2013
Year Published: 2013
Abstract: The Danish Technological Institute has extended their primary lab liquid calibration range from 5 l/h and down to 1 l/h using gravimetric set-ups. The calibration uncertainty is between 0.05 % and 0.5 %, but the uncertainty still needs to be validated by an intercomparison. A secondary objective when building the standards was to enable dynamic measurement, enabling characterization of varying or pulsating flows. In the paper the design details of the systems going from large flow rates to small flow rates are discussed. Evaluation measurements made to assess the performance of the set-ups as well as the uncertainties are presented

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