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Title: Evaluation Of A Gravimetric Calibration Facility Using A Double - Wing D Iverter With F Our Types Of Working Liquids
Author: R. Doihara K. H. Cheong, T. Shimada Y. Terao
Source: Flomeko 2016
Year Published: 2016
Abstract: flow calibration facility based on the gravimetric method using a double - wing diverter for hydrocarbon flows from 0.1 to 15 m 3 /h was constructed as a national measurement standard at the National Metrology Institute of Japan (NMIJ). The original working liquids were kerosene and light oil. The calibration facility was modified to calibrate flowmeters with two additional working liquids, industrial gas oline (flash point 40 ? C ) and spindle oil, to achieve calibration over a wide viscosity range. The kinem atic viscosity range of industrial gasoline, kerosene, light oil, and spindle oil is 1.2 - 24 mm 2 /s. The contributions to the measurement uncertainty for the four types of working liquids were analysed experimentally in this study. The uncertainty due to dro plets from the diverter wings was reduced by a modified diverter operation. The diverter timing errors for all types of working liquids were estimated based on the method described in ISO4185.