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Title: Improvement To Small Hydrocarbon Flow Calibration Facility At Nmij
Author: Kar-Hooi Cheong, Ryouji Doihara, Takashi Shimada, Yoshiya Terao
Source: 2012 International Symposium on Fluid Flow Measurement
Year Published: 2012
Abstract: Improvement has been made to the primary standard for small flow of liquid hydrocarbon at NMIJ to upgrade the calibration capability to include volumetric flow range of 0.01 m3/h 0.1 m3/h and also to include kerosene as the working liquid. The best calibration and measurement capability (CMC) is estimated to be 0.064 % for volumetric flow rate and 0.020 % for mass flow rate (coverage factor: k2). In-house comparisons between small and medium hydrocarbon flow facilities at NMIJ were carried out, using servo PD flowmeter and Coriolis flowmeter. Calibration results by Coriolis flowmeter showed a good agreement between the two facilities. However a certain discrepancy was found in the calibration results of servo PD flowmeter between the two facilities. Efforts were made to clarify the discrepancy. Keywords: Small hydrocarbon flow calibration facility, volumetric flow rate, kerosene, in-house comparison, servo PD flowmeter

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