Abstract
Static gravimetric method with flying start-and-finish is widely used for calibration of large and medium liquid flow for its advantage of maintaining continuous flow through the flowmeter. However one needs to take certain considerations in implementing this method in small flow systems to obtain good accuracy. At NMIJ/AIST, we adopted this calibration method for small hydrocarbon flow facility using a newly designed diverting system - a cone-shaped rotating double-wing diverter - for flow range between 1 L/h~100 L/h. This paper describes the design features and operation of the diverting system, and also discusses the timing error of the diverting system evaluated according to ISO4185.
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