The low liquid flow calibration facility is developed together by Beijing Aerospace Propulsion Institute, National Institute of Metrology and Dandong Best Automatic Engineering & Meter Ltd. The facility is designed using static-gravimetric method to calibrate mass flow meters, turbine flow meters and vortex shedding flow meters, from 4 mm to 25 mm in diameter, at flow rates ranging from 8.2 kg/h to 10890 kg/h. It is designed as a integrated movable machinery, to construct a closed system to certificate flow meters. Besides, it can be combined with special test-bed systems to certificate flow meters on-line. The facility can automatically process flow adjusting, diverter switching, water tank bleeding, data acquiring, recording and printing, etc. It incorporates a diverter valve design, which greatly reduces the uncertainty associated with the flow diversion into the collection tank. This paper details design and construction novelties of the system and outlines the uncertainty of the calibration facility.
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