Jodie G. Pope, Aaron N. Johnson, Bernard J. Filla, Joey T. Boyd, Vern E. Bean, Christopher J. Crowley
We describe a new dynamic, gravimetric, liquid flow standard (LFS) that determines flow by measuring the rate of change of the liquid mass accumulating in a collection tank. The LFS is a fully- automated,15 kg/s system that uses a proportionalintegralderivative (PID) control loop to achieve liquid flows with a stability that is the smaller of 0.001 % or 0.1 kg/s. The expanded uncertainty (corresponding to 95 % confidence level) is 0.021 % for the flow range of the standard; 15 kg/s to 0.22 kg/s. We verify the uncertainty budget by comparing the LFS results with two well-established NIST primary flow standards.
9th International Symposium on Fluid Flow Measurement
, Johnson, A.
, Filla, B.
, Boyd, J.
, Bean, V.
and Crowley, C.
NIST's Fully Dynamic Gravimetric Liquid Flowmeter Standard., 9th International Symposium on Fluid Flow Measurement , Arlington, VA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918213
(Accessed April 23, 2021)