NIST's Fully Dynamic Gravimetric Liquid Flowmeter Standard.

Published

April 13, 2015

Author(s)

Jodie G. Pope, Aaron N. Johnson, Bernard J. Filla, Joey T. Boyd, Vern E. Bean, Christopher J. Crowley

Abstract

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 proportional–integral–derivative (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.

Proceedings Title

9th International Symposium on Fluid Flow Measurement

Conference Dates

April 14-17, 2015

Conference Location

Arlington, VA

Pub Type

Conferences

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Keywords

dynamic liquid flow, liquid flow primary standard, gravimetric standard

Citation

Pope, J. , Johnson, A. , Filla, B. , Boyd, J. , Bean, V. and Crowley, C. (2015), 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 October 24, 2025)