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1. A Comparison of 12 US Liquid Hydrocarbon Flow Standards and the Transition to Safer Calibration Liquids
Published: 4/1/2012
Authors: John D Wright, Aaron N Johnson, Gina M Kline, Christopher J. Crowley, Jodie G Pope, Vern E. Bean
Abstract: During 2010 and 2011, NIST piloted a 12-laboratory comparison of hydrocarbon liquid flow calibration standards spanning the range 3.8 L/min to 38 L/min. The laboratories were in mutual agreement within the expected 0.3 % uncertainty, which is approx ...

2. Extended Lee model for the turbine meter & calibrations with surrogate fluids
Published: 5/1/2012
Authors: Jodie G Pope, John D Wright, Aaron N Johnson, Michael R Moldover
Abstract: We developed a physical model termed the ,extended Lee modelŠ for calibrating turbine meters to account for 1) fluid drag on the rotor, 2) bearing static drag and 3) bearing viscous drag. We tested the extended Lee model using a dual rotor, 2.5 cm d ...

3. Hydrogen Field Test Standard: Laboratory Performance
Published: 4/14/2014
Authors: Jodie G Pope, John D Wright
Abstract: NIST developed a prototype field test standard (FTS) that incorporates three test methods that could be used by state weights and measures inspectors to periodically test retail hydrogen dispensers, much as gasoline dispensers are tested today. The ...

4. Liquid Flow Meter Calibrations with the 0.1 L/s and 2.5 L/s Piston Provers
Series: Special Publication (NIST SP)
Report Number: 250-1039r1
Published: 1/15/2014
Authors: Jodie G Pope, John D Wright, Aaron N Johnson, Christopher J. Crowley
Abstract: This document provides a description of the 2.5 L/s and 0.1 L/s liquid flow calibration standards operated by the National Institute of Standards and Technology (NIST) Fluid Metrology Group to provide flow meter calibrations for customers. The 0 ...

5. Liquid Piston Prover Uncertainty Analysis Spreadsheet
Series: OTHER
Published: 3/25/2014
Authors: John D Wright, Aaron N Johnson, Jodie G Pope
Abstract: This publication is a spreadsheet that calculates the mass and volume flow uncertainty for a piston prover liquid flow standard based on user inputs of component uncertainties. The calculations use the basis equation and uncertainty analysis presen ...

6. NIST's Fully Dynamic Gravimetric Liquid Flowmeter Standard.
Published: 4/13/2015
Authors: 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‹integ ...

7. Performance of Coriolis Meters in Transient Gas Flows
Published: 3/17/2014
Authors: Jodie G Pope, John D Wright
Abstract: NIST evaluated the instantaneous and totalized flow measured by two commercial coriolis meters under transient flow, pressure, and temperature conditions using a Transient Flow Facility (TFF) developed for this purpose. During a simulated cascade fi ...

8. Removing the Hydrocarbon Liquid from Hydrocarbon Liquid Flow Standards
Published: 9/24/2013
Authors: Jodie G Pope, Christopher J. Crowley
Abstract: NIST and other laboratories calibrate meters that measure the flow of valuable liquids such as petroleum products. Historically, these calibrations have been conducted using Stoddard solvent. Laboratories using Stoddard solvent for liquid-flow cali ...

9. Tests of the Extended Lee Model Using Three Different Turbine Meters
Published: 6/20/2012
Authors: Jodie G Pope, John D Wright, Sherry D Sheckels
Abstract: We report additional tests of our ,extended Lee modelŠ for calibrating turbine meters. The model accounts for 1) Reynolds number (Re) dependent drag and lift, 2) bearing static drag and 3) bearing viscous drag. Initially, we tested this model using ...

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