An Instrument for Gravimetric Calibration of Flow Devices with Corrosive Gases

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Description

An instrument was developed for the direct mass flow calibration of gas flowmeters that does not require measurement of temperature, pressure, or specific volume. This instrument measures the weight of gas collected in a container and makes measuring those thermodynamic variables unnecessary. The need to measure the weight of the gas container is eliminated by submerging it in a liquid (presently water) and balancing its weight with the force of buoyancy. The accuracy of this Gravimetric Calibrator is unaffected by the pressure and temperature of the gas. The Calibrator can also measure reactive, corrosive, and non-ideal gases. The container remains ... continued below

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10 pages

Creation Information

Hylton, J. O. & Remenyik, C. J. June 27, 1999.

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Description

An instrument was developed for the direct mass flow calibration of gas flowmeters that does not require measurement of temperature, pressure, or specific volume. This instrument measures the weight of gas collected in a container and makes measuring those thermodynamic variables unnecessary. The need to measure the weight of the gas container is eliminated by submerging it in a liquid (presently water) and balancing its weight with the force of buoyancy. The accuracy of this Gravimetric Calibrator is unaffected by the pressure and temperature of the gas. The Calibrator can also measure reactive, corrosive, and non-ideal gases. The container remains connected to the process by a torsion capillary, and a load cell measures the changing gas weight continuously throughout the measuring process. A prototype was designed for gas flows ranging from 1 sccm of hydrogen to 10,000 sccm of tungsten hexafluoride, constructed, tested, and used to calibrate flow devices. Experience with the prototype and results are presented, and plans for further developments are discussed.

Physical Description

10 pages

Source

  • 4th International Symposium on Fluid Flow Measurement, Denver, CO, June 27-30, 1999

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  • Other: DE00007631
  • Report No.: ORNL/CP-102510
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 7631
  • Archival Resource Key: ark:/67531/metadc724535

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • June 27, 1999

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 15, 2016, 12:23 p.m.

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Hylton, J. O. & Remenyik, C. J. An Instrument for Gravimetric Calibration of Flow Devices with Corrosive Gases, article, June 27, 1999; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc724535/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.