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Author: gregory strouse

Displaying records 11 to 20 of 46 records.
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11. Acoustic Thermometry Results From 271 K to 552 K
Published: 9/8/2007
Authors: Dean C Ripple, Gregory F Strouse, Michael R Moldover
Abstract: The NIST Acoustic Thermometer determines the thermodynamic temperature from measurements of ratios of the speed of sound of argon in a spherical cavity. We report recent results for T - T90 on 12 isotherms spanning the range 271 K to 552 K. (T is th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831005

12. Selection of Alternatives to Liquid-in-Glass Thermometers
Published: 10/1/2005
Authors: Dean C Ripple, Gregory F Strouse
Abstract: A desire to increase automation or to eliminate the use of mercury has prompted several ASTM committees to consider alternatives to ASTM Liquid-in-Glass (LiG) thermometers. In this paper, we address the technical issues of choosing an alternative. W ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830919

13. NIST Realization of the ITS-90 Gallium Fixed Point
Published: 8/1/2005
Author: Gregory F Strouse
Abstract: As defined by the International Temperature Scale of 1990 (ITS-90), the gallium melting-point cell (29.7646 C) is used in the calibration of standard platinum resistance thermometers (SPRTs) for the ITS-90 subranges from 39 C to 30 C and from 0 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830932

14. Stabilization of SPRTs for ITS-90 Calibrations
Published: 8/1/2005
Authors: Dennis Brooke Minor, Gregory F Strouse
Abstract: At the National Institute of Standards and Technology (NIST), the ITS-90 calibration of standard platinum resistance thermometers (SPRTs) is performed in the Platinum Resistance Thermometer Calibration Laboratory over the temperature range from -189 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830930

15. NIST Certification of ITS-90 Fixed-Point Cells From 83.8058 K to 1234.93 k: Methods and Uncertainties
Published: 1/1/2005
Author: Gregory F Strouse
Abstract: The certification of ITS 90 fixed-point cells from the Ar triple point (83.8058 K) to the Ag freezing point (1234.93 K) is an integral part of the calibration services offered by the NIST Thermometry Group. This service is used to qualify new fixed-p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830876

16. Standard Reference Material 1751 - A Gallium Melting-Point Standard
Published: 8/1/2004
Author: Gregory F Strouse
Abstract: The melting point of gallium %2829%2E7646%B0C%29 is a defining thermometric fixed point of the International Temperature Scale of 1990 %28ITS%2D90%29%2E Realization of this melting point is performed using a fixed%2Dpoint cell containing high%2Dpuri ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830886

17. Internal Measurement Assurance for the NIST Realization of the ITS-90 from 83.8 K to 1234.93 K
Published: 10/1/2003
Author: Gregory F Strouse
Abstract: The National Institute of Standards and Technology (NIST) is responsible for realizing, maintaining, and disseminating the International Temperature Scale of 1990 (ITS-90) to the United States of America. The ITS-90 fixed-point cells necessary to cal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830792

18. Performance Assessment of Resistance Ratio Bridges used for the Calibration of SPRTs
Published: 10/1/2003
Authors: Gregory F Strouse, K D Hill
Abstract: Automatic balancing dc and ac resistance ratio bridges are the primary measurement devices used by National Measurement Institutes for the calibration of standard platinum resistance thermometers (SPRTs) on the International Temperature Scale of 1990 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830788

19. NIST Calibration Uncertainties of Liquid-in-Glass Thermometers over the Range from 20 C to 400 C
Published: 9/1/2003
Authors: C D Vaughn, Gregory F Strouse
Abstract: The NIST Industrial Thermometer Calibration Laboratory (ITCL) is responsible for calibrating several different types of industrial thermometers. One of those types is a liquid-in-glass (LiG) thermometer, which includes both mercury (partial and tota ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830819

20. Progress in Primary Acoustic Thermometry at NIST: 273 K to 505 K
Published: 9/1/2003
Authors: Gregory F Strouse, Dana R Defibaugh, Michael R Moldover, Dean C Ripple
Abstract: The NIST Acoustic Thermometer determines the thermodynamic temperature by measuring the speed of sound of argon in a spherical cavity. We obtained the thermodynamic temperature of three fixed points on the Interna-tionalTemperature Scale of 1990: the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830838



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