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Search Publications by: Gregory F. Strouse (Fed)

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Displaying 76 - 100 of 140

NIST Realization of the ITS-90 Gallium Fixed Point

August 1, 2005
Author(s)
Gregory F. Strouse
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 C to 30 C

Stabilization of SPRTs for ITS-90 Calibrations

August 1, 2005
Author(s)
Dennis B. Minor, Gregory F. Strouse
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 C to

Standard Reference Material 1751 - A Gallium Melting-Point Standard

August 1, 2004
Author(s)
Gregory F. Strouse
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%2Dpurity

Progress in Primary Acoustic Thermometry at NIST: 273 K to 505 K

September 1, 2003
Author(s)
Gregory F. Strouse, Dana R. Defibaugh, Michael R. Moldover, Dean C. Ripple
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

Techniques for Primary Acoustic Thermometry to 800 K

September 1, 2003
Author(s)
Dean C. Ripple, Dana R. Defibaugh, Michael R. Moldover, Gregory F. Strouse
The NIST Primary Acoustic Thermometer will measure the difference between the International TemperatureScale of 1990 and the Kelvin Thermodynamic Scale throughout the range 273 K to 800 K with uncertainties of only afew millikelvins. The acoustic

Summary of Comparison of Realizations of the ITS-90 Over the Range 83.8058 K to 933.473 K: CCT Key Comparison CCT-K3

April 1, 2002
Author(s)
Billy W. Mangum, Gregory F. Strouse, William F. Guthrie, R Pello, M F. Stock, E Renaot, Y Hermier, G Bonnier, P Marcarino, K S. Gam, K H. Kang, Y G. Kim, J V. Nicholas, D. R. White, T D. Dransfield, Y Duan, Y Qu, J Connolly, R L. Rusby, J Gray, G J. Sutton, D I. Head, K D. Hill, A G. Steele, K Nara, Tony J. Tegeler, U Noatsch, D Heyer, B Fellmuth, B Thiele-Krivoj, S Duris, A I. Pokhodun, N P. Moiseeva, A G. Ivanova, P A. de Groot, J F. Dubbeldam
This is a report to the Comite Consultatif de Thermometrie (CCT) on Key Comparison 3, i.e., the comparison of realizations of the ITS-90 over the range 83.8058 K to 933.473 K. The differences in the realizations of the various fixed points in this range of

The Role of High-purity Noble Metals in Precision Thermometry

November 1, 2001
Author(s)
Dean C. Ripple, Gregory F. Strouse, Weston L. Tew
A variety of alternate calibration schemes which approximate the ITS-90 are possible when using high-purity noble metals. The high purity of the sensor materials allows the use of correlations that exist between the measured properties at fixed point