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Author: gregory strouse

Displaying records 21 to 30 of 53 records.
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21. 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 ...

22. 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 ...

23. 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 ...

24. 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 ...

25. 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 ...

26. 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 ...

27. 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 ...

28. Techniques for Primary Acoustic Thermometry to 800 K
Published: 9/1/2003
Authors: Dean C Ripple, Dana R Defibaugh, Michael R Moldover, Gregory F Strouse
Abstract: 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 the ...

29. NIST Methods of Estimating the Impurity Uncertainty Component for ITS-90 Fixed-Point Cells from the Ar TP to the Ag FP
Published: 4/1/2003
Author: Gregory F Strouse
Abstract: The NIST Platinum Resistance Thermometry Laboratory uses International Temperature Scale of 1990 (ITS-90) fixed-point cells to calibrate standard platinum resistance thermometers as ITS-90 defining standards. One important component of uncertainty in ...

30. Summary of Comparison of Realizations of the ITS-90 Over the Range 83.8058 K to 933.473 K: CCT Key Comparison CCT-K3
Published: 4/1/2002
Authors: Billy Wilson 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
Abstract: 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 r ...

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