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Search Publications by: Gregory F. Strouse (Fed)

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Displaying 51 - 71 of 71

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

Investigation of the Non-Uniqueness of the ITS-90 in the Range 660 C to 962 C

June 1, 2001
Author(s)
G T. Furukawa, Gregory F. Strouse
Preliminary results are reported on the non-uniqueness of the ITS-90 using high temperature SPRTs (HTSPRTs) in the range 660 C to 962 C. To achieve temperature stability and uniformity of the test HTSPRTs, the method employs the thermal isolation of the

New NIST Mercury Triple-Point Cells

June 1, 2001
Author(s)
Gregory F. Strouse, J Lippiatt
Six new Hg triple-point (TP) cells (234.3156 K) were manufactured in the NIST PRT Laboratory for use in the realization of the International Temperature Scale of 1990 (ITS90). The fixed-point cells consisted of both glass and stainless steel designs with

Small Fixed-Point Cells for Use in Dry Well Block Calibrators

June 1, 2001
Author(s)
Gregory F. Strouse
As part of a research project for the Combined Calibration Group (CCG) of the U.S. Armed Forces, three rugged fixed-point cells were developed for use in dry well block calibrators (DWBCs). The small fixed-point cells of the water triple point (0.01 C)

The NIST Industrial Thermometer Calibration Laboratory

June 1, 2001
Author(s)
C D. Vaughn, Gregory F. Strouse
The NIST Industrial Thermometer Calibration (ITC) Laboratory provides calibrations of industrial thermometers over the range from 196 C to 550 C. The different types of thermometers include liquid-in-glass (LiG), thermistors, thermocouples (

The Kelvin and Temperature Measurements

January 1, 2001
Author(s)
Billy W. Mangum, G T. Furukawa, Kenneth G. Kreider, Christopher W. Meyer, Dean C. Ripple, Gregory F. Strouse, Weston L. Tew, Robert D. Saunders, Bettye C. Johnson, Howard W. Yoon, Michael R. Moldover, Charles E. Gibson
The International Temperature Scale of 1990 (ITS90) is defined from 0.65 K upwards to the highest temperature measurable by spectral radiation thermometry, the radiation thermometry being based on the Planck radiation law. Part I of this paper describes

NIST Realization of the Gallium Triple Point

November 1, 1999
Author(s)
Gregory F. Strouse
The gallium trip point (302.9166 K) instead of the gallium melting point (302.9146 K) is used at NIST in the realization of the International Temperature Scale of 1990 (ITS-90). Four different sources of gallium with purities of at least 99.999 995% were

Non-Uniquenes of the ITS-90 From 13.8033 K to 24.5561 K

June 1, 1999
Author(s)
Christopher W. Meyer, Gregory F. Strouse, Weston L. Tew
The International Temperature Scale of 1990 (ITS-90) is defined in the region 3.0 K to 24.5561 K by an interpolating constant volume gas thermometer (ICVGT) that is calibrated at three specified fixed points. From 13.8033 K to 1234.93 K the ITS-90 is

Standard Reference Materials: Tin Freezing-Point Standard - SRM 741a

June 1, 1999
Author(s)
Gregory F. Strouse, N P. Moiseeva
The freezing point of tin (231.928 degrees C) is a defining fixed point of the International Temperature Scale of 1990 (ITS-90). Realization of this freezing point is performed using a fixed-point cell containing high-purity ({> or =} 99.9999 % pure) tin