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Displaying 126 - 150 of 160

Standard Reference Material 1749: Au/Pt Thermocouple Thermometer

March 1, 2002
Author(s)
Dean C. Ripple, G W. Burns
Standard Reference Material (SRM) 1749 is a lot of 18 specially-constructed gold versus platinum (Au/Pt) thermocouple thermometers, each calibrated on the International Temperature Scale of 1990 (ITS-90) and supplied with integral lead wires and a

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

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 60. NIST ITS-90 Thermocouple Database

December 21, 1999
Author(s)
Dean C. Ripple
This database fully reproduces the tables of NIST Monograph 175, Temperature-Electromotive ForceReference Functions and Tables for the Letter-Designated Thermocouple Types Based on the ITS-90, by Burns, Scroger, Strouse, Croarkin, and Guthrie.These

Calibration of Thin-Film Thermocouples on Silicon Wafers

June 1, 1999
Author(s)
Kenneth G. Kreider, Dean C. Ripple, D P. DeWitt
Thin-film thermocouples (TFTCs) can be fabricated from a much broader range of electrical conductors than wire thermocouples, but even with the same composition as the wire thermocouple, the TFTCs may have different thermoelectric coefficients. Also, the

Dynamic Contact Angle of a Liquid Spreading on a Heated Plate

June 1, 1999
Author(s)
Dean C. Ripple
An equation determining the steady-state profile of a liquid meniscus advancing or receding across a heated plate is derived. The effects of liquid evaporation, intermolecular interaction with the plate, and thermocapillarity are included. Numerical and

Primary Acoustic Thermometer for Use Up to 800 K

April 1, 1999
Author(s)
Dean C. Ripple, Dana R. Defibaugh, Keith A. Gillis, Michael R. Moldover
Primary acoustic thermometers determine the thermodynamic temperature of a monatomic gas from measurements of the speed of sound in the gas. Here, we describe the design and construction of an acoustic thermometer designed to operate at temperatures up to

Determination of the Seebeck Coefficient of Thin-Film Thermocouples

May 1, 1998
Author(s)
Kenneth G. Kreider, Dean C. Ripple, D P. DeWitt
Thin-film thermocouples have been found useful in numerous applications ranging from thermal convertors, heat flux gages, and thermopiles to surface temperature sensors for turbine engine blades and diesel engine cylinders. Because of their small size
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