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You searched on: Author: christopher meyer

Displaying records 11 to 20 of 41 records.
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11. Adjustments to the NIST Realization of the ITS-90 from 5 K to 24.5561 K
Published: 5/1/2008
Authors: Weston Leo Tew, Christopher W Meyer
Abstract: Recent clarifications issued by the Consultative Committee on Thermometry (CCT) for the definitions of the equilibrium hydrogen (e-H2) triple points (TPs) and vapor-pressure points (VPs) have resulted in adjustments to the NIST-disseminated ITS-90 (T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832258

12. Automated Continuous-Flow Gravimetric Hygrometer as a Primary Humidity Standard
Published: 5/1/2008
Authors: Christopher W Meyer, Joseph Terence Hodges, R W. Hyland, Gregory E Scace, J Valencia-Rodriguez, James R Whetstone
Abstract: A new primary gravimetric hygrometer has been completed at the National Institute of Standards and Technology (NIST). This apparatus determines the humidity in a steadily flowing gas stream by first separating the water from the carrier gas using de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830962

13. Conformational Temperature Dependence of a Poly(ethylene-co-acrylic acid) Stationary Phase Investigated by Nuclear Magnetic Resonance Spectroscopy and Liquid Chromatography
Published: 11/1/2006
Authors: Lane C Sander, Christopher W Meyer, Stephen A Wise, O. Pascui, K. Albert
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904389

14. Determination of SPRT Realization Uncertainties Between Points
Published: 9/6/2006
Authors: Christopher W Meyer, Dean C Ripple
Abstract: Calibrated Standard Platinum Resistance Thermometers (SPRTs) are used to realize the International Temperature Scale of 1990 (ITS-90) from 13.8033 K to 1234.93 K. The SPRTs are calibrated at a series of fixed points, each assigned a temperature on ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830953

15. ITS-90 Non-Uniqueness From PRT Subrange Inconsistencies Over the Range 24.56 K to 273.16 K
Published: 9/1/2006
Authors: Christopher W Meyer, Weston Leo Tew
Abstract: Calculations have been performed to study ITS-90 non-uniqueness over the range 24.5561 K to 273.16 K, where the scale is defined by an interpolating platinum resistance thermometer (PRT) that is calibrated via sets of defined fixed points. Over this ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830960

16. Temperature Measurements of Microhotplates Using Fluorescence Thermometry
Published: 3/1/2006
Authors: Christopher W Meyer, Douglas C Meier, Christopher B Montgomery, Stephen Semancik
Abstract: A fluorescence microscope has been constructed for measuring surface temperatures of microhotplate platforms. The microscope measures temperature-dependent fluorescence lifetimes of a film of the phosphor Mg4(F)GeO6:Mn which is deposited on the micr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830927

17. CCT Key Comparison No 1 (CCT-K1): Realisations of the ITS-90, 0.65 K to 24.5561 K, Using Rhodium-Iron Resistance Thermometers
Published: 6/1/2004
Authors: R L Rusby, Christopher W Meyer, Weston Leo Tew, D I Head, K D Hill, O Tamura, P A. de Groot, B Fellmuth, A Storm, A Peruzzi, J Engert, D N Astrov, Y Dedikov, G A Kytin
Abstract: At its meeting in 1996 the CCT initiated five Key Comparisons to test the equivalence of realisations of the ITS-90 between National Measurement Institutes. CCT-K1 covers the temperature range from 0.65 K to 24.5561 K, in which the ITS-90 is defined ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830884

18. Calibration of Radiation Thermometers in Rapid Thermal Processing Tools Using Si Wafers with Thin Film Thermocouples
Published: 10/1/2003
Authors: Kenneth Gruber Kreider, William Andrew Kimes, Christopher W Meyer, Dean C Ripple, Benjamin K Tsai, D H Chen, D P DeWitt
Abstract: Rapid thermal processing (RTP) tools are currently monitored and controlled with lightpipe radiation thermometers (LPRTs) which have been calibrated with thermocouple instrumented wafers. We have developed a thin-film thermocouple wafer that enables ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830794

19. A Four-Zone Furnace for Realization of Silver and Gold Freezing Points
Published: 9/1/2003
Authors: Dean C Ripple, K Garrity, Christopher W Meyer
Abstract: Recently, the Thermocouple Calibration Laboratory at the National Institute of Standards and Technology has used sodium heat-pipe furnaces for the realization of ITS-90 freezing points of aluminum, silver, and gold. When using a fixed-point cell moun ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830843

20. Recent Results of NIST Realizations of the ITS-90 Below 84 K
Published: 1/1/2003
Authors: Weston Leo Tew, Christopher W Meyer
Abstract: The results at NIST of realizations and comparisons of the ITS-90 below 84 K are presented. The 3He and 4He vapor pressure scales (0.65 K to 5.0 K), and the interpolating constant volume gas thermometer (ICVGT) scale (5.0 K to 24.556 K) as realized f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830804



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