Title :
Maintenance and validation of a resistance ratio chain for platinum resistance thermometry
Author :
Tew, W.L. ; Strouse, G.F.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
Abstract :
A simple method for establishing a resistance ratio chain used in precision resistance thermometry is described. The chain consists of a group of AC resistance standards, maintained with known resistance ratios, to span a range of thermometer resistance ratios from 0.00119 to 1.0 as required for platinum resistance thermometry between 13.8033 K and 273.16 K.
Keywords :
calibration; electric resistance measurement; measurement uncertainty; platinum; resistance thermometers; temperature scales; 13.8033 to 273.16 K; AC resistance standards; ITS-90; Pt; SPRT resistance; calibration; maintenance; precision resistance thermometry; resistance ratio chain; thermometer resistance ratios; uncertainties; Bridge circuits; Calibration; Electrical resistance measurement; Laboratories; Measurement standards; NIST; Platinum; Resistors; Temperature distribution; Thermal resistance;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.699801
