Title :
Realization of the triple points of the International Temperature Scale of 1990 below 84 K at the National Research Council of Canada
Author_Institution :
Inst. for Nat. Meas. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
In the temperature region from 13.8 K to 83.8 K, the International Temperature Scale of 1990 (ITS-90) defines a set of thermodynamic fixed points which are used to calibrate an interpolating instrument which then carries the scale for use in the laboratory. The NRC realization of this portion of the ITS-90 will be discussed, with particular attention paid to the cryostat design and the quality of the triple point measurements.
Keywords :
critical points; cryostats; temperature scales; 13.8 to 83.8 K; Canada; ITS-90; International Temperature Scale; National Research Council; calibration; cryostat; interpolating instrument; thermodynamic fixed point; triple point measurement; Argon; Councils; Electrical resistance measurement; Hydrogen; Instruments; Network address translation; Performance evaluation; Pressure measurement; Temperature control; 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.1998.699879
