Title :
Emf changes of the Pt/Pd thermocouples at the freezing point of silver
Author :
Numajiri, Haruhiko ; Ogura, Hideki ; Izuchi, Masaya ; Arai, Masaru
Author_Institution :
Nat. Metrol. Inst. of Japan, Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba, Japan
Abstract :
Emf change is a serious problem in the thermocouple calibration. In this paper, Pt/Pd thermocouples have been made using single lot of wire under various heat treatments, and their emf changes have been measured at the freezing point of silver. Heat treatment at temperatures between 850/spl deg/C and 1030/spl deg/C has shown that the change in the emf of the thermocouple has been prevented.
Keywords :
calibration; electric potential; freezing; heat treatment; palladium; platinum; silver; thermocouples; 850 to 1030 degC; Ag; EMF; Pt-Pd; Pt-Pd thermocouples; freezing point; heat treatments; silver; thermocouple calibration;
Conference_Titel :
SICE 2003 Annual Conference
Conference_Location :
Fukui, Japan
Print_ISBN :
0-7803-8352-4
