Title :
EMF changes of Pt/Pd thermocouples at the Cu freezing point
Author :
Ogura, Hideki ; Numajiri, Haruhiko ; Izuchi, Masaya ; Arai, Masaru
Author_Institution :
Nat. Metrol. Inst. of Japan, Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba, Japan
Abstract :
The drift in EMF of Pt/Pd thermocouples during successive calibrations at the Cu freezing point was measured. The different heat treatment was performed to each thermocouple before the calibration. The magnitude of the drift of the thermocouples depended on the heat treatment. The heat treatment at 850°C or 1030°C for 100 hours resulted in reduction of the drift.
Keywords :
calibration; copper; electric potential; freezing; heat treatment; palladium; platinum; thermocouples; 100 hr; 1030 degC; 850 degC; Cu; Pd; Pt; calibrations; copper; freezing point; heat treatment; palladium; platinum; temperature drift reduction; thermocouple; Annealing; Calibration; Furnaces; Heat treatment; Heating; Metrology; Temperature measurement; Thermal stability; Wires;
Conference_Titel :
SICE 2002. Proceedings of the 41st SICE Annual Conference
Print_ISBN :
0-7803-7631-5
DOI :
10.1109/SICE.2002.1195452
