Method and apparatus for sensing a cold junction temperature

Details Method and apparatus for sensing a cold junction temperature Method and apparatus for sensing a cold junction temperature

1993-12-28

1996-01-16

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

374134, 374178, 374112, 374113, G01K 713, G01K 701, G01K 116

Patent

active

054842069

ABSTRACT:
An improved method and apparatus for sensing a cold junction temperature, wherein two sensors are located near the cold junction temperature, the temperatures at the two sensors are measured, the heat flow between the two sensors and one of the two sensors and the cold junction is constrained to be equal, and the thermal impedances between each of the two sensors and the cold junction is maintained constant. The cold junction temperature is a weighted difference of the two temperatures at the two sensors and the weighting factor depends on the ratio of the thermal impedance between the two sensors and the thermal impedance between the first sensor and the cold junction.

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