消耗型イマージョン熱電対の高温検定法

概要

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At present, an expendable type immersion thermocouple is used to measure the temperature of steel bath, but such a thermocouple has been used without any proper checking method up to now and therefore, an establishment of a high temperature calibration method of expendable type immersion thermocouple. There was made a test of the following two calibration methods as the checking methods for the thermocouple.(1) The U-tube calibration method which is to do the Pd point calibration without taking the thermocouple out of the silica U-tube.(2) The element wire calibration method which is to do the Pd point calibration taking the thermocouple out of the silica U-tube.After the results, it was confirmed that the latter method enables us to obtain higher calibration accuracy and the calibration operation is much easier than the former.
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