Fixed point crucible and apparatus for generating a fixed point - temperature, and temperature calibration method with this crucible

摘要

PROBLEM TO BE SOLVED: To achieve a fixed point in a temperature range that exceeds a copper point and attain high accuracy in calibrating every thermometer such as a radiation thermometer, a thermocouple and a thermometer used in other high temperature ranges.;SOLUTION: A temperature fixed part crucible 4 is constituted of a crucible whose component is carbon and a fixed-point material sealed in the crucible. This fixed-point material is the eutectic structure of carbon and metal. This temperature fixed crucible 4 is placed in a furnace and ambient temperature is increased or deceased. The temperature of the temperature fixed crucible 4 at this time is measured with a thermometer, and then a thermometer 9 is calibrated by the state of a temperature change measured.;COPYRIGHT: (C)2000,JPO