METHOD FOR TEMPERATURE DRIFT COMPENSATION OF TEMPERATURE MEASUREMENT DEVICE USING THERMOCOUPLE

摘要

PROBLEM TO BE SOLVED: To provide a method for a temperature drift compensation of a temperature measurement device using a thermocouple, which can compensate for a temperature drift through a reference junction compensation alone using a thermistor for a reference junction compensation without providing a separate temperature measurement element.;SOLUTION: The method comprises the steps of: acquiring an analog voltage of a thermistor; converting the analog voltage into a digital count; calculating the temperature difference between each temperature from an RT table and a predetermined reference room temperature; calculating a compensation factor by multiplying the temperature difference by a predetermined compensation coefficient; calculating a compensated digital count using the converted digital count and the calculated compensation factor; and finally measuring the temperature of a thermocouple through a reference junction compensation using the temperature of the thermistor corresponding to the compensated digital count.;SELECTED DRAWING: Figure 7;COPYRIGHT: (C)2017,JPO&INPIT