A new method of dynamically calibrating temperature sensor to be checked was presented by a dynamic calibration system, which takes a high frequency modulated high power C〇2 laser as heat source and makes radiation thermometer, i.e. infrared detector, calibrated statically. For frequency- response characteristic of high speed radiation thermometer surpasses that of the temperature sensor, it can be used as the reference value to calibrate the latter and let the system error be corrected, to avoid the errors caused by the difference environment of installed sensor and the change of thermo- physical property and solve the difficult problem of traceable dynamic calibration of temperature sensor. CHAL- 010 thermocouple made in U.S. OMEGA Co. was calibrated dynamically by the method wmch has better repeatability to obtain its time constant and corrected value of dynamic temperature measuring error.
Key words
technology of instrument and meter /
thermocouple /
surface-temperature /
dynamic-bration /
response time
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Footnotes
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