TEMPERATURE FIELD SHAPING IN SYSTEMS FOR THERMOMETRIC SENSORS CALIBRATION

M. Orzylowski, M. Hering, T. Kaluzniacki

Abstract

For the thermometric sensor calibration by the method of comparison in the range of 300°C to 1300°C a uniform temperature field should be maintained in a metal insert for each temperature level selected. The insert containing measurement pockets is located in a tubular electric furnace. The functionality of calibrating system pertaining to the time of measurement requires appropriate dynamic properties of electrothermal system. To get a suitable static temperature field in the measurement insert some real electrothermal systems of similar class were investigated and the results have been augmented with a 3–dimensional computer simulation of a tubular furnace with an insert. To obtain good dynamic properties during the calibration temperature changes a predictive controller of the insert temperature was used. The obtained accuracy enables precise calibration of industrial thermometric sensors.

Keywords

thermometric sensors, calibration, temperature field modelling, control

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IMEKO-WC-2000-TC12-P315.pdf

DOI

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IMEKO TC

TC12 - Temperature and Thermal Measurements

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