Abstract
Industrial grade platinum resistance thermometers were
calibrated in the temperature range from 200°C to 700°C .
Both wire-wound and thin-film sensor-based thermometers
were investigated. The purpose of the study was to
investigate thermometers which could be used in future
coal power plants. The calibrations were performed in a
vertical cesium heat-pipe furnace and in a horizontal and
vertical sodium heat-pipe furnace. The reference
thermometer was a standard platinum resistance
thermometer calibrated at fixed points up to the aluminum
point. In addition to calibration, various thermal tests
including immersion measurements and thermal-cycling
tests were performed. The stability of the sensors was
determined by monitoring the ice-point resistance.
Possible contamination of the sensors was determined by
measuring the resistance ratio R(30°C)/R(10°C) several
times during the measurement period. The calibration
curves were compared with the ICE 60751 standard and
International Temperature Scale 1990 (ITS-90) reference
functions. Considerable changes were found in all tested
thermometers. The wire-wound sensors were more stable
than the thin-film sensors.
Original language | English |
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Pages (from-to) | 668-680 |
Journal | International Journal of Thermophysics |
Volume | 35 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 2014 |
MoE publication type | A1 Journal article-refereed |
Keywords
- calibration
- thermometers
- temperatures