Abstract
| Original language | English |
|---|---|
| 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 |
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Keywords
- calibration
- thermometers
- temperatures
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Calibration of industrial platinum resistance thermometers up to 700°C. / Hahtela, O.; Heinonen, M.; Kajastie, H.; Ojanen, M.; Riski, K. (Corresponding Author); Strnad, R.
In: International Journal of Thermophysics, Vol. 35, No. 3-4, 2014, p. 668-680.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Calibration of industrial platinum resistance thermometers up to 700°C
AU - Hahtela, O.
AU - Heinonen, M.
AU - Kajastie, H.
AU - Ojanen, M.
AU - Riski, K.
AU - Strnad, R.
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
KW - calibration
KW - thermometers
KW - temperatures
U2 - 10.1007/s10765-014-1588-2
DO - 10.1007/s10765-014-1588-2
M3 - Article
VL - 35
SP - 668
EP - 680
JO - International Journal of Thermophysics
JF - International Journal of Thermophysics
SN - 0195-928X
IS - 3-4
ER -