| Autor: |
Hahtela, Ossi, Heinonen, Martti, Kajastie, Heikki, Ojanen, Maija, Riski, K., Strnad, R. |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Hahtela, O, Heinonen, M, Kajastie, H, Ojanen, M, Riski, K & Strnad, R 2014, ' Calibration of industrial platinum resistance thermometers up to 700°C ', International Journal of Thermophysics, vol. 35, no. 3-4, pp. 668-680 . https://doi.org/10.1007/s10765-014-1588-2 |
| DOI: |
10.1007/s10765-014-1588-2 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
