Abstract
PRTs are often used for precise measurements of temperature difference in laboratories and industrial installations. For the range between 0 °C to 661 °C Standard EN 60751 defines the equation for PRT resistance vs temperature relation as quadratic equation. Therefore calculations characteristics of the temperature difference measured as two resistances of the two thermometers implies calculation the roots of many quadratic equations. This paper presents method for calculations allowing engineer to calculate in the first step, with a short simple program, crucial points on the error characteristics of every selected pair of PRTs. User can than choose a best application range for temperature and for temperature difference range and calculate values of errors in those ranges.
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References
European Standard EN 60751 (IEC Publication 751) Industrial platinum resistance thermometer sensors
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Goszczynski, T.: Measuring Instrument for errors of platinum resistance thermometers pairs P-389244 – Patent Office RP
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Goszczyński, T. (2017). New Method for Calculation the Error of Temperature Difference Measurement with Platinum Resistance Thermometers (PRT). In: Szewczyk, R., Kaliczyńska, M. (eds) Recent Advances in Systems, Control and Information Technology. SCIT 2016. Advances in Intelligent Systems and Computing, vol 543. Springer, Cham. https://doi.org/10.1007/978-3-319-48923-0_45
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DOI: https://doi.org/10.1007/978-3-319-48923-0_45
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