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Technical Journal, Vol. 18 No. 4, 2024.

Original scientific paper

https://doi.org/10.31803/tg-20230305145101

Measurement and Modelling of the Thermal Response of the Resistance Temperature Sensors

Tomislav Barić orcid id orcid.org/0000-0002-7852-3800 ; Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, University of Osijek, Kneza Trpimira 2B, 31000 Osijek, Croatia
Hrvoje Glavaš orcid id orcid.org/0000-0002-3658-0364 ; Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, University of Osijek, Kneza Trpimira 2B, 31000 Osijek, Croatia
Laura Kuretić ; Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, University of Osijek, Kneza Trpimira 2B, 31000 Osijek, Croatia
Mirko Karakašić ; University of Slavonski Brod, Mechanical Engineering Faculty in Slavonski Brod, Trg Ivane Brlić - Mažuranić 2, 35000 Slavonski Brod, Croatia *

* Corresponding author.

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Abstract

Knowledge of the dynamic properties of thermometers is of particular importance for successful automation of process management in real time. The dynamic behaviour, i.e. the thermal response of the thermometers, is primarily determined by the thermal time constants of the thermo sensor and the protective housing in which it is located (thermo immersion probe, thermowell). In this paper, we presented a simple, but for a large number of applications acceptably accurate method of determining the thermal time constants of the temperature sensor. The procedure for determining the thermal time constants of a thermometer is shown on the example of a thermometer with a resistance temperature sensor. The paper presents the thermal model of the resistance temperature sensor and the protective housing of the sensor. By suddenly immersing the immersion probe in a container with heated water, the temperature response was recorded. Based on the presented thermal model, the thermal time constants of the temperature sensor and the protective case were determined.

Keywords

measurement; modelling; resistance temperature sensor; thermal response

Hrčak ID:

321389

URI

https://hrcak.srce.hr/321389

Publication date:

5.12.2024.

Visits: 159 *