The article discusses an actual problem of increasing the accuracy of temperature measurement using resistance thermometers (RTs) and considers the existing methods for reducing the errors of these measurements. A method for increasing the accuracy of temperature measurement with a two-wire connection of a RT has been analyzed. The additional error in temperature measurements was due to the resistance of the line connecting the measuring circuit with the RT. The reduction of additional errors in a two-wire connection was achieved by by-passing the RT with a capacitor and pulsed power supply to the measuring circuit. The temperature measurement error obtained by the investigated method is comparable to the measurement error using three- and four-wire connections. The method efficiency was confirmed by the results of experimental studies on a specially designed stand with the author’s software. The method can be applied in any industrial temperature control systems.
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Translated from Izmeritel’naya Tekhnika, No. 3, pp. 53–58, March, 2022.
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Bondar, O.G., Brezhneva, E.O. & Kalmykov, A.I. Increasing Temperature Measurement Accuracy: Method of Two-Wire Connection of a Resistance Thermometer. Meas Tech 65, 206–212 (2022). https://doi.org/10.1007/s11018-022-02070-z
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DOI: https://doi.org/10.1007/s11018-022-02070-z