Naslov
Two-parameters Approximation Curve for NTC Resistors

Autori
Ilić, Damir ; Butorac, Josip ; Ferković, Luka

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 14th International IMEKO TC4 Symposium / Mindykowski, Janusz ; Tarasiuk, Tomasz - Gdynia : International Measurement Confederation (IMEKO), 2005, 482-487

Skup
14th International IMEKO TC4 Symposium

Mjesto i datum
Gdynia, Poljska, 12.09.2005. - 15.09.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
NTC resistors; approximation curve

Sažetak
The table data for R-T dependence of NTC resistors (NTCRs), which have resistance RN = 10000 W at a temperature of 25 °C and limits of error &plusmn ; ; 0, 2 °C in the range (0 to 70) °C [1-4], are analysed. The determination of two approximation curves is described: a three-parameters (abbreviated as AC1) and a two-parameters (AC2). These curves are compared with the three-parameters Steinhart-Hart equation (S&H) by using the table data of resistance for different NTCRs and calculating the following for all of them: unknown parameters by the least-squares method, approximated temperature using determined parameters, and the difference to the table data of temperature. The obtained results are presented, which show a very good agreement of curves, with their mutual differences within a few millikelvin, and the differences to the table data within &plusmn ; ; 15 mK for the range (0 to 70) °C. Therefore, presented two-parameters approximation curve AC2 can be very convenient for the use with some NTCRs for the calculation of unknown temperature from the measured resistance.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA