Two-parameters Approximation Curve for NTC Resistors
Damir Ilić, Josip Butorac, Luka Ferković · 2005
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 p ; 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 (SH ; 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.