100.17 Ω, and the resistance at 40 °C would be 115.71. The measured ratio R
s
/R
0
is 1.1551; the
actual ratio is 115.54/100 = 1.1554. The temperature computed by
PRTCalc()
from the
measured ratio would be about 0.1 °C lower than the actual temperature of the PRT. This source
of error does not exist in a 4-wire half bridge where a differential measurement is used to directly
measure the voltage across the PRT.
3WHB10K 3-Wire Half Bridge Terminal Input Module
10
