Figure 10-14 shows the resistance measurement results. The measurements are taken at TA = 25°C. A system offset calibration is performed using shorted inputs. A system gain calibration is performed using a 390-Ω precision resistor. The data are taken using a precision resistor simulator with a 3-wire connection in place of a 3-wire RTD. Note that the measurement data are in ohms and do not include the error of the RTD sensor itself. The measured resistance error is < ±0.02 Ω over the 20-Ω to 400-Ω range.