The Function For Temperature Value Acquisition (C++)
The following code estimates a Pt100 or Pt1000 sensor's temperature from its current resistance (input parameter r).
float GetPt100Temperature(float r) { float const Pt100 = { 80.31, 82.29, 84.27, 86.25, 88.22, 90.19, 92.16, 94.12, 96.09, 98.04, 100.0, 101.95, 103.9, 105.85, 107.79, 109.73, 111.67, 113.61, 115.54, 117.47, 119.4, 121.32, 123.24, 125.16, 127.07, 128.98, 130.89, 132.8, 134.7, 136.6, 138.5, 140.39, 142.29, 157.31, 175.84, 195.84 }; int t = -50, i = 0, dt = 0; if (r > Pt100) while (250 > t) { dt = (t < 110) ? 5 : (t > 110) ? 50 : 40; if (r < Pt100) return t + (r - Pt100) * dt / (Pt100 - Pt100); t += dt; }; return t; } float GetPt1000Temperature(float r) { return GetPt100Temperature(r / 10); }Read more about this topic: Resistance Thermometer
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