| /Designs/Tools/reflow2/DOC/calibration/plot.gp |
|---|
| 0,0 → 1,17 |
| set terminal png |
| set output "temperature.png" |
| set key under |
| set xlabel "ADC value [-]" |
| set ylabel "Temperature [°C]" |
| f(x)= k*x + q |
| fit f(x) "calibration_data.txt" using 2:1 via k,q |
| # from http://hw.cz/docs/mereni_teploty/mereni_teploty_1.html/ |
| A=3.90802e-3 |
| B=-5.802e-7 |
| g(x)=(-A + sqrt(A*A - 4*B*(1.0 - 1.0*x*2350.0/1024.0/1000.0)))/2.0/B; |
| plot "calibration_data.txt" using 2:1 with points title "measured points", f(x) title "0.674201 * x - 294.35", g(x) title "original hw.cz" |