# init graph
  set grid
  #set log y
  #set format y "%.1e"
  set timefmt "%s"
  set format x "%y/%m/%d - %H:%M:%S"
  set xdata time
  set xtics rotate by 90 right
  
  
  # set res2temp functions
  res2temp627(R) = 0.399341181655472610 + 10.8420092277810909 * (1000./R) + -26.4597939187660813 * (1000./R)**2 + 245.9828566655493379 * (1000./R)**3 + -668.069876596331596 * (1000./R)**4 + 1001.69882618263364 * (1000./R) **5 + -267.272089680656791 * (1000./R)**6
  res2temp625(R) = 0.333548856582638109 + 11.7361551595386118 * (1000./R) + -31.32988932320903987 * (1000./R)**2 + 262.878643524833024 * (1000./R)**3 + -704.163538021035492 * (1000./R)**4 + 1056.6040485650301 * (1000./R)**5 + -307.057196729816496 * (1000./R)**6
  res2temp628(R) = 0.463200932294057566 + 13.5049710820894688 * (1000./R) + -30.5191222755238414 * (1000./R)**2 + 231.098593852017075 * (1000./R)**3 + -550.122691885568202 * (1000./R)**4 + 806.038547554984689 * (1000./R)**5 + -198.510489917360246 * (1000./R)**6
  res2temp16945(R) = 10**(3.2497 * (log10(1000./R))**2 + 5.1777 * log10(1000./R) + 2.499)
  res2temp16943(R) = 10**(3.4738 * (log10(1000./R))**2 + 5.1198 * log10(1000./R) + 2.3681)
  res2temp16944(R) = 10**(3.3674 * (log10(1000./R))**2 + 5.2874 * log10(1000./R) + 2.5165)
  res2temp16941(R) = 10**(2.9486 * (log10(1000./R))**2 + 4.5862 * log10(1000./R) + 2.266)
  res2temp16947(R) = 10**(3.4597 * (log10(1000./R))**2 + 5.2422 * log10(1000./R) + 2.4169)
  pt100(R) = (R/100.-1)/0.003850+273.15
  
  A = 0.0012146
  B = 0.00021922
  C = 0.00000015244
  
  ntc10k(R) = 1/( A + B*log(R) + C*log(R)**3)-273.15