Correction functions for my self-built temperature and relative humidity sensors. Probably not very useful for others.
Corrections as recommended by the manufacturers:
Relative humidity sensor
added temperature correction for Honeywell HIH-4000 relative humidity sensor
Honeywell, Golden Valley, MN, USA
True RH = (Sensor RH)/(1.0546 – 0.00216T), T in ºC
For temperature correction of relative humidity
Const Humcor_a = 1.0546
Const Humcor_b = 0.00216
Temperature sensor IST TSic 301 (IST AG, Wattwil, Switzerland)
implementing equation from manual
'T = Sig[V] * (HT - LT)+ LT [°C]
'LT = -50, 2 HT = 150 as standard value for the temperature calculation
After that, a cross-comparison between high-quality sensors and these self-built ones were performed. The resulting corrections are provided in the R-package.