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*/ End of Theory
5 Math channels are required to calculate one RH.
Td = AI1, analog input for dry bulb temperature (PT100)
Tw =AI2, analog input for wet bulb temperature (PT100)
Math1 = EXP((17.269*AI1)/(AI1+237.3))
Math2 = Ed1 = 0.61078*Math1*(AI1-AI2)
Math3 = EXP((17.269*AI2)/(AI2+237.3))
Math4 = Ew1 = 0.61078*Math3*(AI1-AI2)
Ea = Ew - 0.63 * (Td - Tw)
Math5= RH1 = ((Math4-0.63*(AI1-AI2))/Math2)*100
75
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