Talking about psichrometry
Given T in Kelvin or absolute temp
For Pws [presure water steam]
Is this formula valid ?
for Water air from 0 to 200 C degree
ln Pws= a/t + b+c*t+d*t^2+e*t^3+f*lnT
for the followings values
I used it for 100 C dgree and give
p mbar 1014.217979 mbar , that is a normal atmospheric pressure
My concern is if it is valid for the air ambient temperature
I wan to calc the Relative humidity by reading the DryBulb and WETbulb temperature.
I have 2 data loggers and I modify one of them to read wet bulb temperature, so I can charge the data from it to a spread sheet and get the HR % .
maybe it is not a conventional way of doing , but is it what I have and will have for ever. (lack of money to buy a HR datalogger)
Hope you can give me any advice.
PS I have the spread sheet done.