
Saturation vapor pressure
( )
SVP TT C e
C TT
C TT
=
+
1
2
3
*
*
by MAGNUS (1)
Actual Vapor Pressure VP
( ) ( )
VP SVP HT C SP TT HT
= − −
* *
by SPRUNG (2)
Rel. humidity RF from dry- and wet bulb t-.emperature
(3)
Dew point temperature DT
a) Dew point from psychrometric measurement (dry- and wet
bulb temperature)
(4)
b) Dew point from rel. humidity and air temperature
DT C
RF
SV P
C
C RF
SVP
C
=
−
3
1
2
1
0 01
0 01
ln . * *
ln . * *
(5)
Hardware Manual COMBILOG 1022
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