Instruction manual
APPENDIX A. KRYPTON HYGROMETER IN WATER VAPOR MEASUREMENTS
A-3
where
T
is in Kelvin. Directly substitute Eq.
(19) into (16) and ignore the last term with order
T
−
4
. This yields Eq. (20).
()
()
()
′
=
′
−
+ρ
v
h
w
VAR
InV
xk
OC
2
2
2
(20)
where OC
VAR
is defined by Eq. (21).
()
()
OC
VAR
=−
−
′
′
2C M P
RT
k
xk
TInV
oo
2
o
w
2
h
(21)
To find the standard deviation of water vapor,
simply take the square root of Eq. (20).