Chapter 14 ____________________________________________________ Technical Specifications
VAISALA _______________________________________________________________________ 73
Wet bulb temperature
0 ... +100 ºC, 32 ... +212 ºF
Enthalpy
0 ... 160 kJ/g
Water vapor pressure
0 ... 1000 hPa
Accuracies of Calculated Variables
Accuracies of the calculated variables depend on the calibration
accuracy of the humidity and temperature sensors; here the accuracies
are given for
±
2 %RH and ±0.2 °C
.
Accuracy of Dewpoint Temperature °C
Relative
humidity
Temp.
10
20 30 40 50 60 70 80 90 100
-40
1.86
1.03 0.76 0.63 0.55 0.50 0.46 0.43
—
—
-20
2.18
1.19 0.88 0.72 0.62 0.56 0.51 0.48
—
—
0
2.51
1.37 1.00 0.81 0.70 0.63 0.57 0.53 0.50 0.48
20
2.87
1.56 1.13 0.92 0.79 0.70 0.64 0.59 0.55 0.53
40
3.24
1.76 1.27 1.03 0.88 0.78 0.71 0.65 0.61 0.58
60
3.60
1.96 1.42 1.14 0.97 0.86 0.78 0.72 0.67 0.64
80
4.01
2.18 1.58 1.27 1.08 0.95 0.86 0.79 0.74 0.70
100
4.42
2.41 1.74 1.40 1.19 1.05 0.95 0.87 0.81 0.76
120
4.86
2.66 1.92 1.54 1.31 1.16 1.04 0.96 0.89 0.84
140
5.31
2.91 2.10 1.69 1.44 1.26 1.14 1.05 0.97 0.91
160
5.80
3.18 2.30 1.85 1.57 1.38 1.24 1.14 1.06 0.99
Accuracy of Mixing Ratio g/kg
(ambient pressure 1013 mbar)
Relative
humidity
Temp.
10 20
30 40 50 60 70 80 90 100
-40
0.003 0.003
0.003 0.003 0.003 0.004 0.004 0.004
—
—
-20
0.017 0.018
0.019 0.021 0.022 0.023 0.025 0.026
—
—
0 0.08
0.09
0.09
0.10
0.10 0.11 0.11 0.12 0.13 0.13
20 0.31 0.33
0.35
0.37
0.39 0.41 0.43 0.45 0.47 0.49
40 0.97 1.03
1.10
1.17
1.24 1.31 1.38 1.46 1.54 1.62
60 2.68 2.91
3.16
3.43
3.72 4.04 4.38 4.75 5.15 5.58
80 6.73 7.73
8.92
10.34
12.05 14.14 16.71 19.92 24.01 29.29
100
16.26 21.34
28.89 40.75 60.86 98.85 183.66
438.56
—
—
120
40.83
74.66 172.36 —
—
—
—
—
—
—
