Accuracy of mixing ratio (g/kg), Accuracy of absolute humidity (g/m3) – Vaisala HMP230 User Manual
Page 78
HMP230 SERIES
User's Guide
M210225en-B
72
Typical ranges - HMP233/234/235/237/238
dewpoint temperature
-40...+100 °C
mixing ratio
0...500 g/kg dry air
absolute humidity
0...600 g/m
3
wet bulb temperature
0...+100 °C
enthalpy
-40…+1500 kJ/kg
Accuracies of the calculated quantities depend on the accuracies of the meas-
ured quantities: relative humidity and temperature. In the tables below their
accuracies are ±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)
when ambient pressure is 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
-
-
-
-
-
-
-
Accuracy of absolute humidity (g/m3)
Relative humidity
Temp.
10
20
30
40
50
60
70
80
90
100
-40
0.004
0.004
0.005
0.005
0.005
0.006
0.006
0.006
-
-
-20
0.023
0.025
0.027
0.029
0.031
0.032
0.034
0.036
-
-
0
0.10
0.11
0.12
0.13
0.13
0.14
0.15
0.15
0.16
0.17
20
0.37
0.39
0.41
0.43
0.45
0.47
0.49
0.51
0.53
0.55
40
1.08
1.13
1.18
1.24
1.29
1.34
1.39
1.44
1.49
1.54
60
2.73
2.84
2.95
3.07
3.18
3.29
3.40
3.52
3.63
3.74
80
6.08
6.30
6.51
6.73
6.95
7.17
7.39
7.61
7.83
8.05
100
12.2
12.6
13.0
13.4
13.8
14.2
14.6
15.0
15.3
15.7
120
22.6
23.3
23.9
24.6
25.2
25.8
26.5
27.1
27.8
28.4
140
39.1
40.0
41.0
42.0
43.0
44.0
45.0
45.9
46.9
47.9
160
63.5
64.9
66.4
67.8
69.2
70.7
72.1
73.5
74.9
76.4