Accuracy of absolute humidity (g/m3), Accuracy of wet bulb temperature (°c) – Vaisala HMP240 User Manual
Page 66
HMP240
User's Guide
M210300en
64
8.3.2 Accuracy of other calculated variables
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
0.001
0.002
0.002
0.002
0.003
0.003
-
-
-
-20
0.007
0.010
0.012
0.014
0.017
0.019
0.021
0.024
0
0.033
0.043
0.053
0.063
0.074
0.084
0.094
0.104
0.115
0.125
20
0.12
0.15
0.19
0.23
0.26
0.30
0.33
0.37
0.41
0.45
40
0.37
0.49
0.61
0.74
0.87
1.00
1.14
1.28
1.42
1.57
60
1.03
1.41
1.82
2.26
2.73
3.25
3.82
4.43
5.10
5.84
80
2.60
3.79
5.23
6.99
9.16
11.85
15.25
19.57
25.17
32.54
100
6.24
10.49
17.10
27.98
47.20
84.96
172.5
446.0
-
-
120
15.45
36.25
100.4
464.4
-
-
-
-
-
-
140
44.97
326.3
-
-
-
-
-
-
-
-
160
228.7
-
-
-
-
-
-
-
-
-
Accuracy of absolute humidity (g/m3)
Relative humidity
Temp.
10
20
30
40
50
60
70
80
90
100
-40
0.002
0.003
0.003
0.004
0.005
0.005
-
-
-
-
-20
0.011
0.014
0.018
0.022
0.026
0.030
0.034
0.037
-
-
0
0.045
0.060
0.075
0.090
0.105
0.120
0.13
0.15
0.16
0.18
20
0.15
0.20
0.24
0.29
0.34
0.38
0.43
0.48
0.53
0.57
40
0.43
0.57
0.71
0.85
0.99
1.12
1.26
1.40
1.54
1.68
60
1.09
1.45
1.81
2.17
2.53
2.88
3.24
3.60
3.96
4.32
80
2.43
3.24
4.06
4.88
5.69
6.51
7.33
8.15
8.96
9.78
100
4.89
6.56
8.23
9.90
11.57
13.25
14.92
16.59
18.26
19.93
120
9.06
12.19
15.33
18.46
21.59
-
-
-
-
-
140
15.66
21.12
-
-
-
-
-
-
-
-
160
25.53
-
-
-
-
-
-
-
-
-
Accuracy of wet bulb temperature (°C)
Relative humidity
Temp.
10
20
30
40
50
60
70
80
90
100
-40
0.18
0.18
0.18
0.18
0.19
0.19
-
-
-
-
-20
0.15
0.16
0.17
0.18
0.19
0.19
0.2
0.21
-
-
0
0.15
0.17
0.2
0.22
0.24
0.26
0.28
0.3
0.31
0.33
20
0.21
0.25
0.29
0.32
0.35
0.38
0.4
0.43
0.45
0.47
40
0.37
0.43
0.48
0.52
0.55
0.57
0.6
0.61
0.63
0.64
60
0.63
0.68
0.71
0.74
0.76
0.77
0.79
0.8
0.81
0.82
80
0.96
0.94
0.94
0.94
0.94
0.95
0.95
0.96
0.97
0.98
100
1.3
1.18
1.13
1.12
1.11
1.11
1.11
1.12
1.12
1.13
120
1.62
1.39
1.31
1.28
1.27
-
-
-
-
-
140
1.9
1.58
-
-
-
-
-
-
-
-
160
2.17
-
-
-
-
-
-
-
-
-
The formulas used in calculation of dewpoint/frostpoint, mixing ratio and
absolute humidity are presented in Appendix 5.