Vaisala HMP243 User's Guide download pdf (Page 66)

HMP240

User's Guide M210300en

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

0.033 0.043 0.053 0.063 0.074 0.084 0.094 0.104 0.115 0.125

0.12 0.15 0.19 0.23 0.26 0.30 0.33 0.37 0.41 0.45

0.37 0.49 0.61 0.74 0.87 1.00 1.14 1.28 1.42 1.57

1.03 1.41 1.82 2.26 2.73 3.25 3.82 4.43 5.10 5.84

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/m

)

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 - -

0.045 0.060 0.075 0.090 0.105 0.120 0.13 0.15 0.16 0.18

0.15 0.20 0.24 0.29 0.34 0.38 0.43 0.48 0.53 0.57

0.43 0.57 0.71 0.85 0.99 1.12 1.26 1.40 1.54 1.68

1.09 1.45 1.81 2.17 2.53 2.88 3.24 3.60 3.96 4.32

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 - -

0.15 0.17 0.2 0.22 0.24 0.26 0.28 0.3 0.31 0.33

0.21 0.25 0.29 0.32 0.35 0.38 0.4 0.43 0.45 0.47

0.37 0.43 0.48 0.52 0.55 0.57 0.6 0.61 0.63 0.64

0.63 0.68 0.71 0.74 0.76 0.77 0.79 0.8 0.81 0.82

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.

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 129 130

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Vaisala HMP243 User's Guide Page 66

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