Vaisala HUMICAP HMP155 Guia do Utilizador descarregar pdf (Página 76)

USER'S GUIDE____________________________________________________________________

74 _______________________________________________________________ M210912EN-C

Calculated Variables

Table 19 Calculated Variables

Quantity Abbreviation Metric Unit Non Metric

Unit

Dew point / Frost point

Temperature (T

d/f

)

TDF ºC ºF

Dew point Temperature (T

) TD ºC ºF

Mixing ratio (x) X g/kg gr/lbs.

Wetbulb temperature (T

) TW ºC ºF

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 Dew point 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

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

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 82 83 84

Sem comentários

Vaisala HUMICAP HMP155 Guia do Utilizador Página 76