Vaisala PTU300 - Calculated Variables; Accuracies of Calculated Variables; Accuracy of Dewpoint Temperature °C; Table 38 Calculated Variables (Typical Ranges)

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Calculated Variables
Table 38 Calculated Variables (Typical Ranges)
Variable PTU 301 PTU303 PTU 307
Dewpoint
temperature
-20...+60 ºC -20...+80 ºC -20...+100 ºC
Mixing ratio 0...160 g/kg dry air 0...500 g/kg dry air 0...500 g/kg dry air
Absolute
humidity
0...160 g/m
3
0...500 g/m
3
0...500 g/m
3
Wet bulb
temperature
0...60 ºC 0...+100 ºC 0...+100 ºC
Enthalpy -40...+1500 kJ/kg -40...+1500 kJ/kg -40...+1500 kJ/kg
Water vapor
pressure
0... 1000 hPa 0... 1000 hPa 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