Accuracy of wet bulb temperature (°c) – Vaisala HMP230 User Manual
Page 79
HMP230 SERIES
M210225en-B
User's Guide
73
Accuracy of wet bulb temperature (°C)
Relative humidity
Temp.
10
20
30
40
50
60
70
80
90
100
-40
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
-
-
-20
0.21
0.21
0.22
0.22
0.22
0.22
0.23
0.23
-
-
0
0.27
0.28
0.28
0.29
0.29
0.29
0.30
0.30
0.31
0.31
20
0.45
0.45
0.45
0.44
0.44
0.44
0.43
0.43
0.42
0.42
40
0.84
0.77
0.72
0.67
0.64
0.61
0.58
0.56
0.54
0.52
60
1.45
1.20
1.03
0.91
0.83
0.76
0.71
0.67
0.63
0.60
80
2.23
1.64
1.32
1.13
0.99
0.89
0.82
0.76
0.72
0.68
100
3.06
2.04
1.58
1.31
1.14
1.01
0.92
0.85
0.80
0.75
120
3.85
2.40
1.81
1.48
1.28
1.13
1.03
0.95
0.88
0.83
140
4.57
2.73
2.03
1.65
1.41
1.25
1.13
1.04
0.97
0.91
160
5.25
3.06
2.25
1.82
1.55
1.37
1.24
1.13
1.05
0.99
Accuracy of enthalpy (kJ/kg) at ambient pressure 1013 mbar
Relative humidity
Temp.
10
20
30
40
50
60
70
80
90
100
-40
0.21
0.21
0.21
0.21
0.21
0.21
0.21
0.21
-
-
-20
0.24
0.25
0.25
0.25
0.26
0.26
0.26
0.27
-
-
0
0.4
0.42
0.43
0.45
0.46
0.47
0.49
0.5
0.52
0.53
20
0.98
1.03
1.08
1.13
1.18
1.23
1.29
1.34
1.39
1.45
40
2.7
2.87
3.04
3.22
3.4
3.59
3.78
3.98
4.18
4.39
60
7.2
7.82
8.48
9.19
9.96
10.79
11.69
12.65
13.7
14.84
80
18.04
20.72
23.88
27.66
32.22
37.77
44.61
53.17
64.02
78.06
100
43.96
57.64
77.98
109.93
164.1
266.37
494.62
1180.46
-
-
120
111.6
203.93
470.52
-
-
-
-
-
-
-
The formulas used in calculation of dewpoint, mixing ratio, absolute humidity
and enthalpy are presented in Appendix 6.
9.4.
Pressure
Pressure range:
HMP234
0...10 MPa (0...100 bar)
HMP237
0...1MPa (0...10 bar)
HMP238
0…4 MPa (0…40 bar)
9.5.
Analogue outputs
Two analogue outputs selectable
0...20 mA
4...20 mA
0...1 V
0...5 V
0...10 V
Typical accuracy of analogue output
at +20 °C
±0.05 % full scale
Typical temperature dependence of
analogue output
0.005 %/°C full scale