3 general, 4 accuracy of the calculated quantities, 1 accuracies in metric units – Vaisala HMP46 User Manual
Page 48: Accuracy of the calculated quantities
HMI41 AND PROBES
Operating Manual
M210316EN-A
44
11.3.3
General
Operating temperature range
-20...+60
°
C
sensor head
-40...+100
°
C (temporarily + 180
°
C)
Storage temperature range
-40...+80
°
C
Material:
handle
ABS plastic
pipe
stainless steel
cable
PVC spiral cable
Housing classification (electronics)
IP65 (NEMA 4)
Weight
450 g (incl. package)
11.4
Accuracy of the calculated quantities
Dewpoint temperature, mixing ratio, absolute humidity and wet bulb tempera-
ture are calculated from the measured relative humidity and temperature
values. The accuracy of the calculated quantities depends on the calibration of
the probe and on performing the measurement correctly. In tables below the
accuracies of the measured values are
±
2 %RH and
±
0.2
°
C.
11.4.1
Accuracies in metric units
Accuracy of dewpoint temperature (°C)
RH/%
10
20
30
40
50
60
70
80
90
100
T/
°
C
-40
1.82
1.00
0.74
0.61
0.53
0.48
0.44
0.42
-
-
-20
2.09
1.14
0.83
0.68
0.59
0.53
0.49
0.45
-
-
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
1.27
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