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3 general, 4 accuracy of the calculated quantities, 1 accuracies in metric units – Vaisala HMP46 User Manual

Page 48: Accuracy of the calculated quantities

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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

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