Kippzonen CNR 4 Net Radiometers Manual de usuario descargar pdf (Pagina 12)

11

Temperature

[EC]

Resistance

[Ω]

Temperature

[EC]

Resistance

[Ω]

Temperature

[EC]

Resistance

[Ω]

-30

-29

-28

-27

-26

-25

-24

-23

-22

-21

-20

-19

-18

-17

-16

-15

-14

-13

-12

-11

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

135200

127900

121100

114600

108600

102900

97490

92430

87660

83160

78910

74910

71130

67570

64200

61020

58010

55170

52480

49940

47540

45270

43110

41070

39140

37310

35570

33930

32370

30890

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

29490

28150

26890

25690

24550

23460

22430

21450

20520

19630

18790

17980

17220

16490

15790

15130

14500

13900

13330

12790

12260

11770

11290

10840

10410

10000

9605

9227

8867

8523

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

8194

7880

7579

7291

7016

6752

6500

6258

6026

5805

5592

5389

5193

5006

4827

4655

4489

4331

4179

4033

3893

3758

3629

3504

3385

3270

3160

3054

2952

2854

Table 1.2 Resistance values versus temperature in °C of the CNR 4's thermistor.

Relatively small errors occur when the CNR 4 is not in thermal equilibrium. This happens for example when the

heater is on, or when the sun is shining. When the heater and ventilator are on, the largest expected deviation

between real sensor temperature and Pt-100 or thermistor reading is less than 0.5 degree.

The internal temperature sensors will not give a good indication of ambient air temperature; at 1000 Watts per

square meter Solar Radiation, and no wind, the instrument temperature can rise a few degrees above ambient

temperature. This will not affect the readings of the CNR 4

The offsets of both pyranometers and pyrgeometers might be larger than 5 Watts per square meter if large

temperature gradients are forced on the instrument (larger than 5 K/hr). This happens for example when rain hits

the instrument. The occurrence of this can be detected using the temperature sensor readout. It can be used as a

tool for quality assurance of your data.

Kippzonen CNR 4 Net Radiometers Manual de usuario Pagina 12

Comentarios a estos manuales

Kippzonen CNR 4 Net Radiometers Manual de usuario Pagina 12

Comentarios a estos manuales

Relacionado con productos y manuales para Instrumentos de medición Kippzonen CNR 4 Net Radiometers