Campbell CVF4 Specifiche Scaricare il pdf (Pagina 17)

CNR4 Net Radiometer

The thermistor measurement can be done by the datalogger, using the half

bridge measurement method which requires one voltage excitation and one

single-ended analog channel.

Alternatively, you can use the Pt-100 to make the temperature measurement.

In order to make the temperature measurement, using the Pt-100 sensor, you

will need one current excitation channel, and one differential analog channel.

Please refer to Appendix C for a sample program to measure Pt-100.

TABLE 5-1. Resistance values versus CNR4's thermistor temperature in °C.

Temperature

[°C]

Resistance

[Ω]

Temperature

[°C]

Resistance

[Ω]

Temperature

[°C]

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

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

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

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 59 60

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