Campbell-scientific NR-LITE2 Net Radiometer Manuel d'utilisateur télécharger pdf (Page 24)

NR-LITE2 Net Radiometer

7.2.3.4 CR10X Example Program with Wind Speed Correction

This example measures the NR-LITE2 using a single-ended input and

instruction Volt (SE) (P1). The program also measures wind speed and applies

the correction factor as described in Section 5.4, Sensitivity to Wind Speed.

Average net radiation and wind speed are output every hour. TABLE 7-6

provides the wiring for this example program.

TABLE 7-6. Wiring for CR10X Example

(with Wind Correction)

Color Function CR10X Channels

Red Radiation Signal S.E. Channel 1

Blue Signal Reference AG

Black Shield G

;{CR10X}

;

*Table 1 Program

01: 60 Execution Interval (seconds)

;measure 05103 wind speed

1: Pulse (P3)

1: 1 Reps

2: 1 Pulse Channel 1

3: 21 Low Level AC, Output Hz

4: 1 Loc [ Wspd_m_s ]

5: .0980 Mult

6: 0 Offset

;measure NR-LITE2 net radiation

2: Volt (SE) (P1)

1: 1 Reps

2: 3** 25 mV Slow Range

3: 1* SE Channel

4: 2* Loc [ Rn_obs ]

5: 63.29 Mult ;Multiplier for specific sensor

6: 0 Offset ;in units of (W m

-2

)/mV (see above)

;apply wind speed correction factor

;Rn,cor = Rn,obs*(1.0+0.021286*(U-5.0)) when U > 5 m/s

3: If (X<=>F) (P89)

1: 1 X Loc [ Wspd_m_s ]

2: 3 >=

3: 5 F

4: 30 Then Do

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 30

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Campbell-scientific NR-LITE2 Net Radiometer Manuel d'utilisateur Page 24