Campbell CR10 PROM Instruction Manual download pdf (Page 20)

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APPENDIX A. EXAMPLE FLUX PROGRAM

A copy of the example CR23X program is available on the Campbell Scientific ftp site at

ftp://ftp.campbellsci.com/pub/outgoing/files/ec_csat3.exe. The file ec_csat3.exe is a self extracting DOS

file. At a DOS prompt type in ec_csat3.exe and press the <Enter> key.

The example flux program measures the CSAT3, a FW05 fine wire thermocouple, and a KH20 as well

as a net radiation soil heat flux and soil moisture. Connect the KH20 to differential channel 3 and the

FW05 to differential channel 4. The CR23X calculates the virtual sensible heat flux, sensible heat flux,

latent heat flux, the momentum flux, and friction velocity, all other cross products required to apply a post

processing coordinate rotation on the turbulent fluxes, and the average and variance of u

, u

, T

, FW,

and the average and standard deviation of V

(krypton hygrometer). The fine wire thermocouple data

(FW) and the krypton hygrometer data are shifted to match the CSAT3 pipeline delay.

The CR23X will miss one sample every 30 minutes, because of the additional overhead of computing the

30 minute statistics and fluxes. Background meteorological measurements of temperature and humidity

are required to apply the oxygen correction to the latent heat flux measured by the KH20. The energy

balance measurements are made in Table 2 to examine energy balance closure.

Connect all the sensors to the CR23X and power to the CSAT3 and the KH20. Download the program to

the CR23X. Verify that all the sensors are reading correctly by checking the data in Input Locations 1

through 20. After the system is up and running, reenter the execution interval in Table 1 and compile the

program (

0). This clears all the Intermediate and Input locations and starts the program from scratch.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 29 30

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Campbell CR10 PROM Instruction Manual Page 20