Campbell-scientific 014A Met One Wind Speed Sensor Manuel d'utilisateur télécharger pdf (Page 27)

Appendix B. Example Programs

B.2 Control Port Example Program

The following CR5000 program uses control ports to measure three 014A wind

speed sensor. The program measures them every second and stores the mean

wind speed (in m s

–1

) every 15 seconds.

'CR5000 Series Datalogger

'Wind Speed using TimerIO Instruction

'Declare Variables and Units

Public J, WindSpeed(3)

'Define Data Tables

DataTable(Test,1,-1)

DataInterval(0,15,Sec,10)

Average(3,WindSpeed(),IEEE4,False)

EndTable

'Define Subroutines

'Sub

'Enter Sub instructions here

'EndSub

'Main Program

BeginProg

Scan (1,Sec,0,0)

'Measure the WindSpeed Profile 014A, 3 anemometers connected to C4, C5, C6 ports

TimerIO (WindSpeed(1),11000111,00222000,100,0) 'Frequency on falling edge

'Convert measurement to m/s

For j = 1 to 3

WindSpeed(j) = 0.447 + WindSpeed(j)/1.25

Next j

CallTable Test

Next Scan

End Prog

B-3

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Campbell-scientific 014A Met One Wind Speed Sensor Manuel d'utilisateur Page 27