Campbell Scientific CS106 Barometer - Manual (Page 26)

Appendix B. Example Programs
B.1.2 Example CR1000 Program Using Pipeline Mode
Although this example is for the CR1000, other CRBasic dataloggers, such as
the CR200(X), CR800, CR850, CR3000, and CR9000(X) are programmed
similarly. In the example, the CR1000 measures the CS106 once an hour in a
program that runs at 1 Hz. In order to keep the CR1000 running in a pipeline
mode, the measurement instruction is placed outside the “If” statement. The
measurement is made every scan, and the measured value is first written into a
temporary variable called "CS106_temp". Once the CS106 is turned on one
minute before the hour, the CS106 starts to make the correct pressure
measurements. At the top of the hour, the correct value is copied into the
current variable called “pressure”, and the sensor is turned off immediately.
The program’s integration parameter for the VoltSE() instruction is _60Hz.
However, for Eddy Covariance programs or other datalogger programs that are
executed at a higher frequency, the integration parameter should be 250 µs
instead of _60Hz or _50Hz. This prevents skipped scans.
'CR1000 Datalogger
Public CS106_temp, pressure
Units pressure = mbar
DataTable (met_data,True,-1)
DataInterval (0,60,min,10)
Sample (1,pressure,IEEE4)
EndTable
BeginProg
PipeLineMode
Scan (1,sec,3,0)
'Measurement is made every scan outside the "If" statement
VoltSE (CS106_temp,1,mV2500,1,False,0,_60Hz,0.240,500)
'Turn on CS106 one minute before the hour
If (TimeIntoInterval (59,60,min)) Then WriteIO (&b1000,&b1000)
'Copy the correct value to a current variable called "pressure" at the top of the hour
'Turn off CS106 after the measurement
If (TimeIntoInterval (0,60,min)) Then
pressure = CS106_temp
WriteIO (&b1000,&b0)
EndIf
CallTable met_data
NextScan
EndProg
B-2