Campbell Scientific CS450/CS455 Pressure Transducer - Manual (Page 23)

CS450/CS455 Pressure Transducer
Keyboard/Display users and SCWIN users can jump ahead to the Maintenance
section.
6.2 Using CRBasic or Edlog
6.2.1 CRBasic Programming
Dataloggers that use CRBasic include our CR200-series, CR800, CR850,
CR1000, CR3000, and CR5000. These dataloggers use the SDI12Recorder()
to read the CS450/CS455. A multiplier of 1.0 and an offset of 0.0 yield water
level in psig and temperature in degrees C.
The SDI12Recorder() instruction has the following form:
SDI12Recorder(Destination, Output String, Multiplier, Offset)
Sample Program for CR200-Series Datalogger
‘CR200 Series
‘Declare the variable for the water level measurement
Public CS450(2)
‘Rename the variable names
Alias CS450(1)=Level
Alias CS450(2)=Temp_C
‘Define a data table for 60 minute maximum and minimums
DataTable(Hourly,True,-1)
DataInterval(0,60,Min)
Maximum(1,Level,0,0)
Minimum(1,Level,0,0)
Maximum(1,Temp_C,0,0)
Minimum(1,Temp_C,0,0)
EndTable
‘Read sensor every 60 seconds
BeginProg
Scan(60,sec)
‘Code
for SDI-12 measurements:
SDI12Recorder(CS450,0M!,1,0)
‘Call
the data table:
CallTable(Hourly)
NextScan
EndProg
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