Campbell Scientific CS106 Barometer - Manual (Page 18)

CS106 Barometric Pressure Sensor
7.4 Programming
Short Cut is the best source for up-to-date datalogger programming code.
Programming code is needed,
• when creating a program for a new datalogger installation
• when adding sensors to an existing datalogger program
If your data acquisition requirements are simple, you can probably create and
maintain a datalogger program exclusively with Short Cut. If your data
acquisition needs are more complex, the files that Short Cut creates are a great
source for programming code to start a new program or add to an existing
custom program.
Short Cut cannot edit programs after they are imported and edited
in CRBasic Editor.
A Short Cut tutorial is available in Section 4, Quickstart. If you wish to import
Short Cut code into either Edlog or CRBasic Editor to create or add to a
customized program, follow the procedure in Appendix A, Importing Short Cut
Code into CRBasic Editor. Programming basics for CRBasic and Edlog
dataloggers are provided in the following sections; more detailed information
about multiplier and offset calculations, conversion factors, long cable lengths,
resolution, and correcting pressure to sea level is provided in Section 8,
Operation. Complete program examples for select dataloggers can be found in
Appendix B, Example Programs.
7.4.1 CRBasic Instructions
The VoltSE() measurement instruction programs CRBasic dataloggers
(CR200(X), CR800-series, CR1000, CR3000, CR5000, CR9000(X)) to
measure the CS106.
VoltSE( Dest , Reps , Range , SEChan , MeasOff , SettlingTime , Integration ,
Multiplier , Offset )
At sea level, a multiplier of 0.24 and an offset of 500 will report the barometric
pressure in mbar or hPa. The offset will need to be adjusted if the barometer is
not at sea level (see Section 8.5, Correcting Pressure to Sea Level). If different
barometric pressure units are desired, see Section 8.2, Conversion Factors.
Often, the TimeIntoInterval() CRBasic instruction is used to only power the
barometer while making the measurements. Atmospheric pressure changes
little with time. In most weather station applications, measuring the barometer
pressure once an hour is adequate. See Appendix B, Example Programs, for
more information.
7.4.2 Edlog Instructions
The Volt (SE) (P1) measurement instruction programs Edlog dataloggers
(CR500, CR510, CR10(X), CR23X, CR7, and 21X) to measure the CS106.
NOTE
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