Campbell Scientific CS445 Liquid Level Sensor - Manual (Page 9)

CS445 Liquid Level Sensor
5
BeginProg
Scan(60,Sec)
' Code for SDI-12 measurements:
SDI12Recorder(Level,0M!,1,0)
‘ Call the data table:
CallTable(Hourly)
NextScan
EndProg
5.3 Using Edlog
The following is an example of the P105 SDI-12 Sensor instruction used by
array-based dataloggers to interrogate an SDI-12 sensor.
Use Instruction 105 to read the CS445. Your datalogger manual has a detailed
explanation of Instruction 105.
Wiring for example program
Red 12V
Black G
Brown C1
Clear G
;{CR10X}
;
*Table 1 Program
01: 60 Execution Interval (seconds)
1: SDI-12 Recorder (P105)
1: 0 SDI-12 Address
2: 0 Start Measurement (aM0!)
3: 1 Port ;this is where the brown wire is connected
4: 1 Loc [ Level ]
5: 1.0 Mult
6: 0.0 Offset
*Table 2 Program
02: 0.0000 Execution Interval (seconds)
*Table 3 Subroutines
End Program
After this command is executed, the input location within the logger called
“Pressure” holds the measured pressure, reported in PSI. This result may be
further processed within the logger or stored to final storage memory. Note
that Port 1 specifies that the SDI-12 data line is to be connected to Port C1.
Other ports may be selected. The Multiplier and Offset can be changed to
scale the result or perform unit conversions (e.g., Depth = 2.31 * Pressure).