Instruction manual

Appendix D. SDI-12 Sensor Support
characters are typed within 60 seconds, then the mode is exited. In that
case, simply enter the command SDI12 again, press <enter>, and key in
the correct control port number when prompted.
6. To change the SDI-12 address, key in aAb! <enter>, where a is the current
address from the above step and b is the new address (see FIGURE D-2).
The CS451/CS456 will change its address and the datalogger will respond
with the new address. To exit SDI-12 transparent mode, select the Close
Terminal button.
FIGURE D-2. CR1000 example of using the SDI-12 transparent mode
to change the SDI-12 address from 3 to 1. Sensor is connected to
control port 1.
D.3 Advanced SDI-12 Commands
Extended SDI-12 commands can be used to configure the CS451/CS456 data
output and sample number. To query the sensor for the configuration, use the
aV! command followed by the aD! command.
The aV! returns four values:
1. Temperature configuration where 0 = degrees C and 1 = degrees F
2. Pressure Configuration where 0=PSIg, 1= kPa, 2=bar, 3=Feet,
4=meter, 5=Inch and 6=MilliMeter
3. Multiplier
4. Offset Need to correct Appendix D.1.3, Send Identification Command
(aI!)
(p. D-2), Returned string: 013CampbellCS45X 001SN=12345678
Where: SDI-12 version = 1.3 Manufacturer = Campbell Sensor model
= CS45X Operating System = 001 Sensor serial number = 12345678
The extended commands are used to select the temperature units (Celsius or
Fahrenheit), pressure/level units (psig, kPa, bar, feet, meter, inches, or
millimeter), and the integration time for each measurement. If level units are
D-5