Campbell CS450, Instruction Manual

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CS450/CS455 Pressure Transducer
CR10X-PB and CR510-PB dataloggers require “*#n” being entered at the
prompt, where n is the control port being used.
Now check for response from the sensor with address zero by typing the SDI-
12 Identify command “0I!<Enter>” (that’s a zero, not the letter O). The sensor
should respond with an identification string similar to
“013CSI450.Std.01_xxxxxxxx”, where xxxxxxxx represents the eight-digit
serial number. Note that the SDI-12 standard allows for multiple probes to be
connected to one datalogger control port. For example, if you have another
SDI-12 probe on the C1 that has address 7, you could issue the identify
command “7I!<Enter>”.
Only one sensor of the same address can be connected when using the change-
address command.
3.1.4 RS-232 Connection via PC Terminal Software
PC terminal software can be used to communicate with the CS450/CS455 via
the RS-232 communication mode. For this example, HyperTerminal will be
used (see FIGURE 3-6).
The CS450/CS455 is connected to the PC via the A200 (see Section 3.1.1,
Using the A200 ).
Upon setup, HyperTerminal will request you enter the Communication
connection; it defaults to a phone connection. Change the communication to
the appropriate “Com” in the “Connect Using” box (see Section 3.1.1.4,
Determining which COM Port the A200 has been Assigned , to determine the
COM port that was assigned to the A200). HyperTerminal will then prompt
for the proper “Port Settings”. These should be:
TABLE 3-3. RS-232 Settings
Bits per second 9600
Data bits 8
Parity None
Stop bits 1
Flow control None
From the HyperTerminal screen, you will now be able to communicate with
the CS450/CS455. At the prompt, push the Enter key several times. This will
wake-up the RS-232 mode of the sensor. By default, the CS450/CS455 is in
the SDI-12 mode for communication. Once in the RS-232 mode, if there is no
communication for 20 seconds, the sensor will return to the SDI-12 mode.
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