SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

A4.3. Configuring the Serial-to-AO Converter
Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)
SonTek/YSI
To output data in an analog-current format, the Argonaut-SL/XR uses an RS232 to 4-20 mA
converter (mfg P/N D3261). To output data in an analog-voltage format, the Argonaut-SL/XR
uses an RS232-to-Voltage converter (mfg P/N D3262). Both these converters are manufactured
by DGH. For details about these converters, see the DGH D3000/D4000 Series Users Manual.
Before use, the Converter must be configured to communicate with the Argonaut. The following
steps present the basic procedure.
1. Connect the Converter to a serial port on your computer using the male, 9-pin, serial
connector (DB9-M) on the analog output cable provided by SonTek (Figure A4.1).
2. Connect the pigtail (exposed wires) on the other end of the cable to the Converter (example
shown in Figure A4.2) as follows:
• Black wire to GND (ground)
• Orange wire to RECEIVE
• Green wire to TRANSMIT
3. Connect a power source (10 to 30 VDC) to the Converter as follows (Figure A4.1):
• Negative wire to GND (ground)
• Positive wire to +VS
4. Connect terminals of the analog sensing/control unit to +OUT and –OUT (Figure A4.1).
Figure A4.1. Connections to Converter
Figure A4.2. Pigtail Wiring Diagram
5. Connect a power source (10 to 30 VDC) to the Converter as follows (Figure A4.1):
6. After connecting the serial cable, power source, and pigtail, apply power to the system. On
your PC, run a terminal emulator program such as SonTek’s SonTerm.
7. In SonTerm, select the appropriate COM port and set the baud rate to 9600 (if the Converter
was previously configured by SonTek or the user) or 300 (if the Converter is a new unit
purchased directly from the manufacturer, DGH).
8. In SonTerm, enter the command $1RD. If the Converter is properly configured, you will
receive a response of *+00004.00. If no response is received, try an alternative baud rate or
address (see Step 7). Note: All commands to the Converter must begin with a dollar sign ($);
all responses from the Converter will begin with an asterisk (*).
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