SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

3.2.4. Sleep Mode
Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)
SonTek/YSI
• Sleep mode is used to conserve power when the Argonaut is not in use. In the sleep mode,
the Argonaut consumes less than 1 mW of power.
• The sleep mode is entered from the command mode using the command PowerOff.
• You can exit the sleep mode and enter command mode by sending a BREAK or by sending
the command “+++” (§3.15).
• When in sleep mode, the Argonaut will not respond to any other external commands. The
exception is if system power is switched off and on (§3.3).
• If the Argonaut is left idle in command mode for more than five minutes, it will
automatically enter the sleep mode to conserve power.
3.2.5. SDI-12 Mode
• SDI-12 mode is used with SDI-12 communication protocol to match data-logger
requirements. For more information, see Appendix 2.
• SDI-12 mode is entered from command mode using the command sdi12 ON.
• In SDI-12 mode, the Argonaut first performs all setup requirements for data collection. It
then enters a low-power mode, awaiting commands from an external data logger.
• In SDI-12 mode, the Argonaut collects one sample at a time on command from an external
data-logger.
3.3. Special Notice when Changing Power Sources
When power to the Argonaut is turned off and on (e.g., when changing batteries or switching
power supplies), the Argonaut enters the mode it was in before power was lost.
• If previously in command or sleep mode, the system enters command mode.
• If previously in data acquisition mode, the system immediately starts real-time data
collection.
• If previously in deployment mode, the system starts a new deployment. StartDate and
StartTime are ignored and the new deployment begins immediately. This is a safety
feature to avoid data loss in the unlikely event of a problem with the system clock.
• If previously in SDI-12 mode, the system will again enter SDI-12 mode and wait for a
command to begin a new sample.
To Avoid Draining the Batteries When the System is Not in Use
• Always power the system off before storing the system to prevent draining the batteries.
• The splash-proof configuration can be powered off using the switch on the front panel.
• All Argonaut configurations can be powered off by establishing direct communications
using SonTerm and sending the command PowerOff (§3.7).
IMPORTANT:
• When some computers and data loggers are turned on or off, they send a signal out the
serial port that can be interpreted by the Argonaut as a BREAK (§3.4).
• If the Argonaut is connected to the serial port, this can interrupt data collection or bring the
Argonaut out of sleep mode and cause the loss of data or the draining of the batteries.
• Always disconnect the Argonaut from the computer or data logger before turning the
computer on or off.
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