SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

SonTek/YSI
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• If OutMode (output mode) = AUTO, the Argonaut immediately transmits the buffer contents
through the serial port. If OutMode = POLLED, the Argonaut continues data collection
without transmitting the buffer contents.
• In either output mode (AUTO or POLLED), the last sample remains in the output buffer until
the next sample is completed. At this time, the contents of the buffer are replaced with the
new sample.
• When using the POLLED output mode, it is your responsibility to request transmission of
the buffer after each sample is collected and before the averaging interval for the next
sample is completed.
• The data sample upload can be done as many times as desired without significantly
affecting data collection, since the Argonaut uses only a few milliseconds of processing
time to retransmit the entire data buffer.
T (output date/time)
• Sending a “T” during data collection tells the Argonaut to output the current date and time
from its internal clock. Note: This command is not available if OutFormat = SEABIRD.
• The clock is read immediately before the date/time data are output, which can be up to one
second after the T command is sent.
• The date/time output will be in ASCII or BINARY format depending on the current setting
of the OutFormat parameter. If OutFormat is set to ASCII, METRIC, or ENGLISH, time is
output in ASCII format.
• In ASCII format, the following line will be sent.
yyyy/mm/dd hh:mm:ss.hh
• In BINARY format, the following nine bytes will be sent.
Run Time Command “T” Binary Output Record
Field Offset Length Description
Year 0 2 Integer four digit calendar year (e.g., 1995)
Month 2 1 Unsigned character
Day 3 1 Unsigned character
Hour 4 1 Unsigned character
Minute 5 1 Unsigned character
Sec100 7 1 Unsigned character - hundredths of a second
Second 6 1 Unsigned character
CheckSum 8 1 1-byte checksum of preceding eight bytes
(Appendix 1 explains checksum calculation.)
C+ and C- (clock adjust)
• The C command is used to adjust the Argonaut’s internal clock.
• C+ advances the clock one second.
• C- sets the clock back one second.
• The Argonaut acknowledges successful completion of this command with:
OK .
Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)