SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

SonTek/YSI
Assembling the processor
1. Install the CPU board on the internal hardware and secure with the four hex standoffs. Make
sure to install the board with the same alignment used before removing the boards.
2. Connect all appropriate internal wiring to the CPU board. See §5.3 for details on internal
connectors.
3. Install the analog board on top of the CPU board. Carefully align all pins on the edge
connector, seat the connector securely, and secure the analog board with four #4-40 screws.
4. Connect all appropriate internal wiring to the analog board. See §5.3 for details on internal
connectors.
5. Close the system following instructions in §5.6.1 and §5.6.2.
Verifying system operation after a change
Following any EPROM or timing controller change, you should immediately verify basic system
operation before discarding the old chips. After closing the system, connect the power and
communication cable and apply power to the system. Establish direct communication through a
terminal emulator by sending a BREAK. Set the instrument for a short averaging time (averaging
and sample internal to 15 seconds), set the output format to ASCII, and begin data collection
with the Start command. If data collection proceeds normally for a few samples, you can safely
discard the old chips.
Note that it is possible to incorrectly connect (or not connect) cables within the housing, and this
can potentially affect system operation. As soon as possible following any upgrade, perform a
basic test of all system components. This includes the temperature and pressure sensors (use the
Sensor CONT command; §3.12) and the compass/tilt sensor (§4.1). Most importantly, test
operation of the transducers in water using the system diagnostic software (ArgCheck – see
Argonaut Software Manual).
5.7. Replacing Battery Packs
5.7.1. Argonaut MD
The Argonaut MD pressure housing is divided in the middle; the processing electronics are
mounted to the transducer head and are contained within the upper half of the instrument. A
single battery pack consisting of 35 C-cell batteries is mounted in the lower half. The battery
portion is larger than the electronics area. A dividing wall, with a central hole to allow the cables
to pass, separates the two halves.
To access the battery pack, use the following steps.
1. Perform all maintenance in a static safe environment.
2. Remove the three screws holding the bottom end cap to the pressure housing.
3. Remove the bottom end cap. Because of the bore seal o-ring, the end cap may be difficult to
lift off the pressure housing. If necessary, have one person hold the housing while another
rocks the end cap back and forth.
4. The batteries are secured within the housing using several foam pads. After removing the end
cap, remove the first pad from the housing.
5. There are two connectors from the end cap to the internal wiring - one for external power and
one for serial communication. Each uses a unique, keyed connector that can only be
connected one way. The connectors should be below the first pad; disconnect these.
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Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)