SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

SonTek/YSI
5.2. Argonaut Internal Electronics and Wiring Overview
This section provides information about the basic internal layout of the Argonaut. For more
information, refer to the following sections.
• Section 4.2 – Compass installation
• Section 5.3 – Argonaut processor and functional/connector descriptions
• Section 5.6 – Accessing electronics
5.2.1. Argonaut MD
Figure 7 shows the internal layout of an Argonaut MD. The system is shown with the transducers
pointing down (as if resting on a table), although the compass is shown installed for upward
looking operation. The system can be operated either looking up or down; it will be configured at
the factory based on user specifications. You must
modify the compass installation and system
orientation setting if switching between up and
down-looking operation; see §4.2.1 for details.
Starting at the transducer head and moving up, the
following important items are seen.
• The dual o-ring seals are exposed on the top of
the transducer head. Whenever opening the
system, take care to avoid damage to all o-rings
and o-ring surfaces. Clean and inspect o-rings
surfaces before closing the system; replace
o-rings when necessary.
• The receiver board is mounted on three 3/8”
standoffs directly from the transducer head. The
transducers are wired directly to the receiver
board.
• An internal mounting frame for the compass/
tilt sensor and Argonaut processor is mounted
on three 2.5” standoffs on the receiver board.
• The compass/tilt sensor is mounted from an
internal mounting plate above the receiver
board. The installation of the compass must
match the system orientation setting for proper
operation (§4.2.1).
• The Argonaut processor (consisting of the
analog and CPU electronics boards) is mounted
on two sets of four ½” standoffs from the
internal mounting hardware. The analog board
is on top (to the left in Figure 7) of the CPU
board. The two boards are connected using an
edge connector at one end of the board (the top
end as shown in Figure 7). See §5.3 for a
detailed description of the Argonaut processor.
48
2.5"
3/8"
Analog Board
3/8"
Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)
0.5"
0.5"
CPU Board
Compass/Tilt
Sensor
Receiver Board
Figure 7 – Argonaut MD
Internal System Layout
Bore Seal
O-ring
Boss Seal
O-ring