Edgetech 2000-CSS, User Manual

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5-4 5.0: MAINTENANCE
2000-CSS COMBINED SONAR 0017423_REV_C
WARNING! With the towfish powered, high voltages that can cause injury
or death are present on the electronics chassis. Use caution when
working on the electronics chassis with the towfish powered.
5.3.2 Reassembling the Towfish
Before reassembling the towfish, clean the two O-rings on the end cap with a lint free paper towel and
inspect them for any scratches, nicks or dirt. If any of these conditions exist for an O-ring, discard the O-
ring and install a new one. When installing a new O-ring, first clean the O-ring surfaces on both the housing
and the end cap with the paper towel, and then apply a light coating of silicone lubricant to the new O-
ring around its entire surface and install it. If no scratches, nicks or dirt are found when cleaning the O-
rings, leave them installed and apply a light coat of silicone grease only.
To reassemble the towfish, reverse the disassembly procedure. However, when reassembling the end cap
to the housing, line it up as shown in
F
IGURE
5-2
with the arrow pointing up.
5.4 Calibrating the Compass
The compass is calibrated at the EdgeTech manufacturing facility. Should the compass in the towfish lose
its calibration for any reason in the field, it may be necessary to recalibrate it. This is accomplished by
accessing the embedded Windows installation in the towfish itself via a remote desktop application on
the Rack Mount Topside.
Furthermore, it is necessary to physically move the towfish around in different positions for the compass
within it to establish the necessary reference points. The support of at least two survey technicians, and
a rotating table (as shown in the procedure to follow) or winch for hoisting and rotating the towfish are
essential:
1. Power up the Rack Mount Topside with towfish connected.
2.
Click on the Remote Desktop icon (
F
IGURE
5-3
) and click Connect on the splash screen (
F
IGURE
5-4
).
Figure 5-3: Remote Desktop Icon