Edgetech 2000-TVD, User Hardware Manual

Page: 83 / 111

5-5
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 tow vehicle, reverse the disassembly procedure. However, when reassembling the end
cap to the housing, line it up 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.
NOTE 1: Compass calibration for the 2000-TVD should only be done
under the advisement of E
DGE
T
ECH
C
USTOMER
S
ERVICE
.
NOTE 2: The following procedure is accomplished with the towfish's
electronics bottle (which contains the compass). This requires the towfish
to be disassembled and the bottle removed and then connected to the
topside.
1. Power up the topside with towfish's electronics bottle connected.
2. Click on the Remote Desktop icon ( F
IGURE
5-4 ) and click Connect on the splash screen ( F
IGURE
5-5 ).
Figure 5-4: Remote Desktop Icon