Teledyne Everywhereyoulook WAYFINDER, Руководство пользователя

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Wayfinder DVL Guide P/N 95P-6001-00 (October 2020)
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 9
Routing the Cable
Use care when routing the Power/Comm cable through bulkheads, deck plates, cable runs, and watertight
spaces. Make allowances in cable length and engineering design plans for cable routing. When necessary,
use strain reliefs on the cables.
Route the cable so
:
•
Cable does not have kinks or sharp bends (see
Cable Wiring Diagram
for specifications). Tight
mounting requirements next to bulkheads may require rotating the Wayfinder to prevent sharp
bends in the cable.
•
The Wayfinder cable (or junction box, if one is used) must NOT be exposed or installed next to
high voltage lines or circuits, motors or engines. See
Identifying EMI
for more information.
•
If a junction box is used, make sure that all the cable conductors are connected properly and
avoid ground loop effects. Make sure that the conductors are electrically isolated from each
other.
Flow Noise/Cavitation
Water flowing over the Wayfinder face increases the acoustic noise level, which in turn decreases the op-
erational range of the Wayfinder. Flow noise can be reduced by mounting the Wayfinder behind a fairing.
Flow noise can also be reduced by optimizing the design to conform to the platform hull form being used.
Avoid mounting the Wayfinder DVL in the input or output area of a thruster as this will reduce the Way-
finder operating range AND thruster performance. Cavitation is the formation of air bubbles due to the
reduction of ambient pressure because of hydrodynamic flow conditions. Cavitation at the edges of the
Wayfinder or surrounding area near the Wayfinder often results in increased acoustic noise, and a corre-
sponding reduction in operating range. As with flow noise, cavitation can also be reduced by optimizing
the design to the platform hull form being used.
Isolation Hardware
Once you have chosen a mounting location, use the four M5 mounting holes on the housing. See Figure 5
and Figure 6 for dimensions and weights. The Wayfinder housing is made of aluminum that is protected
by a sacrificial anode and a hard anodize coat. Do not connect other metal to the Wayfinder as this may
cause corrosion damage. Isolation hardware is not required for use in freshwater environments; it is
strongly recommended to use M5 isolating bushings and washers for saltwater environments. Keep this in
mind when fabricating a fixture, which materials to use, or deciding how to place it on the vehicle.