Increasing Thruster Power; Loss Of Thruster Power; Fogged View Port And/ Or Light Lenses - VideoRay PRO 3 User Manual

VideoRay Pro 3 User's Manual
7.6

INCREASING THRUSTER POWER

In some situations it may be advantageous to have more thruster power available, particularly when
working in currents. There are several steps that can be performed to increase thruster power.
1) To gain more thrust, first remove the grills from the rear of the thruster guards.
2) Second, to gain even additional thrust, remove the thruster guards themselves.
Note: Removing the thruster guards may increase chances of fouling the propellers and should not be
attempted in conditions of heavy debris or seaweed.
Additional thruster power can be achieved by minimizing the power consumption of the lights. To
maximize the power available to the thrusters, operate the lights at the lowest possible setting that still
allows adequate visibility.
7.7

LOSS OF THRUSTER POWER

1) Should VideoRay suddenly become unresponsive in a particular direction, it is possible that one of the
thrusters may have lost power. The most common cause of thruster power loss is a fouled propeller.
This often is the result of organic or synthetic material becoming tangled in a propeller and
subsequently wrapped tightly around the propeller shaft.
2) VideoRay's thrusters are designed to operate at their rated speed for extended periods of time.
However, should a propeller become jammed, the motor may burn out if power is continually applied.
Power should be turned off, and the vehicle retrieved and inspected. Remove any debris and test the
thruster for proper operation. Note that the guards on the VideoRay are specifically designed for rapid
and easy removal.
3) If VideoRay's thrusters are not fouled and still do not run, try resetting the VideoRay computer by
switching the power supply off, waiting ten seconds, and switching it back on again.
4) Servicing may be necessary if the propeller and shaft are clear and rotate freely, yet the thruster does
not respond to its controls.
7.8

FOGGED VIEW PORT AND/ OR LIGHT LENSES

Atmospheric conditions may result in some humidity being present inside VideoRay's pressure housings.
This may cause condensation to form on the camera view port and/or light lenses. VideoRay includes a silica
gel desiccant package with color-coding. Normally blue, when the stripe on the package is pink, it should be
replaced. When performing any maintenance that requires the housing to be open, it should be done in the
driest atmospheric conditions possible.
November, 2007
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