15
SPECIAL NOTE – Enclosure Leak Check
While each housing has been water tested for leaks prior to shipment, it is strongly
recommended (owing to the cost of the Spectroradiometer) that the empty housing be “bounce
dived” to the maximum expected working depth prior to the unit’s first use after shipping or
after storage for any extended period. Simply roll up some loose paper towels, place them in
the housing, add weight to compensate for the absent unit’s weight and take it down. Thin,
absorbent paper is a great indicator, as water leaks can be quickly identified. Always be sure
to rinse with clear water and remove any excess water from the exterior, prior to opening the
housing.
Note: If any leak is found, the cause must be identified and corrected prior to using the
housing with the instrument.
In the very unlikely event that a rear panel “O” Ring seal leak is noticed during use (by
observing water droplets on the inside portion of the panel), immediately rotate the housing
unit to a horizontal position and take it to the surface. Maintain this horizontal position even
when lifting it from the water.
Note: Always remove excess water from the housing prior to removing the rear
endplate.
Removal of the Instrument from the Housing
This operation is basically the reverse of the installation sequence described previously. It is
best performed on a clean, padded surface, to avoid accidental damage to any components.
After ensuring that excess moisture has been removed from the external surfaces of the
underwater housing, release the four draw latches. Please note that there are small, raised latch
release tabs which must be depressed prior to opening the draw latches. These tabs are a
precaution against accidental release. (See Figure 18).
After releasing the latches, withdraw the rear panel/tray assembly. There will be some friction
from the sealing O-rings. Try to withdraw the assembly evenly. If there is too much resistance
to removal, the latches may be used to assist in extracting the rear panel/instrument assembly
from the housing. After the rear panel has been withdrawn sufficiently, the cylindrical
crossbars of the latches can be moved to a position on the back side of the corresponding latch
hooks. Depressing the draw latch levers will then push the cross bar against the back of the
latch hook, safely easing the rear panel from the housing. (See Figure 18).
Note: DO NOT ATTEMPT TO PRY THE REAR PANEL FROM THE MAIN
HOUSING by using a screwdriver or similar metal tool. Damage may result.
