VEMCO – VR4-UWM Manual
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To check for...
Then...
water leakage
dry the seam completely and watch for drops of water around the seam
air leakage
spread soapy water around the seam and watch for bubbles indicating air escaping
If air and/or water are found leaking from the receiver case, do not attempt to open it right away. Instead,
place the receiver in a safe place and cover it with a protective layer of towels, tarpaulins, etc. until the
leaking stops.
Do not attempt to re-use the VR4-UWM receiver after water has been inside the case. The internal housing
protecting the electronics is not waterproof and the electronics have been destroyed by contact with water.
8.2.2.1 Pressurized Main Housing
If you suspect pressurization of the main housing, open it slowly as follows:
1.
Place the VR4-UWM upright on the floor or flat stable ground. Do not let it tip over and strike the
ground. Do not place any part of your body directly over the VR4-UWM, in case the lid shoots off.
2.
Loosen all the lid bolts one turn (see section 5.1.1 for details).
3.
Check for leaking air or water around the seam between the lid and main housing. If you detect
leakage, let the pressure bleed off until it stops leaking.
4.
Go back to Step 2 and repeat until the bolts are all loose and move freely.
5.
Remove the bolts and the lid. Note any strong chemical odour, as this indicates the battery has
ruptured and leaked corrosive materials.
Do not breathe the fumes and do not let any of the liquid
get on your skin or clothing.
8.2.2.2 Pressurized Hydrophone Housing
If you suspect pressurization of one or both hydrophone housings, open the hydrophone(s) slowly as follows:
1.
Place the VR4-UWM upright on the floor or flat stable ground. Do not let it tip
over and strike the ground. Do not place any part of your body directly over the
VR4-UWM, in case the hydrophone housing shoots off.
2.
Loosen each of the three socket head screws in the hydrophone one turn.
3.
Check for air or water leaking out around the base of the hydrophone. If you
detect leakage, then let the pressure bleed off until it stops leaking.
4.
Go back to step 2 and repeat until the screws are all loose and move freely.
5.
Remove the screws and gently wiggle the hydrophone straight up off the lid. Do
not twist it off. Be careful not to strain the wires between the hydrophone and lid
– they are quite short. Empty out any water that may be in the hydrophone and replace it and the
screws.
Hydrophone screws
Caution:
Do not remove the wire feed-through
plug from the lid. Doing so might allow
water to drip down into the main
housing, causing further damage.