Ikelite Underwater TTL Housing for Canon EOS 40D - Manual (Page 25)

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Housing Maintenance
Your Ikelite Housing should be given the same care and attention as
your other photographic equipment. In addition to normal maintenance,
we recommend your housing be returned to Ikelite (every 2-3 years or
50 dives), to be checked and pressure tested.
- Do Not leave the camera and housing in direct sunlight for prolonged
periods. Heat may damage the camera.
- Do Not ship the camera in the housing.
- Before using the housing, always check the tightness of the set screw
in each control knob.
Check each control gland penetrating the housing to make sure they
are tight. There is a slight chance that either could vibrate loose during
travel.
- Keep the back and port o-ring clean and lightly lubricated. To lubricate,
remove the o-ring from the back. Put a small amount of lkelite lubricant
on your fingers. Pull the o-ring through your fingers to apply a light
coating of lubricant. Only apply enough lubricant to make the o-ring feel
slick. Do Not stretch the o-ring. This light coating of lubricant will help
to keep the o-ring from drying out and will help to show a dark sealing
line when the housing back is properly sealed.
- Keep the area where the o-ring fits and the sealing surface clean.
- Rinse the housing exterior thoroughly in freshwater after each saltwater
use. Depress push buttons several times during rinse. Dry with a soft
cloth. Dry port to eliminate water spotting.
After several uses in saltwater, soak the housing in a mild soap solution,
rinse, and dry.
- Although not recommended, if it is necessary to remove a housing push
button, Do Not re-use the E-clip. Contact Ikelite for replacement E-clips
(part #0319.12).
CAUTION: Never use spray lubricants as the propellant ingredient can
cause the plastic housing to crack. Use only Ikelite lubricant .