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The O-ring seal is the main barrier between the water outside and the air space within

the camera. It is an effective barrier only if the seal is properly maintained. The O-ring

seal should be inspected before every dive. The following information is provided for

guidance in using and maintaining the O-ring seal.

4.2 Maintaining the O-ring Seal

If the main body to lid O-rings are not installed, install the O-rings before diving. Their care and

maintenance are critical to the watertight integrity of the housing. If the O-rings are contaminated,

or not already installed; inspect, grease and install the O-rings according to the following

guidelines.

4.3 Inspection, cleaning and re-instillation of the O-rings

Tools

A soft cotton bud or sponge applicator - make sure these are free of all contamination such as

loose fibers, and the tube of silicone grease supplied with the housing. Note other types of silicone

grease specifically for use with underwater camera equipment can usually also be used. It is

advised to carry out the following procedure on a firm clean level surface, e.g. at a table, to

prevent skidding especially when diving from a boat.

When to maintain the O-ring seal

Remove the O-ring periodically for inspection. It is not necessary to remove, clean and re-install

the O-ring after every dive provided the O-rings are not become contaminated. As a rule of

thumbs set up the camera and housing before a day's diving. If the housing is required to be

opened between dives for changing memory card or re-charging batteries, make sure the outside

of the housing is thoroughly toweled dry before opening up. After removing the lid and servicing

the camera, replace the lid straight away, rather than leaving it lying around. Before replacing the

lid, check the o-rings and make sure that no contamination such as dust, hair, salt, sand etc. has

fallen onto the O-ring or O-ring recess, as a precaution we recommend to inspect the O-ring every

time the lid is opened and to carry out the maintenance only if necessary.

Procedure

l Place the lid on a firm non-slip level surface.

l The O-ring can be extracted using an O-ring extractor tool (make sure the tool has no sharp

edges). Alternatively use the flats of the thumbs to gently stretch the O-ring on two faces thus

making a small loop protruding a few mm. T he loop can then be grasped between finger and

thumb to pull the O-ring over the lip.

l Clean the O-ring recess (the square groove where the O-ring sits) with a cotton bud or sponge