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Ｑ８ ：What are the causes for entry of water?
Ａ８ ：The main causes for the entry of water are shown below. Please check them most carefully.
(1) Forgetting to install the O-ring
(2) The O-ring is partly or completely outside the groove.
(3) Damage, deterioration, or deformation of the O-ring
(4) Sand, fibers, hair or other foreign matter on the O-ring
(5) Sand, fibers, hair or other foreign matter on the O-ring groove or the O-ring contact surface
(6) When the bag of silica gel is caught between the front and rear lids when closing the case.
(7) Throwing the Case from a boat into the water, jumping with the Case into the water, or
other sudden application of strong forces onto the Case. When entering the water,
hand the Case over quietly or avoid impacts in other ways.
Ｑ９ ： What are the important points for O-ring maintenance?
Ａ９ ：Please observe the following items.
(1) Never use alcohol, thinner, benzene or similar organic solvents or chemical
detergents to clean the O-ring. When such chemicals are used, it is to be feared that
the O-ring will be damaged or that its deterioration will be accelerated.
(2) Use the original Olympus silicone O-ring grease (white cap). The grease attached to
Cases up to PT-008 (red cap) and the grease of other companies are not suitable for
this silicone O-ring, and use of such grease may cause deterioration of the surface
and impairment of the waterproof function.
(3) In order to avoid deformation of the O-ring when the Case is not used for a long time,
remove the O-ring from the Case, apply a thin coat of the special grease, and store the
O-ring in a clean plastic bag. For reuse, confirm that the O-ring is free of damage and
cracks, that it has sufficient elasticity, that the surface is free of stickiness and other
abnormalities, and use it after applying a thin coat of the special grease. Excessive
application of grease does not improve the waterproof function or the permissible
En
withstand pressure. However, it may facilitate attachment of sand, dirt, etc.
A thin, uniform coat produces the best result.
(4) The O-ring is a consumable product. Replace it at least once a year.
(5) Deterioration of the O-ring is accelerated by the use conditions and the storage
conditions. Replace the O-ring immediately by a new one if it shows signs of damage,
cracking or loss of elasticity.
Ｑ １ ０ ：What are the important points for Case maintenance?
Ａ １ ０ ： Please observe the following items.
(1) Never use the following chemicals for cleaning, corrosion protection, defogging, repair
or other purposes.
・Never use alcohol, thinner, benzene or similar volatile organic solvents or chemical
detergents to clean the Case. Pure water or lukewarm water is sufficient for cleaning.
・Do not use anticorrosion agents on the metal parts. The metal parts are made of
aluminum, brass or stainless steel. Cleaning with pure water is sufficient.
E-25
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