Olympus PT-027 - Manual (Page 18)

E-17
2. Advance Check of the Case
Advance test before use
This Case has been the subject of thorough quality control for the parts
during the manufacturing process and thorough function inspections
during the assembly. In addition, a water pressure test is performed
with a water pressure tester for all products to confirm that the
performance conforms to the specifications. However, depending on
the carrying and storage conditions, the maintenance status, etc., the
waterproof function may be damaged.
Before diving, always perform the following advance test and the water
leakage test after installation of the camera.
Making sure the case is waterproof
Check the parts that ensure the case is waterproof.
1. Make sure that the O-ring between the front and rear lids of the
case is attached firmly and the buckle is tightly secured.
2. Make sure that the O-rings between the case and standard port are
attached firmly and that the buckles are tightly secured.
3. Make sure that the O-ring on the TTL cable connector cap is
attached firmly and that the cap is fitted tightly to the connector.