Vemco HR2, User Manual

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7.2 O-Ring Care
O-rings
located in the end-cap of the HR2 case are crucial to the watertight seal of the receiver. Each
time an O-ring is disturbed, for any reason, it must be checked before the unit is sealed again. Something
as simple as a stray hair could be the difference between a successful study and a damaged receiver.
WARNING: Improper care of the O-rings and their mating surfaces can result in water leaking into the
receiver casing, destroying the electronics.
Just as the O-rings are vital to a good seal, so are the O-ring surfaces . These surfaces hold the O-ring
in position and must also be clean and damage free or the HR2 case could flood with water.
WARNING: Each time an O-ring is disturbed , for any reason, it must be checked before the unit is
sealed again.
7.2.1 Removing O-Rings
The O-rings must be removed from their grooves to allow the O-rings and the grooves to be inspected
and cleaned. Do not use a sharp object, which may damage the groove surface, when removing the O-
rings.
WARNING: Do not use a sharp object near O-ring surfaces . The surface could be damaged.
To remove O-ring
1. Use a lint-free cloth to grip two points on the O-ring with your thumb
and finger, approximately 5 cm apart . It’s best to start with the O-ring
farthest from the case threads.
2. Pull your thumb and finger towards each other while maintaining your
grip on the O-ring. This requires pressure against the O-ring and should
produce a loop of exposed O-ring.
3. Grab the exposed O-ring and pull it away from the end cap, so it moves
along the body of the receiver.
4. Repeat Steps 1 -3 for the other O-ring.
5. Clean any O-ring grease on the plastic casing.
7.2.2 Cleaning O-Ring Surfaces
An O-ring surface is any surface the O-ring touches .
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HR2 Receiver User Guide