RBR#0008819revB
13
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4.2 Replacing the O-rings
Care for the O-rings is the single most important item of maintenance on any submersible RBR instrument. A water leak
can damage the circuit board beyond repair and cause complete data loss. Every instrument's seal depends upon its O-
rings, not the end-cap tightness. Therefore, proper O-ring maintenance is crucial.
.
.
The RBR
quartz
3
BPR
|
zero uses two O-rings. One is the main O-ring, and the other is the backup. Both are required to
protect the instrument from flooding. To access the O-rings,
Location of the O-rings (main O-ring, backup O-ring)
.
Inspecting the O-rings and mating surfaces
Visually inspect the new O-ring for nicks and scratches before installing it. Pay attention to the following areas:
The surface of the O-ring itself
The mating surface on the inside of the case between the threads and the open end
The groove in the end-cap where the O-ring sits
The O-rings may lose elasticity over time, even when the instrument is not deployed. RBR strongly
recommends replacing the O-rings regularly.
main O-ring
backup O-ring
.
