Hach-Lange ORBISPHERE 31xxx Installation and Maintenance - Manual (Page 27)

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Section 5 Maintenance
5.1 Disassembly and assembly
5.1.1 Taking the sensor apart (membrane removal)
It is important to install the electrochemical sensor standing
on its base. This base offers good protection for the delicate
connector socket, at the same time providing a suitable work
stand.
Remove the plastic storage cap.
Unscrew the protection cap, using the tool provided in the
maintenance kit.
Pay attention to the components inside the protection cap.
Note the assembly order of each item (see protection cap
application tables in
Protection caps and related part kits on
page 39 ).
Note: The illustration on the right is an example only. Your
configuration may differ.
Pull up the attaching ring with the tool provided in the
maintenance kit.
Remove the membrane and mask (if applicable).
Drain the electrolyte into a sink and rinse the sensor cavity
with tap water.
CAUTION
Avoid eye or skin contact with electrolyte which can be
slightly corrosive.
Insert the prongs of the
membrane support removal
tool into the membrane
support holes, and unscrew
the membrane support.