Hach-Lange ORBISPHERE 31xxx Installation and Maintenance - Manual (Page 30)

28
Maintenance
Place the membrane holding ring on the installation tool tip.
CAUTION
To avoid damaging the membrane, make sure that the
tool tip is totally clean and its surface is even.
Insert the installation tool inside the guiding sleeve.
Push the installation tool firmly downwards. This clasps the
mounting ring onto the sensor head, folding the membrane
over the sensor tip.
Remove the installation tool and guiding sleeve.
Visually check for correct ring placement, try to push it down
with your fingers.
Check that the membrane is tight, with no wrinkles, and no
bubbles are present.
Rinse the sensor with tap water and wipe dry with a clean
cloth.
Check for electrolyte leaks.
Prepare the protection cap for installation:
Replace all the parts inside the protection cap with new ones
(except the grille), and place them in the order they were
removed.
The Tefzel washers, under the cap, should be slightly
lubricated with silicone grease.
Note: The illustration on the right is an example only. Your
configuration may differ.
Tighten the protection cap finger tight.
Then, complete the process using the tool provided in the
maintenance kit. Insert into each of the four holes in turn, and
tighten as far as possible. Tighten each hole only once.
Note: The grille inside the protection cap should be free to move
during tightening. Therefore, and to avoid damage to the membrane,
do not touch the grille during the tightening process.
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