Hach-Lange ORBISPHERE 31xxx Basic User Manual - Manual (Page 12)

• The protection paper is opaque.
8. 9. 10. 11.
8. The membrane holding ring comes in two slightly different internal diameters, depending on the
membrane(s) total thickness (A = 29228 holding ring, membrane thickness < 50μ; B =
29229 holding ring, membrane(s) total thickness ≥ 50μ). For a correct membrane installation, be
sure to use the correct holding ring for the application.
9. Place the membrane holding ring on the installation tool tip.
C A U T I O N
To avoid damaging the membrane, make sure that the tool tip is totally clean and its surface is even.
10. Insert the installation tool inside the guiding sleeve.
11. 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.
12.
13.
14.
12. 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 is an example only. Your configuration may differ.
13. 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.
14. Always store the sensor with the storage cap and base installed. Put a few drops of clean water
in the storage cap to prevent the sensor cell drying.
Note: A sensor that has been taken apart or serviced must always be calibrated. Allow the sensor to settle for
30 minutes, before performing the sensor calibration.
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