Hach ORBISPHERE C1100 User Manual page 24

Maintenance and Troubleshooting
A sensor recharge kit is required as it contains all the components necessary for this membrane
replacement and sensor head cleaning process. Refer to
Note: It is advisable to perform this procedure with the plastic sensor base installed so as to avoid any
damage to the connection socket and also to provide a suitable stand for the sensor when required.
1. Hold the main body of the sensor and unscrew the protection cap locking washer by turning
counter-clockwise. Remove it from the sensor and put to one side.
2. Pull/twist off the protection cap and put to one side. If you are using a protection cap with a
grille, then remove the Dacron® mesh from inside the cap and discard it.
3. Hold the sensor with the membrane facing down to avoid spilling any electrolyte, then
carefully unscrew the old cartridge. Drain the old electrolyte into a sink and flush away.
Discard the old cartridge and membrane. Remove the cotton washer and silicone disc from
the top of the anode and discard.
4. Rinse the sensor head under a tap for 15 seconds to remove any remaining electrolyte and
shake dry. With a soft tissue gently clean around the guard area (indicated right) and then
wipe off any excess moisture from the sensor to ensure all parts are completely dry. Repeat
this rinse and dry process with the protection cap.
5. Clean the anode using the cleaning tool supplied. Place the tool over the sensor head.
Clean by rotating the cleaning tool over the sensor head for a few seconds, in a clockwise
direction only.
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3.1.3 Sensor recharge kit on page
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