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25. Rinse the sensor under a tap for about 5 seconds to remove any excess electrolyte, then gently
wipe with a soft tissue to ensure all parts are completely dry. Drain the overflow electrolyte from
the container into a sink and flush away. Discard the used container.
26. If not using a protection cap with grille proceed to step 27. Otherwise, take a new Dacron
patch from the box of O-rings in the recharge kit. Place the mesh in the center of the protection
cap. It is very important that the mesh is in the center of the protection cap and covering the
entire grille. Lower the sensor onto the protection cap making sure not to disturb the mesh.
27. Push the protection cap firmly into place, making sure one of the four slots in the protection cap
fits over the small locking pin (highlighted right). If it is necessary to turn the protection cap to fit
over the locking pin, ensure you only turn it clockwise to avoid unscrewing the cartridge.
28. Finally, screw the protection cap locking washer back into place in a clockwise motion, and
tighten finger tight.
5.4 Activation of the anode
In this process the central electrode (anode) is polished, and then treated with concentrated nitric
acid.
Do not to put acid on the newly chloridized cathode.
1. Follow the sensor face polishing instructions described in the sensor operator manual supplied
with the sensor.
2. Install the membrane support, finger tight, using the sensor mounting tool. Make sure the smooth
side with a groove faces out when installed.
3. Fill the sensor reservoir with water. This helps protect the new silver chloride layer in case any
nitric acid leaks into the reservoir.
4. Place a drop at a time of concentrated (approximately 70% by weight) nitric acid on the center of
the anode. Allow the acid to spread to the surrounding guard electrode. It is recommended to
leave the acid on the anode for about 30 seconds.
5. Wash off the acid, and repeat the procedure (applying drops of nitric acid) two more times.
6. Wash the sensor thoroughly with distilled water.
20 English
C A U T I O N
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