Hach AV9000 Manual Del Usuario página 15

Replenish the sensor oil
Inspect the oil in the sensor for large air bubbles before installation and during customer-scheduled
service duty cycles. Large bubbles can reduce the anti-fouling properties of the oil. Small bubbles (<
¼-in. diameter) do not affect the oil properties. To replenish the sensor oil, refer to the instruction
sheet included with the Oil Kit (7724800).
Replace the hydrophobic filter
®
A single Teflon filter in the top of the canister prevents liquid from entering the vent tube. Inspect the
hydrophobic filter after cartridge submerserion or exposure to excess moisture. Install a new filter if
necessary. If the filter becomes submerged, or surcharge conditions exist, hang the canister
vertically to avoid grease buildup. Make sure the end facing the sensor points downward.
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