Hach Flo-Dar, User Manual

Page: 36 / 44

34
Maintenance
5. Refill the canister tube with yellow desiccant beads (Cat. No. 875500). Inspect the
O-ring (Cat. No. 5252) on the bottom cap for cracking, pits, or evidence of leakage.
Replace if necessary.
Note: Applying O-ring grease to new or dry O-rings improves the ease of insertion, sealing, and life
span of the O-ring.
6. Make sure that the O-ring is clean and free of dirt or debris before replacing the end
cap.
7. Reinstall the end cap.
5.5 Hydrophobic filter description
A single Teflon
®
hydrophobic filter (Cat. No. 3390) is installed in the top of the canister to
prevent liquid from entering the vent tube.
For best performance and to avoid grease buildup on the filter during submergence or
surcharge conditions, hange the canister vertically so that the end cap points downward
(
Figure 18 ).
Note: The hydrophobic filter may need replacement at any time the cartridge is submerged or
exposed to excess moisture. Refer to
Hydrophobic filter replacement procedure on page 35 .
Figure 18 Removing the bottom end cap
1 End cap 3 Retaining clip
2 Retaining clip slots 4 Dessicant container