Hach 911, Руководство пользователя

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64
Maintenance
7.8.5 Replacing the Desiccant
Note: Replacing the desiccant does not require that the desiccant container be removed from the
desiccant box.
1. Twist the bottom end-cap using a slight twisting motion until its slots align with the
retaining clips (
Figure 38 ).
2. Remove the end cap gently by grasping it and pulling it straight out.
3. Pour the desiccant beads out of the canister.
4. Hold the canister up to the light and inspect the hydrophobic filter.
• If there is a small, dim light spot while looking through the hole, the filter is in good
condition. If there is a bright light spot, the filter is probably torn. Replace the filter.
• If the desiccant beads are completely saturated with water or the filter has been
saturated with water or grease, replace the filter.
Note: If the filter needs to replaced, complete the Replacing the Hydrophobic Filter
( section 7.8.5.1 on page 65 ), then continue with step 5.
5. Refill the canister tube with blue desiccant beads (Cat. No. 3624). Inspect the O-ring
(Cat. No. 5252) on the bottom cap for cracks, pits, or evidences of leakage. Replace if
necessary.
Note: Applying O-ring grease to the 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.
Figure 38 Removing the Bottom End Cap
1 End Cap 2 Desiccant Container