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Instrument Maintenance Technical Manual - M100E UV Fluorescence SO2 Analyzer
212
10.3. MAINTENANCE PROCEDURES
The following procedures need to be performed regularly as part of the standard maintenance of the M100E.
10.3.1. CHANGING THE SAMPLE PARTICULATE FILTER
The particulate filter should be inspected often for signs of plugging or excess dirt. It should be replaced
according to the service interval in Table 10-1 even without obvious signs of dirt. Filters with 1 and 5 µm pore
size can clo
g up while retaining a clean look. We recommend handling the filter and the wetted surfaces of the
filter housing with gloves and tweezers. Do not touch any part of the housing, filter element, PTFE retaining ring,
glass cover and the O-ring with bare hands.
To change the filter according to the service interval in Table 10-1:
1.
Turn O
FF the analyzer to prevent drawing debris into the sample line.
2. Open the M100E’s hinged front panel and unscrew the knurled retaining ring of the filter assembly.
Figure 10-1: Sample Particulate Filter Assembly
3. Carefully remove the retaining ring, glass window, PTFE O-ring and filter element.
4. Replace the filter element, carefully centering it in the bottom of the holder.
5. Re-install the PTFE O-ring with the notches facing up, the glass cover, then screw on the hold-down ring
and hand-tighten the assembly. Inspect the (visible) seal between the edge of the glass window and the O-
ring to assure proper gas tightness.
6. Re-start the analyzer.
04515F DCN6048