Model T200U-NOy Option Manual Addendum
24 07303C DCN6646
6.2 Replacing the Sample Particulate Filters The particulate filter should be inspected often for signs of plugging or
contamination. It is also common for dirt particles to cause instrument drift, and
affect accuracy.
To check and change the filter:
1. Fold down the 501Y front panel.
2. Locate both filters on the left and right side of the 501Y front panel. See
Figure 3 for an exploded view of the filter assembly.
3. Visually inspect the filter through the glass window.
4. If the filter appears dirty, unscrew the hold-down ring, remove the Teflon o-
ring and then the filter.
5. Replace the filter, being careful that the element is fully seated in the bottom
of the holder. Replace the Teflon o-ring, then screw on the hold-down ring
and hand tighten.
NOTE:
Handle the wetted surfaces as little as possible and clean with cloth prior to assembly