9-2 Model 3022A Condensation Particle Counter
Replace it at least once a year (two are supplied in the accessory
kit). Follow these six steps.
1. To replace the tube filter, first disconnect the fill bottle and drain
the liquid from the CPC so you can tip it on end.
2. Remove the covers at the top and bottom of the cabinet.
3. Find the filter plug on the bottom of the CPC (Figure 9-1): the
filter plug is on the lower right-hand side of the sensor housing.
4. Unscrew and remove the plug.
5. Pull out the filter tube and replace it with a new filter
(Figure 9-2). Make sure the tube is centered and fits snugly
inside the mounting hole.
Figure 9-1
Locating the Filter Plug on the Bottom of the CPC: (a) Power Supply PC Board;
(b) Filter Plug; (c) Front Panel