KANOMAX 3800 Handheld Condensation Particle Counter - Manual (Page 36)

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- Cleaning and Replacing the Felt
The felt and mesh inside the alcohol cartridge can be changed in the field.
The CPC is supplied with two sets of spare felts and meshes. Normally, the felt does not require
replacement unless any of the following conditions occur.
1. The “ALCOHOL ERR” message appears on the screen even when the CPC is used only for a
short period.
→ This may happen when the CPC is used in an environment with extremely high humidity
for a prolonged period, or when moisture has accumulated in the felt.
2. The felt is contaminated with dust, dirt or oil.
→ This should not happen when the CPC is used in normal ambient air , however, if the CPC
is used for sampling particles other than those normally found in ambient air (e.g., use in
boiler rooms, or sampling combustion aerosols), the felt may become contaminated and
require replacement.
3. The mesh inside the alcohol cartridge is plugged.
- How to Replace the Felt
1. Before removing the felt, dry the alcohol of the felt by placing the cartridge in a clean and low
humidity environment.
2. Remove the felt from the cartridge by holding the cartridge with both hands with your hands
near the seam of the cartridge, and apply pressure as to separate the cartridge. The cartridge
will separate into two pieces and you will see the white felt.
3. When separated into two, push the felt and mesh out of the cartridge cylinder from the
opening at the end by using the felt removal tool (small wooden stick), and replace them with
the supplied new felt and mesh.
4. Confirm that the felt and mesh are clean.
The felt may have some light brownish (or yellowish) discoloration. This is normal and will not
influence the performance of the instrument. If the discoloration of the felt is severe, discard
the felt and replace it with a new felt.
Hold the mesh up to the light and make sure that all holes of the mesh are clean. If any of the
holes are clogged, clean them by blowing air through the mesh. If the mesh cannot be cleaned
completely, it should be replaced with a new mesh.
1. 2.
If moisture accumulates in the alcohol cartridge, the felt must be removed and dried, and then
reinstalled in the cartridge. When the alcohol felt and/or mesh is obviously contaminated, it
should be replaced.
Though some discoloration of the felt may be found, this is normal and will not influence the
performance of the CPC.