8-8 Model 3772/3771 Condensation Particle Counter
6. To access the saturator base on the bottom panel, tilt the CPC on its
side so it is lying on the table. Place paper towels on the table under
the saturator base to absorb any butanol that spills out. Do not turn it
upside down.
7. Remove the
three screws
which hold the
base in the
saturator block
as shown in
Figure 8-5.
Release the
handle in the
base by
loosening the
thumbscrew.
Remove
Screw
Release
Saturator
8. Using the saturator
handle, pull the
saturator base straight
out. The wick is
attached and will be
removed with the
base. It will be snug
but avoid using a
twisting motion.
9. Remove the 2-inch
screw securing the
wick to the base as
indicated in
Figure 8-6. Pull the
wick straight off the
base. Avoid using a
twisting motion
because the wick is
keyed onto the base
with dowel pins and
the soft wick material
can rip.
Figure 8-6
Removing the Wick from the Saturator Base
10. Place the wick in the plastic bag and seal the bag. Replace the
saturator base in the CPC prior to shipping. This will prevent the
aerosol path from becoming contaminated. Re-secure the inlet tube.
The wick can be dried by putting it in a vacuum for three hours.
However, it is not necessary to dry the wick before putting it back into
the saturator block after the shipment.
11. To install a wick back into the CPC, confirm that four O-rings on the
saturator base are in place and undamaged. Replacement O-rings are
provided in the accessory kit if an O-ring on the saturator base
becomes lost or damaged. Figure 8-7 shows the two outer O-rings
(P/N 2501172, 2501569) and Figure 8-8 shows the two inner O-rings
(P/N 2500021).
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