Unpacking and Setting Up 2-7
Filling the Bottle with Fluid
Pour the fluid into the fill bottle to at least one-third full. Because of
the shut-off fittings, the liquid will not flow into the CPC until the
connections are made and the instrument is warmed up.
The standard CPC uses butanol as a working fluid. Use reagent-
grade n-butyl alcohol (commonly referred to as “butanol”) to refill
the instrument.
Note: Butanol is not supplied with the CPC. Butanol may be
purchased from scientific chemical-supply houses.
!
Caution
Butanol is flammable. It is also potentially toxic if inhaled. Use butanol only in a
well-ventilated area. If you smell butanol and develop a headache, or feel faint or
nauseous, leave the area at once. Ventilate the area before returning.
Changing the Inlet
The inlet of the CPC can be moved to allow sampling from the back
panel, the front panel, or the side of the cabinet. When shipped, the
CPC is configured to sample from the front panel.
The shortest, most direct aerosol path is from the side of the
cabinet. This configuration minimizes particle loss due to impaction
or diffusion. If you are using the low-flow mode and sampling from
the cabinet’s side, you may eliminate the T fitting and replace it
with a connecting fitting to eliminate the dead air trapped in the
bypass flow tube. The connecting fitting is not included in the
accessory kit and must be purchased separately.
To change the location of the inlet, follow these four steps.
1. Remove the top and bottom covers of the cabinet: first, remove
the twelve black screws (six on each side). Then lift the top cover
off of the sensor. Next, lift up the sensor by the side handles and
move it away from the bottom cover. Remove the handle on the
inlet side of the instrument by loosening the four securing
screws.
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