3-4 Model 3750 Condensation Particle Counter
External Vacuum Port
The air flow containing butanol vapor exhausts from this fitting at the back
panel of the CPC. House vacuum or a pump should provide at least 60 kPa
(18 in. Hg) vacuum and 1.0 L/min critical volumetric flow at the inlet of each
CPC. If a pump is used to provide vacuum for the 3750, the pump exhaust
should be directed away from the work area using tubing connected to the
outlet. A charcoal filter can be used on a temporary basis to capture
butanol vapor from the exhaust. Charcoal filters can be ordered through
TSI (P/N 1031492 and P/N 1031493).
Butanol Drain Port
This port is used to drain the working fluid (butanol) from the liquid
reservoir and is used when collecting water extracted using the Water
Removal system.
Instrument Cooling Fan
This fan cools internal electronics and dissipates heat generated during
cooling of the condenser. The fan is provided with a guard. Clearance
should be provided around the fan and side surfaces of the instrument to
allow good circulation of cooling air.
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