1-4
Model 3090/3090AK Engine Exhaust Particle Sizer
TM
Spectrometer
B a c k P a n e l
As shown in Figure 1-3, the back panel of the Model 3090 has power and
data connections, an analog and trigger input/output connection, an
aerosol inlet, outlet, and a cooling fan.
Fan Guard/Filter
Inlet/Cyclone
Outlet
Location for SN
and service labels
AC Connector and
Switch
RS-232 Serial Port
Analog & Trigger
Input/Output
Figure 1-3
Back Panel of the EEPS Spectrometer
Heat Exchanger Fan
This fan keeps the sheath air temperature stable, near the ambient air
temperature. It is provided with a guard and removable filter that should be
cleaned periodically.
