TSI Instruments 9302, Owner'S Manual

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1
M O D E L 9 3 0 2
S i n g l e - J e t A t o m i z e r
D e s c r i p t i o n
The Model 9302 Single-Jet Atomizer is an aerosol generator specifically
designed to align and check out laser velocimeters (LV). A supply of
laboratory compressed air is connected directly to the input of its built-in
pressure regulator; the pressure gauge shows the air pressure at the
output side of the pressure regulator.
In this aerosol generator, the compressed air expands through a small
orifice (0.5 millimeter in diameter) in the form of a high-velocity jet located
in the jet-nozzle assembly. The jet creates an area of low pressure near
the orifice which, in turn, causes the liquid in the reservoir to be sucked up
into the orifice. The liquid is then broken into tiny liquid droplets and the
compressed air carries the droplets through the outlet tube.
To perform laser velocimeter checkout, direct the atomizer’s output tube at
the point of beam-crossing. Adjust the height of the output tube by
loosening the hex nut and shifting the tube up or down. The Atomizer is
designed primarily for LV system checkout and should not be used to feed
aerosols into a system under pressure.
O p e r a t i o n
Connect the ¼-inch-dimeter (6.35 mm) compressed air hose to your
laboratory air supply. Fill the reservoir half-full with the selected liquid. Set
the pressure regulator to 25 pounds per square inch (172 kPa). The
aerosol output rate is a function of the pressure setting and the atomizer
can be operated at any pressure between 5 and 55 pounds per square
inch (34 and 379 kPa, respectively). The table below shows the
relationship between pressure, as indicated by the pressure gauge, and
output rate. Note that the atomizer outlet is open to the atmosphere.
Relationship Between Input Pressure and Aerosol Output Rate
Pressure Aerosol Output
Psi
kPa L/min
5 34.5 2.4
10 68.9 3.7
15 103 4.7
20 138 5.7
25 172 6.6
35 241 8.3
45 310 10.2
55 379 12.0