3-2 Model 3076 Constant Output Atomizer
Selecting and Preparing the Solution
Select a solute for generating the aerosol. Common solutes for solid
particles are sodium chloride, uranine, and methylene sucrose; for
oil particles are dioctyl phthalate (DOP) and olive oil. The
recommended solvent for solid particles is fresh distilled water; for
oil particles, use clean, reagent-grade alcohol.
Usually 0.0001 gram of solute per cubic centimeter of solvent is
convenient for most applications; in the case of a liquid, however,
use 0.0001 cubic centimeter of solute per cubic centimeter of
solvent. Refer to Chapter 5 for information on the relationship
between particle size and solute concentration.
Setting Up and Modifying the Model 3076
Atomizer
This section describes how to set up the Model 3076 for operation
in conventional recirculation mode (recommended for water-based
solutions) or nonrecirculation mode (recommended for volatile-
based solutions).
Before You Begin
The tubing you use to connect the Atomizer to the bottle and to the
air supply is provided but must be measured and cut. The ½-inch
conductive tubing is also provided for the polydisperse aerosol
coming out from the Atomizer block to minimize particle losses to
the walls of the tubing due to static charge.
Setting Up in the Recirculation Mode
In the recirculation mode, the 1-liter bottle (with white plastic cap)
acts as the reservoir for the solution.
The 1-liter bottle is pre-assembled for use in the recirculation
mode. The cap has three fittings: one delivers solution to the
atomizer block, one returns excess solution to the bottle from the
Atomizer, and the other is the pressure relief valve. The smallest
fitting has a hose barb on the outside; on the inside, this fitting is
soldered to a stainless steel tube that protrudes into the bottle.
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