5–6 Series 3080 Electrostatic Classifiers
is only able to reach 15 L/min in Dual Blower mode due to the high
pressure drop across it.
DMA-Voltage
The rod voltage is the primary setting that controls the particle size
exiting the DMA. This control can be set from 0 to 10,000 volts for
any of the DMAs. As you change the voltage setting, the Particle
Diameter pane is updated to reflect the calculated particle size
based on voltage, DMA type, flow rate, temperature and pressure.
The smallest internal digital voltage step possible is:
10,000/65535 = 0.1526 volt
Particle Diameter
The Particle Diameter is calculated based on voltage, DMA type,
flow rate, temperature, pressure and a single charge assumption.
However, a powerful feature of the Classifier controller is that you
can directly enter a particle diameter and the nearest voltage
setting will be appeared in the voltage pane and the DMA voltage
will be controlled to this setting. This allows you to easily set
particle size without consulting curves or tables.
Multifunction Pane
The multifunction pane, as the name suggests, provides a variety of
read-only secondary information. By pressing on the control knob
in this pane you can rotate through six different selections of
information. The information displayed can be locked by pressing
on the control knob again. The choices available are:
Bypass Flow Rate
Absolute Pressure (based on an internal pressure tap near
Sheath Flow port)
Sample Flow Rate (Impactor Pressure is displayed if Pressure
Drop is selected from the menu)
Electrical Mobility
Particle Size Range
Sheath Flow Temperature