2–14 Series 3080 Electrostatic Classifiers
Figure 2-11
Releasing the Nano DMA Base Bracket
Tubing
The Nano DMA requires tubing to carry aerosol and sheath air
between the Classifier and the DMA. There are two different modes
to connect the Nano DMA to the Classifier: the Single Blower mode
and the Dual Blower mode. The Single Blower mode uses one
internal blower for the clean sheath air and the other for bypass
flow to minimize the diffusion loss at the DMA inlet. The Dual
Blower mode connects two internal blowers in series to drive the
clean sheath air up to 20 L/min to reduce diffusion loss and
narrow down the DMA transfer function. No bypass flow is used in
this mode. See Chapter 5
for more details.
Single Blower Mode
For Single Blower mode, refer to Figure 2-12 and Table 2-4 as you
follow the steps listed below to install the DMA tubing:
1. The accessory kit contains flexible, conductive tubing that
allows you to quickly configure the Classifier for use. Cut
appropriate lengths of tubing as listed in Table 2-4.
2. Attach the
3
⁄8 to ¼-inch tubing adapter from the accessory kit to
the Polydisperse Flow inlet on the Nano DMA.
3. Connect tube #1 from the Classifier port marked
POLYDISPERSE FLOW to the DMA port marked
POLYDISPERSE FLOW.
4. Connect tube #2 from the Classifier port marked SHEATH
FLOW to the DMA port marked SHEATH FLOW.
5. Connect tube #3 from the Classifier port marked EXCESS
FLOW to the DMA port marked EXCESS FLOW.
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