
214 BD FACSAria II User’s Guide
Changing Nozzles
As a general guideline, the nozzle size should be at least three times the diameter
of the particle to be sorted. Four sizes of nozzles are provided with your
cytometer: 70, 85, 100, and 130-Pm nozzles. The size is marked on the nozzle.
The closed-loop nozzle used for cleaning and shutdown procedures is also
changed with this procedure.
1 Turn off the stream and open the flow cell access door.
2 Turn the nozzle-locking lever 90° coun ter-clockwise, and pull the nozzle
out of the cuvette flow cell (Figure 6-17).
To a void losing t he O-ring , hold th e nozzle steady and pull it straight out
without tilting it from side to side. If you do not see the O-ring on the
nozzle, it could be stuck to the cuvette. To locate and remove the O-ring,
wet the wooden end of a cotton swab and use it to wipe the inside of the
nozzle well. Use the magnifying glass in the accessory kit if necessary.
Figure 6-17 Nozzle-locking lever
3 Insert the new nozzle into the flow cell.
Any cytometer surface that comes in contact with biological specimens can
transmit potentially fatal disease. Use universal precautions when handling
sorting hardware. Wear suitable protective clothing and gloves.
nozzle-locking
lever
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