
242 BD FACSAria II User’s Guide
Fanning around center
or side streams
Nozzle inserted improperly Turn off the stream. Remove the
nozzle and ensure that the O-ring
is in place. Re-insert the nozzle
and slide the nozzle in until it
stops, then close the locking lever.
Sweet Spot is off Turn on the Sweet Spot.
Incorrect sort precision mode Verify that the sort precision mode
is appropriate for your sorting
requirements. See Sort Precision
Modes on page 73.
2nd, 3rd, or 4th Drop values
not optimized
Adjust the 2nd, 3rd, and 4th Drop
settings to tighten the center
stream and fine-tune the side
streams.
Particles too big for nozzle Change the nozzle. See Changing
Nozzles on page 214.
Sort button disabled Current tube pointer not set
to current tube
Click to move the current tube
pointer to the appropriate tube.
Population not listed in
Add menu on sort layout
Population defined using
snap-to gate
Redefine the population using
another gate type.
Viewing sort layout for
another tube
Open or create a sort layout for
the current acquisition tube.
Sort layout counters not
updating
Viewing sort layout for
another tube
Open or create a sort layout for
the current acquisition tube.
High sort conflict rate Event rate is too high for
drop drive frequency
Decrease the event rate.
Gating conflict Verify the gating hierarchy.
Purity mask is too high Decrease the purity mask.
Erratic sort rate Flow rate is too high Decrease the flow rate.
Sorting Troubleshooting (continued)
Observation Possible Causes Recommended Solutions
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