Sorting Question

From: Vincent Falco (vincent.falco@es.nemc.org)
Date: Sun Jun 29 1997 - 10:20:18 EST


My problem is this:During some sorts I get ,what I will call a spurious extra 
drop. To explain more,there are times I sort to polycarb filters.When all is 
well I get a single spot which contains the desired cell population.When all 
is supposed not well I get my desired single spot with cells and just about a 
quarter of inch from the desired spot I observe a spurious spot,which does 
not contain the desired cells.I maintain the nozzle on a strict PM cleaning 
schedule and watch for clogs etc.during times of sorting.The drive frequency 
remains constant during a sort and is generally consistent day to day.The 
amplitude level requires adjustment during a sort run.Should I be suspect 
that the amplitude level is giving the problem? Can anyone suggest other 
potential problem areas.Can anyone give rules/guidelines they follow when 
establishing drop drive frequency and amplitude level?Thanks.



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