30 BD LSR II User’s Guide
• Sample injection tube—stainless steel tube that carries sample from the
sample tube to the flow cell. This tube is covered with an outer sleeve that
serves as part of the droplet containment system.
• Tube support arm—arm that supports the sample tube and activates the
droplet containment system vacuum. The vacuum is on when the arm is
positioned to the side and off when the arm is centered.
Droplet Containment System
The droplet containment system prevents sheath fluid from dripping from the SIP
and provides biohazard protection.
When no sample tube is installed on the SIP, sheath fluid backflushes through the
sample injection tube. This backflush helps prevent carryover of cells between
samples. The droplet containment system vacuum is activated when the sample
tube is removed and the tube support arm is moved to the side. Sheath fluid is
aspirated as it backflushes the sample injection tube.
If a sample tube is left on the SIP with the tube support arm to the side (vacuum
on), sample will be aspirated into the waste container.
LSR2.book Page 30 Tuesday, April 25, 2006 3:34 PM
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