Feed tube
During fractionation, the tube rack can be moved forward one tube with the instruction
FeedTube.
1
Select menu System Control:Manual:Frac in UNICORN.
2
Select the instruction FeedTube in the Frac list.
3
Click on the Execute button. The tube rack moves on to the next tube after the set
delay volume has been collected.
Ignore_LastTube
The tube position in the rack which is defined in the start protocol to have the last tube
can be ignored with the instruction Ignore_LastTube.
When the last tube is reached and there are more fractions to collect, an alarm is gen-
erated and the system is paused. You can then fill up with new tubes, and use the instruc-
tion Ignore_LastTube.
1
Select menu System Control:Manual:Frac in UNICORN.
2
Select the instruction Ignore_LastTube in the Frac list.
3
Click on the Execute button.
4
Fill up the rack with new tubes.
42 Frac-920 and Frac-950 Operating Instructions 28-9622-09 AC
4 Operation
4.3 Fraction Collector Frac-950
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