Roche MagNA Pure Compact Instrument, Руководство оператора

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MagNA Pure Compact Operator’s Manual - Version 1.3 74
C
C
Instrument actions during the Leakage Test:
Note: As soon as Leakage has been confirmed, the State indicator will permanently show
LEAKY until the O-rings are changed and No Leakage has been confirmed.
At the beginning of the test, the robotic arm picks up the tips and moves to the
Sample/Internal Control Tube Rack. The arm aspirates 1 ml of water plus an
additional 100 µl of air from the sample tubes.
The stage moves the empty Elution Tubes under the Nozzle Head.
The Nozzle Head moves to a position directly in front of the Magnetic Plate and
raises the nozzles until the water meniscuses in the Reaction Tips are even with
the upper rim of the Magnetic Plate.
The Nozzle Head holds this position for 10 min. While the Nozzle Head is holding
position, open the instrument door, so you can more easily observe the Nozzle
Head.
Watch the water level within the Reaction Tips. If the water level remains the same
in all tips, none of the tips is leaking. If you observe different water levels in diffe-
rent tips or drops of liquid falling into the sample tubes, one or more nozzles is
leaking. As a final check, visually inspect the empty Elution Tubes for liquid, as
well as the Nozzle Head. If there has been leakage, change the O-rings as
described in Section C.1.2.2.
Note: Some leakage can be tolerated. If, after 10 minutes, the difference in water
levels between tips is less than 4 mm, you do not need to change the O-rings.
After 10 min, close the instrument door.
Result: The instrument will eject the water back into the Sample Tubes and the
Reaction Tips are placed back in the Tip Tray.
After the Leakage Test is complete, the Leakage Test Result screen is displayed.
䉴
Touch the appropriate button to
document the test results.
䉴
Touch the Close button to return
to the MAINTENANCE Screen.
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User Maintenance
Leakage Test
MagNA Pure Compact Manual.book Seite 74 Dienstag, 28. Februar 2006 4:16 16