Corrective action
Possible cause
Fault
Check the connections of
the UV cell optical fibers.
Degas if necessary (we
recommend helium
sparging)
Air in the eluents
Ghost peaks
Clean the flow cell and
flow path
Dirt or residues in the flow
path from previous runs
Clean the column in accor-
dance with the column in-
structions
Residues in the column
from previous runs
Check that the mixer is
functioning correctly and
that the correct chamber
volume is being used (0.2
mL is default)
Bad mixing of the eluents
Check the chart recorder
in accordance with its
manual
The recorder not properly
set up
Error in external chart
recorder
Test the recorder function
by selecting recorder test
according to Monitor UV-
900 User Manual.
Monitor UV-900 not prop-
erly set up
7.3
Error messages
If the suggested actions do not correct the fault, call GE.
Description/Action
Message
Check the connections of the UV cell optical fibers.
Sample fiber failure
Check the liquid.
Make sure that there are no air bubbles in the system.
Clean the UV cell, see
Cleaning the flow cell, on page 60
Recalibrate by switching the instrument off and then
back to on, or choose Recalibrate in the Check menu.
Not calibrated
Calibration failed
Contact GE for xenon lamp exchange.
Change lamp
64
Monitor UV-900 Operating Instructions 28962214 AD
7 Troubleshooting
7.2 Faults and actions
