Agilent Technologies 1220 Infinity II LC User Manual page 178

9
Test Functions and Calibration
Diode Array Detector (DAD)
• does the UV-lamp show a reflective coating towards the VIS-lamp? If yes,
Example (measured without flow cell):
VIS-LAMP OFF or defect:
VIS-LAMP ON and OK:
Test Failed
Probable cause
1
2
3
4
If the lamp fails in a single range there might be no reason to change the lamp if the
N O T E
application is not run in that specific range.
Redo the test with removed flow cell. If the counts increase drastically (more than a factor
of 2, then flow cell components are contaminated and may require maintenance/service.
If the intervals of lamp replacements are getting shorter, the Agilent service should check
the optical unit for contaminated components in the light path (coupling lens, source lens,
cell support assembly and flow cell windows).
178
replace UV-lamp.
Absorbing solvent or air bubble in flow cell.
Dirty or contaminated flow cell.
Dirty or contaminated optical components
(achromat, windows).
Old or non-Agilent lamp.
110 counts
13613 counts
Suggested actions
Ensure the flow cell is filled with water, and
free from air bubbles.
Run the cell test (see
If the test fails, exchange the flow cell
windows.
Clean optical components with alcohol and
lint-free cloth or replace the parts.
Exchange the lamp.
1220 Infinity II LC System User Manual
"Cell Test" on page 184).