Agilent Technologies 1260 User Manual page 172

9
Test Functions
Intensity Test
In case of low counts in one or more ranges, start the testing with the
comparison of values with flow cell vs. flow cell removed.
Contaminations of the cell windows and/or the lenses (there are 3 between
vis-lamp and flow cell), will reduce the light throughput.
If the detector fails in the range 501 nm - 950 nm, check
• is the VIS-lamp ON? If not, turn it on.
• is VIS-lamp glass bulb blackended or broken? If yes, replace VIS-lamp.
• 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
172
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
the test fails, exchange the flow cell windows.
Clean optical components with alcohol and
lint-free cloth or replace the parts.
Exchange the lamp.
Agilent 1260 Infinity DAD and MWD User Manual
"Cell Test" on page 179). If