166 Agilent 1260 Infinity DAD and MWD User Manual
9 Test Functions
Slit Test
Slit Test
The slit test verifies correct operation of the micromechanical slit. During the
test, the slit is moved through all slit positions while the detector monitors the
lamp intensity change. When the slit position is changed, the intensity drop
(move to smaller slit) or intensity increase (move to larger slit) must be within
a defined range. If the intensity changes are outside the expected range, the
test fails.
Slit Test Evaluation
Slit Test Evaluation
Limit: 0.7 - 1.3
Test Failed
Probable cause Suggested actions
1 Flow cell still installed.
Remove the flow cell.
2 Old or non-Agilent lamp.
Run the “Intensity Test” on page 170. Exchange
the lamp if old or defective.
3 Defective slit assembly (stray light).
Exchange the slit assembly.
4 Defective detector main board.
Exchange the detector main board.
5 Defective optical unit.
Exchange the optical unit.
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