Agilent 1260 Infinity DAD and MWD User Manual 177
Test Functions
9
Spectral flatness test
Spectral flatness test
The spectral flatness test determines the maximum noise (in mAU) on the
spectrum. The test is run with the flowcell removed to eliminate effects due to
absorbing solvent or a dirty flowcell. First, a detector balance is done. Next, a
spectrum (no flowcell) is taken.
Theoretically, the spectrum should be flat, however, in practice, noise is
superimposed on the spectrum. The amplitude of the noise is a measure of the
optical and electronic performance.
Spectral Flatness Evaluation
Spectral Flatness Evaluation
Limit is < 0.002 AU
Test Failed
NOTE
This test is part of the detector self test only, see “Self-test” on page 162.
Probable cause Suggested actions
1 Old or non-Agilent lamp.
• Run the Intensity Test.
• Exchange the lamp if old or defective.
2 Defective DAM board
Exchange the DAM board.
3 Defective optical unit.
Exchange the optical unit.
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