Spectral Flatness Test; Spectral Flatness Evaluation - Agilent Technologies 1260 User Manual

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.
This test is part of the detector self test only, see
N O T E

Spectral Flatness Evaluation

Spectral Flatness Evaluation
Limit is < 0.002 AU
Test Failed
Probable cause
1
2
3
Agilent 1260 Infinity DAD and MWD User Manual
Old or non-Agilent lamp.
Defective DAM board
Defective optical unit.

Spectral flatness test

"Self-test" on page 162.
Suggested actions
• Run the Intensity Test.
• Exchange the lamp if old or defective.
Exchange the DAM board.
Exchange the optical unit.
9
Test Functions
177