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Diagnostics and Troubleshooting
Error Messages
Table 22 Invalid Data Points In Spectrum
Possible Causes Action
Blank has higher absorbance than sample
measurement. Solvent or chemical matrix of
blank has higher absorbance than
solvent/matrix of sample.
Ensure sample and blank use the same
solvent or chemical matrix.
Measure blank on water.
In kinetics mode of ChemStation software:
1 Under Options & Information in the
Method menu, select Adjust gains
separately from blank measurement.
2 Under Set Gains in the Measure menu,
select water or air
Bubble in flow cell absorbing during blank. Use cell cleaning fluid to prevent air bubbles
sticking on the window surface of the flow
cell.
Floating particle(s) in cell Clean cell or wait untill particle(s) have
settled
Variation in sample absorbance during the
measurement process due to chemical or
physical processes.
Select a shorter integration time.
Fluorescent sample. Use fixed gain settings in your advanced
software for the Agilent ChemStation.
This feature is not implemented in the
software of the handheld controller.
Electronics failed. Replace the spectrophotometer data
acquisition (SDA) board.
Replace optical unit.
Bad blank. Repeat blank measurement.
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