184 1220 Infinity II LC System User Manual
9
Test Functions and Calibration
Diode Array Detector (DAD)
Cell Test Evaluation
The Agilent ChemStation calculates the intensity ratio automatically. The
intensity ratio (typically between 0.5 and 0.7 for new standard flow cells and
0.1 to 0.3 for new mico- and high pressure cells) is dependent on the degree of
contamination of the flow cell windows, and on the type of flow cell used.
Figure 57 Cell Test Results (report) with no flow cell inserted
Test Failed (low ratio value)
This test can be used for the standard flow cells only. The nano flow cells will give very
low values due to their design.
Probable cause Suggested actions
1
Absorbing solvent or air bubble in flow cell.
Ensure the flow cell is filled with water, and
free from air bubbles.
2
Dirty or contaminated flow cell.
Exchange the flow cell windows.