Problem Verification

Perform the following steps to diagnose whether the lamp is the cause of the baseline instability:

Ensure that the detector has been properly warmed up, see Overview of Diagnostic Signals.
Flush the flow cell with water and start runs without sample injections (blank runs).
Use a restriction capillary to remove any influence of the column.
If you see instabilities, stop the flow and compare.
1. If there are no instabilities, it’s detector related and a replacement of the trigger pack assembly (first) and lamp (second) is required.
1. If there are still instabilities, check the system in front of the FLD (for example for air leaks).