ThermoFisher Scientific Vanquish VH-D10, Operating Manual

Page: 141 / 196

7 • Maintenance and Service
Vanquish Diode Array Detectors (VH-D10) Operating Manual Page 141
7.9 Diagnostic Cell
When problems with the baseline noise, baseline drift or during
wavelength validation occur, install the diagnostic cell and use it to
identify the cause:
• If the problems disappear with the diagnostic cell
The problems are caused by the LightPipe flow cell that was
previously installed or the flow path or components in the flow path
before the detector.
• If the problems remain with the diagnostic cell
The detector or the UV lamp is defective.
For details on the possible causes for the problems, refer to the
System Troubleshooting
section in the
Vanquish System Operating
Manual
.
7.9.1 Installing the Diagnostic Cell
Parts required
LightPipe diagnostic cell
Preparations
1.
If the UV lamp is turned on
Close the shutter in the light path before the flow cell.
-or-
Turn off the UV lamp.
2. Proceed as required:
♦ If a flow cell is installed
Remove the flow cell from the detector.
♦
If the cover is installed to the flow cell opening on the detector
a) Turn the rotating locks on the cover of the flow cell opening
on the detector counterclockwise until they are in a
horizontal position.
b) Remove the cover from the flow cell opening. Keep the
cover to close the flow cell opening when no flow cell is
installed in the detector.