Shutting Down The Detector; Short-Term Shutdown (Interruption Of Operation) - Thermo Scientific Vanquish VF-D20 Operating Manual

6.8

Shutting Down the Detector

6.8.1

Short-Term Shutdown (Interruption of Operation)

Vanquish Charged Aerosol Detectors Operating Manual
If the detector will not be operated for some time, follow the
instructions on shutting down the detector in this section.
TIP The Chromeleon software provides procedures for automatically
preparing the chromatography system for shutdown. The procedures
include, for example, operations for reducing the flow rate, reducing the
temperature in temperature-controlled devices, and turning off the
detector lamps.
For information about Smart Shutdown and Smart Standby, refer to the
Chromeleon Help.
To interrupt operation of the detector for a short period (short-term
shutdown), for example, overnight, observe these guidelines for the
Vanquish system modules, as required by your system arrangement:
•
For your Vanquish detector, note the following:
♦ Charged aerosol detector:
Check that sufficient gas is available to continue gas flowing
through the detector. This is to prevent any build-up of residue
from solvents or analytes. Gas must be flowing when pump flow
is delivered to the detector.
♦ UV/VIS detector:
The lamp(s) in the detector can remain turned on and the
shutter in the light path before the flow cell can be closed.
♦ Fluorescence detector:
Turn off temperature control for the flow cell.
•
Apply a flow of 0.05 mL/min and have the pump deliver an
appropriate solvent.
Check the lower pressure limit for the pump and adapt the value if
necessary. If the pressure falls below the lower limit, the pump stops
the flow.
•
Set the injection valve in the autosampler to the Inject position.
•
Make sure that the temperature of the column does not exceed
40 °C.
When resuming operation, let the flow equilibrate and verify that the
operating parameters for the other system modules are set as required
before proceeding.
6 • Operation
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