Long-Term Shutdown - Thermo Scientific Vanquish VH-D10 Operating Manual

6.10.2 Long-Term Shutdown

Shutting Down the Device
Diode Array Detectors (VH-D10)
Operating Manual
• For flow cells, note the following:
If the pump flow is interrupted and the lamp is turned on,
¨
protect the flow cell from the light of the lamp: Close the shutter
in the light path before the flow cell, or turn off the lamp.
If the pump flow is stopped for a longer time, or if the flow cell is
¨
to be shipped or stored, observe the steps in
Cell (} page 129).
• When resuming operation, let the flow equilibrate and verify that
the operating parameters for the other system modules are set as
required before proceeding.
To interrupt operation for a longer period, follow the instructions below.
TIP Shutting down the device affects the operation of the system. When
shutting down the device, also observe the shutting down instructions
for the other Vanquish system modules and take appropriate action
(refer to the Operating Manuals for the modules).
1. Turn off the UV lamp.
2. Stop the pump flow.
3. Remove the column from the flow path and replace it by a union
connector (for example, the Viper union from the system ship kit)
4. Restart the pump flow.
5. Flush the flow cell with an appropriate solvent (minimum HPLC-
grade). Observe the following:
Situation after If no additive is used
Shutdown
Device and flow cell Flush the system, for
remain in the example with methanol.
laboratory after 100% acetonitrile should
shutdown not be used.
6 • Operation
Removing the Flow
If an additive is used
Flush the system with several
volumes of methanol and
water (50:50) (for example,
1.0 mL/min for 10 minutes with
the standard system) to
prevent salt buildup in the
fluidics. If the solvents in the
flow cell are not miscible with
water, use an appropriate
intermediate solvent.
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