6
System Shutdown, Startup, and Reset
Placing the Mass Spectrometer in Standby Mode
Thermo Scientific Orbitrap Fusion Series Hardware Manual 51
3. If your LC/MS system includes an LC pump, turn off the liquid flow to the API source.
When controlling the LC pump through the Xcalibur data system, use the Direct Control
dialog box to turn off the solvent flow. For example, to turn off the solvent flow from an
Accela™ pump, do the following:
a. In the Xcalibur Instrument Setup window, click the icon for the LC pump.
b. In the menu bar, choose pump model > Direct Control to open the Direct Control
dialog box (Figure 36).
Figure 36. Direct Control dialog box (Instrument Setup window)
c. Click the tab for the LC pump, and then select the Take Pum p Under Con tr ol
check box.
d. Click the Stop button.
4. In the Tune window, place the mass spectrometer in Standby mode.
The center of the selected power mode icon changes from white to green. The System
LED on the front panel turns yellow. To keep the API source clean, the mass spectrometer
reduces the auxiliary and sheath gas flows to their standby default settings (2 arbitrary).
The mass spectrometer turns off the electron multiplier, conversion dynodes, 8 kV power
to the API source, main RF voltage, and ion optic RF voltages. For a more complete list,
see “On/Off Status for MS Components Under Varying Power Conditions.”
Select this
check box.
Start and Stop
buttons
CAUTION Hot surface. Allow heated components to cool to room temperature
(approximately 20 minutes) before you touch or service them.
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