7
Daily Operation
Before Operating the Orbitrap Fusion Series System
Thermo Scientific Orbitrap Fusion Series Hardware Manual 63
To fix an air leak
1. Shut down the system (see “Shutting Down the Mass Spectrometer Completely” on
page 52).
2. Visually inspect the vacuum system and vacuum lines for leaks.
3. Check each fitting and flange on the system for tightness, and tighten the fittings or
flanges that are loose.
Do not tighten fittings indiscriminately. Pay particular attention to fittings that have been
changed recently or to fittings that have been subjected to heating and cooling.
Checking the Gas Supplies
Check the helium gas tank’s regulator. Make sure that there is sufficient gas for the analysis,
which is a minimum of 3447 kPa (500 psi) on the high pressure gauge of the regulator. If
necessary, replace the tank. Verify that the pressure of helium gas reaching the mass
spectrometer is 275 ±70 kPa (40 ±10 psi). If necessary, adjust the pressure with the tank
pressure regulator.
Check the nitrogen gas supply on the regulator of the nitrogen gas tank or liquid nitrogen
boil-off tank. Make sure that there is sufficient gas for the analysis. If necessary, replace the
tank. Verify that the pressures of nitrogen gases reaching the mass spectrometer are as follows:
• 690 ±140 kPa (100 ±20 psi) for the HP nitrogen gas pressure
• 345 ±70 kPa (50 ±10 psi) for the UHP nitrogen gas pressure
If necessary, adjust the pressures with the tank pressure regulators.
For more information about gas requirements, refer to the Orbitrap Fusion Series
Preinstallation Requirements Guide.
Note When operating 24 hours and 7 days a week, typical daily consumption of nitrogen
gas is as follows:
• UHP nitrogen: approximately 46 L/day (1.62 ft
3
)
• HP nitrogen: 11 500–26 700 L (406–943 ft
3
)
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