Thermo Scientific TSQ Altis, Руководство по оборудованию

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12
Maintaining the MS on a Daily Basis
Before Operating the Mass Spectrometer
Thermo Scientific TSQ Altis, Quantis, and Fortis Hardware Manual 45
Table 8. TSQ Fortis typical pressure readings
4. Use the following table if the pressure is too high or is decreasing.
Table 7. TSQ Quantis typical pressure readings
Pressure (Torr)
Conditions Source Pressure
(foreline, ion transfer
tube, RF lens region) Analyzer
(analyzer region after
pumping for at least 12
hours)
Collision gas off, ion transfer
tube orifice sealed Less than 0.05 Less than 6 × 10
–
6
Collision gas off, ion transfer
tube orifice open Less than 3.5 Less than 9 × 10
–
6
Collision gas set to 1.5 mTorr,
ion transfer tube orifice open Less than 3.5 Approximately 3 × 10
–
5
Pressure (Torr)
Conditions Source Pressure
(foreline, ion transfer
tube, Tube lens/Skimmer
Region Analyzer
(analyzer region after
pumping for at least 12
hours)
Collision gas off, ion transfer
tube orifice sealed Less than 0.05 Less than 6 × 10
–
6
Collision gas off, ion transfer
tube orifice open Less than 2.0 Less than 9 × 10
–
6
Collision gas set to 1.5 mTorr,
ion transfer tube orifice open Less than 2.0 Approximately 3 × 10
–
5
Table 9. Troubleshooting high or low vacuum pressure
If the pressure reading ... Do this ...
Is high (above 5 × 10
–
5
Torr in the
analyzer region), and you have restarted
the system within the last 30 to 60
minutes
Wait an additional 30 minutes and recheck
the pressure.
Decreases with time Check the pressure periodically until it is
within the typical pressure range of the MS.
Remains high • Inspect the vacuum lines and fittings
external to the MS for leaks and repair.
• If you suspect an air leak within the MS,
contact Thermo Fisher Scientific.