Installation manual

72 5975 Series MSD Operation Manual
3 Operating in Electron Impact (EI) Mode
If the pressure is consistently higher than those listed, refer to the online help
in the MSD ChemStation software for information on troubleshooting air leaks
and other vacuum problems.
Table 13 Micro-Ion Vacuum Gauge Reading
Column flow rate,
mL/min
Gauge reading, Torr
Performance turbo
pump
Gauge reading, Torr
Standard turbo
pump
Gauge reading, Torr
Diffusion pump
Foreline reading, Torr
Diffusion pump
0.5 3.18E–06 1.3E–05 2.18E–05 34.7
0.7 4.42E–06 1.83E–05 2.59E–05 39.4
1 6.26E–06 2.61E–05 3.66E–05 52.86
1.2 7.33E–06 3.11E–05 4.46E–05 60.866
2 1.24E–05 5.25E–05 7.33E–05 91.784
3 1.86E–05 8.01E–05 1.13E–04 125.76
4 2.48E–05
6 3.75E–05