Typical Vacuum Pressures In Ei Mode - Agilent Technologies 7200 Operation Manual

Typical Vacuum Pressures in EI Mode

Table 3 Influence of carrier and collision cell gas flows on vacuum
Column Flow
(mL/min) Rough Vac
0.5 1.16 * 10
0.7 1.18 * 10
1 1.22 * 10
1.2 1.24 * 10
2 1.32 * 10
3 1.42 * 10
4 1.50 * 10
Operation Manual
The largest influences on operating pressure in EI mode are the
carrier gas (column) and collision cell gas flows.
typical pressures for various helium and nitrogen collision cell
gas flows. These pressures are approximate and will vary from
instrument to instrument by as much as 30%.
CC Gas On
N2 = 1.5 mL/min
Quad Vac
-1 -5
3.41 * 10
-1 -5
3.41 * 10
-1 -5
3.43 * 10
-1 -5
3.43 * 10
-1 -5
3.44 * 10
-1 -5
3.44 * 10
-1 -5
3.46 * 10
If the pressure is consistently higher than those listed, refer to
the online help in the MassHunter Workstation software for
information on troubleshooting air leaks and other vacuum
problems.
Operating in Electron Impact (EI) Mode

Typical Vacuum Pressures in EI Mode

TOF Vac Rough Vac
-7
4.20* 10 8.29 * 10
-7
4.20 * 10 8.67 * 10
-7
4.22 * 10 9.17 * 10
-7
4.22 * 10 9.49 * 10
-7
4.22 * 10 1.07 * 10
-7
4.25 * 10 1.19 * 10
-7
4.27 * 10 1.29 * 10
Table 3
CC Gas Off
Quad Vac
-2 -7
3.17 * 10
-2 -7
3.45 * 10
-2 -7
3.79 * 10
-2 -7
4.06 * 10
-1 -7
5.17 * 10
-1 -7
6.51 * 10
-1 -7
7.84 * 10
3
lists
TOF Vac
-7
2.15 * 10
-7
2.15 * 10
-7
2.16 * 10
-7
2.16 * 10
-7
2.17 * 10
-7
2.20 * 10
-7
2.21 * 10
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