Agilent Technologies 5977B Series Operating Manual page 18

1 Introduction
Vacuum gauge
The MSD may be equipped (or ordered) with an ion vacuum gauge. The Agilent
MassHunter GC/MS Acquisition software can be used to read the pressure
(high vacuum) in the vacuum manifold. Operation of the gauge controller is
described in this manual. The gauge is required for CI operation.
Table 3
Feature
High vacuum pump
Optimal He column flow
mL/min
Maximum recommended 
gas flow mL/min
Maximum gas flow, mL/min
Max column id
CI capability
Inert ion sources available
GC compatibility
Foreline pumps available
DIP
* Total gas flow into the MSD: column flow plus reagent gas flow (if applicable). Based
† Expect degradation of spectral performance and sensitivity.
‡ Turbo pump models are field upgradeable to CI.
** Direct insertion probe.
18
5977B Series MSD features
*
†
‡
**
capability (3rd party)
on helium gas use. For other gases the maximum flow will vary.
Diffusion Turbo
1 1 to 2
1.5 4
2 6.5
0.25 mm (30 m) 0.53 mm (30 m)
No Yes
Yes Yes
6890/7820/7890 7890 Series
Series
Pfeiffer Duo 2.5 Pfeiffer Duo 2.5, MVP-070-3,
MVP-070-3C, IDP3 24V
Yes Yes
5977B Series MSD Operating Manual
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