Pumping System - Agilent Technologies 6490 Manual Book

Agilent Triple Quadrupole MS and Sensitivity 3

Pumping system

Pumping system

6490 Triple Quadrupole
The 6490 has two roughing pumps and a three-stage turbo pump
for the first five vacuum stages. The two roughing pumps are
needed to decrease the pressure in the Dual Ion Funnel. The
second turbo pump is added to the last vacuum stage to help
pump out the gas load coming from the hexapole field axial field
focusing curved collision cell.
Figure 31 6490 Triple Quadrupole Pumping System
6460 and 6430 Triple Quadrupole
A single roughing pump and three-stage turbo pump are used
for the first four vacuum stages. This is achieved by partitioning
the turbo pump to create the multiple vacuum stages. The
second turbo pump is added to the fourth vacuum stage to help
pump out the gas load coming from the enhanced collision cell.
The turbo pumps are backed by a single roughing (mechanical)
pump (Figure 32).
Agilent 6400 Series Triple Quad LC/MS Concepts Guide 63