Vacuum System; Rear Panel - Waters Xevo TQ-S Operator's, Overview And Maintenance Manual

Vacuum system

Two external roughing (rotary vane) pumps (a dry-pump option is available)
and three internal turbomolecular pumps create the source vacuum. The
turbomolecular pumps evacuate the analyzer and ion transfer region.
Vacuum leaks and electrical or vacuum pump failures cause vacuum loss,
which protective interlocks guard against. The system monitors the
turbomolecular pump speeds and continuously measures vacuum pressure
with built-in Pirani and Penning gauges. The gauges also serve as switches,
stopping operation when vacuum loss is sensed.
A vacuum isolation valve isolates the source sample cone from the mass
analyzer, allowing routine maintenance without venting.

Rear panel

The following figure shows the rear panel locations of the connectors used to
operate the mass spectrometer with external devices. For further details, see
Appendix B.
Mass spectrometer rear panel:
Collision cell
gas inlet
Source vacuum
Turbo vacuum
Pilot valve port
Nitrogen inlet Source vent
LA N
External Connections 1
10 9 8 7 6 5 4 3 2 1
Service Bus
OUT - IN IN
EPC Com Port
External Connections 2
10 9 8 7 6 5 4 3 2 1
Video Output
OUT - OUT OUT OUT
10 1
External Connections 1
10 1
External Connections 2
Auxiliary
10MB
Activity
/100MB
Roughing pump connections
TP03118
February 28, 2014, 715002212 Rev. C

Vacuum system

Shielded Ethernet
Event inputs
and outputs
Power connection
43