User guide

36 Advanced User Guide
2 Configuration
Inlets and outlets
The pressure control devices at the inlet and outlet ends of a
column, or series of columns in a flow path, control its gas flow.
The pressure control device is physically attached to the column
through a connection to a GC inlet, a valve, a splitter, a union, or
other device.
Similar considerations apply for the column outlet end. When a
column exits to a splitter, select the GC’s pressure control
source attached to the same splitter.
Unspecified PCM A, B, and C
Aux PCM A, B, and C
Front inlet
Back inlet
Other
Table 1 Choices for column configuration (continued)
Inlet Outlet Thermal zone
Table 2 Column inlet end
If the column gas flow source is: Choose:
An inlet (SS, PP, COC, MMI, PTV, VI, or other) with electronic
pressure control
The inlet.
A valve, such as gas sampling The auxiliary (Aux PCM) or pneumatics (PCM) control
module channel that provides gas flow during the inject
cycle.
A splitter with an EPC makeup gas supply The Aux PCM or EPC channel that provides the makeup gas
A device with a manual pressure controller Unknown
Table 3 Column outlet end
If the column exhausts into Choose:
A detector The detector.
A splitter with a makeup gas supply The Aux PCM or EPC channel that provides makeup gas
flow to the splitter.
A device with a manual pressure controller Unknown