Agilent Technologies 6890 Series Service Manual

220 Purged/Packed Inlet
Theory of operation
2 of 20
Jun 2001
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Figure 220-1 EPC control packed column inlet (flow control mode — recommended
for packed columns)
The flow controlled mode shown above is used when no column dimensions
are configured in the 6890 GC.
Figure 220-2 EPC control packed column inlet (pressure control mode —
recommended for capillary columns)
The pressure controlled mode shown above is used when capillary column
dimensions are configured in the 6890 GC.
Flow
limiting
frit
Proportional
valve
(PV1)
Flow
sensor
Pressure
sensor
Septum holder
Septum purge
regulator (not
adjustable)
Total fl ow
control loop
To C ol umn
and Detector
Purge Vent Flow
1.0 mL/min
FS
PS
SPR
Flow
limiting
frit
Proportional
valve
(PV1)
Flow
sensor
Pressure
sensor
Septum holder
Septum purge
regulator (not
adjustable)
To Co lu mn
and Detector
Purge Vent Flow
1.0 mL/min
FS
PS
SPR
Inlet pressure
control loop

Agilent Technologies 6890 Series Specifications

General

Brand	Agilent Technologies
Model	6890 Series
Category	Laboratory Equipment
Language	English