Shimadzu GC-2010 Plus - Page 57

3 AFC, APC
3.4 AFC and APC control
37
GC-2010 Plus
Fig. 3.4.1 Split control
Flow rate
sensor
CARRIER IN
(GC rear)
PURGE VENT
SPLIT VENT
Column oven
(50 )
TFC
(Total Flow Controller)
Pressure sensor
SPC
(Septum Purge Controller)
ESC
(Electronic Split Controller)
Valve “b” Sensor “a”
Valve “b” is controlled so that the value of
sensor “a” remains constant.
Detector
49.6 kPa
71.6 ml/min
3 ml/min
66.9 ml/min
71.6 ml/min
3 ml/min
66.9 ml/min
1.67
ml/min
Pressure sensor
Injection
port
P
S
C
P
C
Column inner diameter : 0.30 mm
Column length : 25.0 m
Film thickness : 0.50 µm
Carrier gas : He
Split ratio : 40 = 66.9 ml/min / 1.67 ml/min
(split flow rate)(column flow rate)