Shimadzu GC-2014, Instruction Manual

Page: 143 / 318

12 Injection Port
12.2 Split/Splitless Injection System
131
GC-2014
CARRIER GAS TYPE
Selection: He/N2/H2/Ar, Default: He
Specify the carrier gas type supplied to the AFC.
This parameter is used for the measurement/control of the flow rate.
If this parameter is not set correctly, flow rate calculations may not be performed
correctly.
(Example: If this parameter is set to “N
2
” when He is actually used, the displayed total
flow rate, column flow rate and linear velocity are lower than the actual values.)
1. Set the column inlet pressure and total flow rate so that they are within the ranges shown in
Fig. 12.2.5.
The ranges differ according to the columns to be used and purge flow rates.
2. The column flow rate ranges from 0 to the value at which the calculated column inlet pressure is
970 kPa or less and the calculated total flow rate is 1,200 ml/min.
3. The linear velocity ranges from 0 to the value at which the calculated column inlet pressure is
970 kPa or less.
Fig. 12.2.5 Available setting ranges for the AFC
NOTE
360
ml/min
720
ml/min
1200
ml/min
290 kPa 590 kPa 970 kPa
Column inlet pressure
150 kPa
Available setting ranges (He, H
2
)
For He and H
2
Total flow rate
Primary
pressure
980 kPa
Primary
pressure
600 kPa
Primary
pressure
300 kPa
150
ml/min
300
ml/min
600
ml/min
290 kPa 590 kPa 970 kPa
Column inlet pressure
Available settable ranges (N
2
)
Total flow rate
For N
2
Primary
pressure
980 kPa
Primary
pressure
600 kPa
Primary
pressure
300 kPa