8 Setting the Analytical Parameters and File Management
8.1 [SET] Key Main Screen
85
GC-2010 Plus
SPLIT MODE
Selection: SPLIT/SPLITLESS/DIRECT, Default: SPLIT
SPLIT: Controls the column inlet pressure and the total flow rate so that the column inlet
pressure and split ratio occur as specified.
SPLITLESS: Closes the split flow line during the sampling time so that the set column inlet
pressure is controlled by the Total Flow Controller.
Opens the split flow line and controls the Electronid Split Controller so that the
preset column inlet pressure occurs (Refer to Fig. 12.5.2.) after the sampling
time elapses.
To set the time of the Splitless auto off, refer to “16.6.11 Other Settings” in
“16.6 GC Configuration”.
DIRECT: Closes the split flow line and the set column inlet pressure, linear velocity (in
pressure mode) or the set total flow rate (in flow mode) occurs. When making
direct injection analyses, select WBI in the setup screen so that SPLIT mode is
not available.
CONTROL MODE
Selection: PRESS/VELOCITY/FLOW (FLOW is for direct injection mode only), Default: PRESS
When the injection mode is set to “SPLIT” or “SPLITLESS”
PRESS: Controls the system so that the column inlet pressure remains constant.
VELOCITY: Controls the system so that the linear velocity remains constant.
When the injection mode is set to “DIRECT”
PRESS: Controls the system so that the column inlet pressure remains constant.
VELOCITY: Controls the system so that the linear velocity remains constant.
FLOW: Controls the system so that the flow rate remains constant.
INJECTION PORT TEMP
Range: 0.0−450.0 °C, Default: 25.0 °C
Set the injection port temperature (the default temperature for a programmable injection
port).
DETECTOR TEMP
Range: 0.0−450.0 °C (in FID), Default: 25.0 °C
Set the detector temperature.
Allowable temperature ranges vary for each detector. Refer to range specified for the detec-
tor(s) in use.
TCD has two heated zones.
Upper row: PRE-TCD
Lower row: TCD (TCD cell)
Changes to one temperature are reflected to the other temperature. These set values are
always same.
1 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.
2 The linear velocity ranges from 0 to the value at which the calculated column inlet pressure is 970 kPa
or less.
3 The purge flow rate ranges from 0 to the total flow rate subtracted by the column flow rate and the split
flow rate.
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