8 Setting the Analytical Parameters and File Management
8.1 [SET] Key Main Screen
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GC-2014
PURGE FLOW RATE
Range: Refer to Fig. 12.2.15, Default: 3.0 ml/min
Set the septum purge flow rate.
SAMPLING TIME
Range: 0.00−9999.99 min, Default: 1.00 min
Sets the sampling time for splitless analysis.
The sampling time indicates the period of time after analysis starts until the split flow line is
opened.
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. 12.2.2.) after the sampling
time elapses.
DIRECT: Closes the split flow line and the set column inlet pressure (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 (for direct injection mode), 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: 0.0−400.0 °C, Default: 25.0 °C
Set the injection port temperature (the default temperature for a programmable injection
port).
• DETECTOR TEMP
Range: 0.0−400.0 °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.
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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