Thermo Scientific FOCUS GC, Инструкция по эксплуатации

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Chapter 5
Split/Splitless Injector (S/SL)
S/SL Inlet Parameters
112 Instruction Manual
OPERATING SEQUENCE
Programming the Surge Splitless Mode
In surge splitless mode, a carrier gas pressure surge activates during the injection
phase for a preset time. This surge accelerates the transfer process of the
substances from the injector to the column. The pressure pulse starts in the
Prep Run phase and ends at the end of the surge duration you program.
Before you begin programming, do the following:
• Verify that a column is correctly installed, the correct liner is in the injector,
and the system is free of leaks.
• Program the carrier gas flow as described in Chapter 3.
Proceed as follows:
Use
INC
and
DEC
keys to increase or decrease the parameter values.
1. In Main Menu move the cursor until Inlet is selected. Press
ENTER
to display
the
INLET
menu.
2. In the Mode line select
Surge Splitless
.
3. Scroll to
Temp
and set the appropriate value.
4. Scroll to
Split Flow
and enter the desired value.
5. Scroll to
Splitless Time
and enter the time the inlet valve should be
closed.
6. Scroll
Surge pressure
and enter the value of the pressure surge.
7. Scroll to
Surge duration
and enter the duration of the pressure surge.
8. If constant septum purge is required, scroll to
Constant Septum Purge
and set On to activate a constant septum purge. If constant septum purge is not
required, set the Constant Septum Purge Off. Scroll to
Stop Purge For:
and enter the time the purge flow should be interrupted.