INFICON Explorer Portable Gas Chromatograph - Manual (Page 73)

Using Explorer
Performing a Syringe Injection Analysis
Selecting the Injection Method
Explorer can accept both manual syringe and automatic sample loop injections. You
must calibrate using the same injection technique as your sample. If you are using
automatic loop injection for sampling, calibrate using loop injection. If you are using
syringe injection for sampling, calibrate using syringe injection.
To select the injection method:
1. Press Enter Menu, then SETUP, MODE, and INJECT.
2. Press SYRINGE and press Enter Menu to set the option and to close the
menu.
The sampling method will be indicated in the status line as SYR.
Performing a Syringe Injection Analysis
1. Ensure carrier gas is supplied to the instrument.
2. Ensure the plugs have been removed from the following ports: Detector 1 and 2
out, pump out and vent out.
3. Monitor the offset level in the status display box.
If it is above 800 mV or if the offset level is falling, allow the instrument to
stabilize for about an hour. If this does not bring the signal down, flush the
column for a few hours or overnight, as described in Flushing the Columns
starting on page 250.
NOTE: If you are using the ECD, you will also need to monitor the ECD offset level. Press
DISPLAY, STATUS, GC, and DET. When prompted to change views to the ECD,
press Enter Menu. Monitor the offset level in the status display box. If it is above
800 mV or if the offset level is falling, allow the instrument to stabilize for about an
hour. If this does not bring the signal down, flush the column for a few hours or
overnight.
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