INFICON Explorer Portable Gas Chromatograph - Manual (Page 71)

Using Explorer
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.
4. Disable automatic analyzing by pressing Enter Menu, then SETUP, MODE,
AUTO, and ON/OFF. Use the arrow keys to select Off and then press Enter
Menu. Press Exit to close the box. Press Enter Menu to close the menu.
5. During a loop injection, Explorer will draw a sample through the sample in
port. Connect a gas bag containing some calibration gas to the sample in port.
A gas bag is included in the Field or Calibration Kit (MX380318, MX380348,
MX380338, MX380358, and MX380337)
6. Once the bag is connected, press Start Stop. If prompted to enter an analysis
tag, press YES and use the arrow keys to enter TEST. Press Enter Menu to
confirm the entry and start the analysis.
When the analysis starts, a message will be displayed indicating which column
and detector will be used. You will hear a beep when the sample is injected on
to the column.
The status line will now show a timer, a run number, the column and detector
in use. If you are in peak display, peaks will be added to the list as they are
integrated. If you are in compound display, concentrations of detected peaks
will be updated at the end of the analysis. In graph display, you can see the
chromatogram developing. Another line displays the fullscale range and the
analysis time.
Peaks are identified depending on what information is in the current library. If any
of the identified peak concentrations exceed the alarm level, stored in the library,
then the audible alarm may sound at the end of the analysis.
If an alarm is encountered, an alarm acknowledge box will open, press YES to
acknowledge the alarm condition and to silence the audible alarm.
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