INFICON Explorer Portable Gas Chromatograph - Manual (Page 210)

Method Development
208
The TVOC pressure setting will be the same as the last GC column method. When
you switch between TVOC and GC modes there is no wait time while the pressure
stabilizes at a new value.
You can operate the TVOC mode at 14 psi. This will increase sensitivity and reduce
the TVOC analysis time allowing faster TVOC cycling. When you switch back to
the GC method, the pressure will change to that specified by the GC method.
You may have to wait a few minutes while
Explorer adjusts the pressure and
stabilizes the flow rates.
The default analysis time is 40 seconds. This is suitable for pressure settings
between 8 and 14 psi. At 14 psi the TVOC peak elutes quickly and the analysis time
could be reduced if faster cycling is required.