INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 380)

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HAPSITE Smart Plus Operating Manual
Backflush . . . . . . . . . . . . . . . . . . . . This Inlet State sets the GC valves so that
carrier gas is directed to the input of the
analytical column and into the output of the
precolumn. The Backflush state provides the
ability to customize the GC method so
volatile compounds that pass quickly through
the precolumn and onto the analytical
column, during the Foreflush state, can be
separated from less volatile compounds. The
less volatile compounds are pushed back out
of the precolumn, while the more volatile
compounds of interest are separated on the
analytical column for MS analysis.
ISTune . . . . . . . . . . . . . . . . . . . . . . . This state sets the GC valves so the Internal
Standard gas is directed to the Mass
Spectrometer for MS tuning.
Survey . . . . . . . . . . . . . . . . . . . . . . . This Inlet State sets the GC valves and turns
on the sampling pump so the sample will
by-pass the GC and be directed to the inlet of
the MS for real time analysis.
NOTE: Survey is the Inlet State used (by
default) in the Survey and Direct
Sample, Single Compound
Methods. This cannot be changed.
Other . . . . . . . . . . . . . . . . . . . . . . . . This allows the customization of each
specific GC valve for a custom GC valve
state. Useful for GC troubleshooting.
Standby . . . . . . . . . . . . . . . . . . . . . . This Inlet State must be included in every
Method as the last state. Standby closes the
Membrane Isolation valve and turns the
Mass Spectrometer filament off.
The following additional Inlet States are available in the Inlet States column when
a Concentrator is being used:
ConcFill . . . . . . . . . . . . . . . . . . . . . . Equivalent to Loopfill, when a Concentrator is
installed the sample passes through the
Concentrator.
ConcCooldown. . . . . . . . . . . . . . . . This Inlet State provides a Duration Value
that allows the Concentrator cool down to a
desired operating temperature.