INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 381)

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HAPSITE Smart Plus Operating Manual
Line Purge. . . . . . . . . . . . . . . . . . . . This Inlet State turns on the sampling pump
and pulls sample through the Probe and out
the exhaust vent, while bypassing the
Concentrator.
PreDesorb . . . . . . . . . . . . . . . . . . . . PreDesorb begins the process of heat
desorption of the analytes adsorbed on the
Concentrator prior to introduction onto the
GC column.
Desorb . . . . . . . . . . . . . . . . . . . . . . . This completes the desorption of analytes off
the Concentrator and onto the GC column.
The following Inlet States are only available in the Inlet States column when
the Headspace Sampling System (HSS) is enabled for use:
HSSample . . . . . . . . . . . . . . . . . . . . This Inlet State sets the valves of both the
HAPSITE and HSS. It turns on the sample
pump for analysis. The collection of the
sample trapped in the vial headspace sample
passes through the Transfer Line and to the
HAPSITE Analytical Module. The suggested
HSSample duration is approximately 15
seconds.
HSPurge . . . . . . . . . . . . . . . . . . . . . This Inlet state sets the valves for Nitrogen to
flow through the lines, the needle assembly
and then through the Transfer Line. This
removes moisture and cleans out the
previous sample. The needle should be
inserted into a clean, dry vial during purge.
HSConcDry . . . . . . . . . . . . . . . . . . . This Inlet State allows dry N
2
gas to flow
through the Transfer Line and Concentrator
to remove moisture prior to sample injection.
This should only be used if the Headspace
system is connected to an external cylinder
of Carrier Gas.
The following Inlet States are only available in the Inlet States column when
the SituProbe (SP) is enabled for use:
SPLinePurge . . . . . . . . . . . . . . . . . . This state sets the valves for Nitrogen to flow
through the lines and SituProbe assembly,
then through the transfer line. This cleans out
the previous sample. The recommended
event duration is at least 60 seconds to allow
for clearing the sample line of the previous
sample as well as good mixing with the
Internal Standard (if used).