INFICON HAPSITE ER Chemical Identification System - Manual (Page 446)

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HAPSITE ER Operating Manual
HAPSITE . . . . . . . . . . . . . . . . . . . . . A simple troubleshooting step will determine
if the contamination is in the HAPSITE as
well as the SituProbe. Disconnect the
transfer line from the HAPSITE and attach
the air-sampling probe. Perform a blank run
while sampling clean air or Nitrogen and
compare the background and/or
contamination peaks to the SituProbe
blanks. Repeat once or twice if necessary. If
the contaminant is only in the SituProbe, then
continue directly to the SituProbe cleanup
procedure below. If the contaminant is in the
HAPSITE, then the HAPSITE and SituProbe
will require the cleanup procedure. The
HAPSITE should be baked out by setting the
heated zones to higher temperatures for a
few hours, followed by blank runs using a
HAPSITE Loop method or a default
HAPSITE "cleanout" method (air-probe
sampling, Concentrator installed) as
appropriate.
SituProbe FLUSH. . . . . . . . . . . . . . . The SituProbe has a built-in FLUSH mode for
system cleanup. To prepare for this
operation, remove the transfer line at the
HAPSITE connection. Leave the transfer line
connected to the SituProbe. Remove the
probe head from the water vessel and lay it
on a clean surface. If possible connect the
SituProbe to a bulk Nitrogen cylinder,
although an on-board canister can be used
for shorter periods of time. Open the
SituProbe front door and press the FLUSH
switch. The SituProbe will increase the
temperatures of the heated zones and
actuate valves to Nitrogen flush all sample
pathways. This process will continue until the
FLUSH switch is pressed a second time or
the system runs out of Nitrogen gas. The
system should be flushed for a minimum of at
least one hour to as long as overnight,
depending on the level of contamination. An
installed Nitrogen gas canister will provide
approximately two hours of flush time. A bulk
Nitrogen cylinder is recommended for a
longer flush times.