Reference
Varian, Inc.
User Manual Micro-GC
Page 65
The real
analysis (run)
and data-
acquisition is
started.
Pressure
time
Sample Time
pressurisation
time
inject time
equilibration time
run time
initial pressure
download
method
run started
start data acquisition
run finished
inject
Fixed
equilibration-delay
of 40 ms. This
time allows the
sample to settle in
the sample-loop
After the run sampling is
begun. This means that the
sample is (mostly) sucked into the
sample-loop.
During
injection time
the sample is
transported to
the column by
the carrier gas
Pressurisation
delay (120 mS), used
to pressurize the
sample to the same
pressure as the
column head
pressure.
Cycle with static (electronic) pressure
This time diagram will help you to understand the Static (electronic) pressure cycle of the Micro-GC .
The run can be started,
when the is ready (Ready
LED is lit).
The Workstationsoftware will
wait until data is received
from the Micro-GC.
Before a run is
started all used
method-
parameters must
be downloaded
via the
Workstation
After the
specified run-time
has elapsed, the
run is finished.
NOTE:
This description is only for one channel. In most
cases a dual-channel system is used; in this situation the
sequence is the same, but the timing-settings can differ. If the
sample-time on channel A and channel B are different, the
longest time is used for both channels. Also the run-time can be
specified per channel; the data-acquisition stops per channel as
soon as the run-time has elapsed. The total analysis-time
depends on the longest run-time.
Summary of Contents for Micro-GC 490-GC
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