User`s guide

Operation
103
NOTE: The GC Cycle Time enables the system to initiate
desorption of the next tube while the current sample is
being chromatographed. This setting is intended to ensure
that the current run has finished in time for the trap
desorption of the next sample.
NOTE: Laboratory temperatures can strongly influence the GC
oven cool-down time and can vary (for example,
overnight). The GC cycle time setting should take into
account the longest oven cool-down time expected during
the analytical sequence.
The ATD will use this value to calculate when to load the next tube.
If you are running an ATD, the cycle time will be used to determine
at which time the next tube should be loaded in order to run tubes
successively without wasted time in between samples.
In this case the ATD will not wait for a GC Ready signal before it
begins to desorb the tube. Once, the trap is ready for desorption, the
ATD waits for the GC Ready signal. You must set this time
accurately as your sample will be retained on the trap until the GC
becomes ready.
Relays—This dialog box provides access to the timed events for the
relays on the Options board. See Timed Events on page 183 for
details on connecting remote accessories and programming the On
and Off times.
The Options Tab
The Options tab provides access to the ATD/TD method options.
Select the options that you have installed or that are required to
complete your method.