Operation
Setting the run parameters
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Caution Do not set the volume parameter for splitless inlets more than 2 µl. Larger
volumes cause sample to be lost through the purge vent and may contaminate
carrier inlet lines.
Dwell time
This setpoint specifies the time delay of the needle in the inlet for both pre- and
post-injection. This adds the following changes to the injection parameters:
• Preinjection dwell: Time delay of the needle in the inlet before the plunger
is depressed to inject sample. When preinjection dwell is selected, one
stop of air is drawn after the sample for volume settings from 1–4 stops.
With a setpoint of five stops, no air is drawn.
• Postinjection dwell: Time delay after injection before needle is withdrawn
from the inlet
The allowable range for both dwell times is 0–1 minute in increments of
0.01 minute.
Priority samples
This setpoint specifies whether the arm of the tray should look for a priority
sample in position 100 between runs. If the feature is turned on, the tray checks
position 100 before each regular vial in the sequence. If a vial is in position 100,
the tray arm delivers the vial to the injector turret. After the injection, the tray
arm places the vial in position 99.
If you are using the priority sample feature, use only tray positions 1 to 98.
Slow injection
This setpoint specifies the speed of the syringe plunger during the injection
stroke and whether or not the syringe needle stays in the inlet (dwell time)
after injection of the sample. It enables you to reduce the average speed of the
plunger from about 100 µl/sec to about 5 µl/sec (with a 10-µl syringe). This
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