Standalone Control
Setting the run parameters
96
Injection
Set this switch to specify the speed of the syringe plunger during the injection
strokes and whether or not the syringe needle stays in the inlet after injection
of the sample. This enables you to reduce the average speed of the plunger by a
factor of 18 and, with a split/splitless inlet, hold the syringe needle in the inlet
for 4 seconds after the injection. This is in combination with setting the
on-column mode to “no.” The plunger speed during the pump and waste
dispensing strokes does not change.
When you are using the on-column injection mode, this switch changes only
the speed of the plunger (no dwell is involved).
Note: With on-column injection, the carriage speed is always slower than with
other inlets.
Figure 54. Switches for setting the injection speed
Down
Up
Sample
in needle
Switch setting
Fast, no dwell
Slow, with dwell
inj:
fast
slow