The vacuum control allows low viscosity fluids, even water, to be
consistently dispensed without dripping between cycles. The vacuum
exerts a negative pressure on the liquid in the barrel and prevents
dripping.
For these tests, you will use the test barrel with the clear fluid.
1. While holding the barrel upright in one hand, remove the orange
end cap and insert the blue LV Barrier
™
. Allow an air gap as
shown.
2. Attach the barrel to the 10cc adapter. Snap the safety clip tightly
closed to prevent any dripping or bubbling. Remove the tip cap
and attach the 30 gage (lavender) tip.
3. Set air pressure at 5 psi.
4. Press
RUN/SETUP
to go into
SETUP
mode and set
TIME
for 00.05
seconds. Press
RUN/SETUP
to return to RUN mode.
5. Press
STEADY/TEACH
(
STEADY
indicator light on).
6. With the barrel pointing downward over a container, unsnap the
safety clip and press the foot pedal to fill the tip.
7. If a drop begins to form at the end of the tip, slowly turn the
vacuum control knob counterclockwise to stop the drop from
growing. Wipe the tip and adjust vacuum as necessary.
8. To read vacuum pressure, press
PRESSURE/TIME
so that system
air pressure is displayed. Hold toggle switch in the "up" position
to view vacuum pressure. Release toggle to return display to
system air pressure readout.
9. Press
STEADY/TEACH
(
STEADY
indicator light off).
10. Take the barrel and place the tip on the test sheet. Press the foot
pedal and release. Check the dot size. Increase or decrease by
adjusting pressure or time.
Remove
orange
end cap.
Insert
blue LV
Barrier
™
How to use the Vacuum Control
Remove
tip cap.