Specifications

22
How to Use the Vacuum Control
(Fig. 1)
Remove
orange
end cap
Insert LV
Barrier
™
Making Timed Deposits of Watery-thin Fluids
(1500XL, 1500XL-15, 1500XL-CA 1500DV, 1500DV-15)
The vacuum control allows low viscosity liquids, 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 25 gage (red) tip.
3. Set air pressure at 5 psi, and the time at 0.14 (Fig. 1) .
4. Press the timer bypass button (dashes appear).
5. With the barrel pointing downward over a container, unsnap the
safety clip. Then press the foot pedal to fill the tip.
6. 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. Nor-
mally, only 1 to 2 psi of vacuum pressure is necessary.
7. Press the timer bypass button to return to the preset dis-
pense time (Fig. 1) .
8. Take the barrel and place the tip on the test sheet. Press the foot
pedal. Check the dot size. Increase or decrease by adjusting
pressure or time.
014
.
Remove
tip cap
Air gap