Specifications

10
How to Use the Vacuum Control
Making Timed Deposits of Watery-thin Fluids
(Models 900, 900-15, 900-CA)
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 fluid in the barrel and prevents
dripping.
For these tests, you will use the test barrel supplied with the clear fluid.
1. While holding the barrel upright in one hand, remove the orange
end cap ❶ and insert the blue LV Barrier
™
❷. Allow an air gap
as shown.
2. Attach the barrel to the 10cc adapter ❸. Snap the safety clip
tightly closed to prevent any dripping or bubbling. Remove the
tip cap ❹ and attach the 25 gage (red) tip.
3. Set air pressure at 5 psi.
4. Press the timer bypass switch (yellow light on).
5. With the barrel pointing downward over a container, unsnap the
safety clip. Then press the foot pedal to fill the tip.
6. Set the timer at #5. Press the timer bypass switch again
(yellow light out).
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. 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.
Insert LV
Barrier
™
Remove
tip cap
Air gap
Remove
orange
end cap
❸
❶
❷
❹
Attach
10cc adapter