How To Use The Vacuum Control; 1000Xl Only - EFD 1000XL Operating Manual

How to Use the Vacuum Control

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 with the clear fluid.
1. While holding the barrel upright in one hand, remove the orange
end cap and insert the white SmoothFlow
press the piston down to contact the liquid.
Be sure to push it far enough to remove all air, but
fluid, since this will force the fluid up along the sides of the piston.
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 timer to #5, then turn on timer bypass.
4. With the barrel pointing downward over a container, press the
foot pedal to fill the tip.
5. Turn off the timer bypass switch (yellow light out).
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 slowly adjust vacuum. Normally, only
1 to 2 psi of vacuum pressure is necessary.
7. Take the barrel and place the tip on the test sheet. Press the foot
pedal and release. Check the deposit. Increase or decrease by
adjusting pressure or time.

(1000XL only)

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piston. Carefully
not into the
Remove
orange
end cap.
Insert
SmoothFlow
piston.
Remove
tip cap.
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