EFD ULTIMUS V User Manual page 15

Using Timed Mode to Make Repeatable Deposits
1. Refer to the previous section to purge your dispense tip of air and fill it with fluid.
2. Place the unit into "Timed" mode.
3. Set the dispense time. The dispense time or duration may be set in one of two ways:
• Using the Up/Down Arrows to set time. Refer to the " Features and Controls " section.
• Using the Program/Teach button to set time. Refer to the " Features and Controls " section.
4. Press the foot pedal/finger switch to activate the dispense cycle. The dispenser will now continuously
dispense for the pre-set duration of time. Once the time has expired, the dispenser will stop dispensing
and await another triggering signal from the foot pedal/finger switch or signal from the host controller.
Note: The foot pedal/finger switch only needs to be pressed for a moment.
If the foot pedal/finger switch or contact closure I/O signal is initiated at any time during the dispense cycle,
the dispenser will immediately abort and stop dispensing. This is a unique safety feature to prevent
accidental dispensing.
Using the Vacuum Control Feature for Low Viscosity Fluids
The Vacuum Control feature allows you to dispense low viscosity fluids consistently without dripping
between cycles. The vacuum overcomes head pressure on the fluid within the barrel,
which prevents dripping.
1. Make sure that you have attached an EFD syringe barrel filled with the fluid
intended for dispensing, and that the air pressure is set all the way to zero. EFD
recommends the use of a Blue LV Barrier piston for watery, low viscosity materials.
2. Make sure the barrel adapter safety clip is closed.
3. Remove the tip cap and replace it with an appropriate EFD dispense tip.
4. Set the air pressure at 2 psi (0.1 bar)
5. While pointing the tip over a container or resting it on a test surface, release the
safety clip on the adapter/Optimeter™ hose assembly.
6. Place the dispenser in "Steady" mode. Depress and hold the foot pedal until a drip
begins to form at the end of the tip.
7. Release the foot pedal. At this point, fluid will continue to exit the tip.
8. Increase the vacuum using the keypad by 0.5 to 1.0 inches of water until the fluid
deposit size stabilizes without growing.
Note: Do not increase the vacuum to the point where the deposit is actually drawn back into the tip or to
where bubbles form in the barrel. Excessive vacuum causes inconsistent dispensing.
9. Lift the tip off the test surface, wipe the tip end and retest by pressing the foot pedal momentarily.
The deposit should stay at the intended size and not increase or decrease in size. If it does, repeat
steps 4-8 to fine-tune the vacuum control.
10. Once vacuum is properly set increase air pressure to the desired production setting before beginning
your dispensing process.
Dispensing
System
Setup
LV Barrier
Air gap
1/2 maximum fill
15