Setup For Testing - EFD 900 Operating Manual

Setup for Testing

Power switch should be off.
The amount of material dispensed each cycle depends on the
combination of air pressure, time of air pulse, viscosity of material
and dispensing tip size.
Note: The following steps refer to the 900 dispenser. For the
900-15 and 900-CA dispensers, refer to "Making Timed Deposits of
Watery-thin Fluids" on page 10.
The first step is to remove the tip cap from the pre-filled barrel of blue
test material (twist and pull). Replace it with an 18 gage (green)
tapered dispensing tip. Press the tip on and twist clockwise to lock.
Pull out air pressure regulator knob until it "clicks" into the unlocked
position. Turn clockwise to adjust the air pressure to 30 psi (2.1 bar)
for the initial tests .
Always set the pressure desired by turning the air regulator knob
clockwise. To reduce the pressure, turn the knob counterclockwise
until the gauge reads a lower pressure than desired. Then increase
and stop at desired pressure. Push knob in to lock.
Set time control to #7. Dispense cycle time increases from 0.01
second minimum to 1.0 second as knob is turned clockwise.
Be sure vacuum control is turned off (turn clockwise) for initial tests.
Press power switch to turn on the dispenser. It will light green.
Press timer bypass switch . It will light yellow. In this operation
mode, the timer will be bypassed to fill the dispensing tip before you
begin testing. A continuous flow of material will occur as long as the
foot pedal is pressed.
Please continue to page 8 for test procedures.
7