Graco Optimiser 2K 02748 Instructions Manual page 13

NOTE: You cannot sample the adhesive and activator
at the same time. The adhesive must be checked with
the atomizing air off, while the activator must be
checked with the atomizing air on.
1. Check the ratio of the adhesive.
A. Weigh an empty beaker.
B. Close the atomizing air shut-off valve.
C. Close the activator shut-off valve.
D. Trigger the gun into the beaker for 15 seconds
to dispense the adhesive.
E. Follow the Pressure Relief Procedure on
page 7.
F. Weigh the adhesive, subtract the weight of the
beaker, then multiply the figure by 4 to obtain
the weight per minute of the adhesive.
2. Check the ratio of the activator.
A. Weigh an empty beaker.
B. Cover the beaker with a loose cover to deflect
any over-spray. See Fig. 21.
C. Disconnect the red tube from the activator
valve.
D. Connect the ratio check tube (54) (supplied
with the gun) to the activator valve outlet fitting
1
(52 ) as shown in Fig. 21. Turn the front fitting
2)
(52 toward the front of the gun.
E. Close the adhesive shut-off valve.
F. Open the atomizing air shut-off valve.
G. Open the activator shut-off valve.
Ratio Check
Fig. 21
H. Place the ratio check tube (54) into the beaker
I.
J. Follow the Pressure Relief Procedure on
K. Remove the beaker cover. Weigh the activator
3. Adjust the ratio as needed.
Adjust the activator supply pressure to change the
ratio of adhesive to activator, then check the ratio
again.
Once the ratio is set, do not change the adhesive
or activator supply pressure settings or turn the
gun fluid adjustment knob. Any change to the flow
of either fluid will change the mix ratio.
1 2
52 52
as shown in Fig. 21.
Direct the spray gun into the booth. Trigger the
gun for 1 minute to dispense the activator
through the tube and into the beaker.
page 7.
and subtract the weight of the beaker to obtain
the weight per minute of the activator.
54
02786A