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308-34113
Ratio
Check
NOTE:
Y
ou cannot sample the adhesive and activator
at the same time. The adhesive must be checked with
the atomizing air of
f, 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-of
f valve.
C.
Close the activator shut-of
f valve.
D. T
rigger the gun into the beaker for 15 seconds
to dispense the adhesive.
E.
Follow the
Pressure Relief Procedure
on
page 7.
F. W
eigh 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
(52
1
) as shown in Fig. 21. T
urn the front fitting
(52
2)
toward
the front of the gun.
E.
Close the adhesive shut-of
f valve.
F.
Open the atomizing air shut-of
f valve.
G.
Open the activator shut-of
f valve.
Fig. 21
02786A
54
52
2
52
1
H.
Place the ratio check tube (54) into the beaker
as shown in Fig. 21.
I.
Direct the spray gun into the booth. T
rigger the
gun for 1 minute to dispense the activator
through the tube and into the beaker
.
J.
Follow the
Pressure Relief Procedure
on
page 7.
K.
Remove the beaker cover
. W
eigh the activator
and subtract the weight of the beaker to obtain
the weight per minute of 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.