Adjust The Electrostatics - Graco PRO Xs Instructions - Parts Manual

5. Use the air pressure regulator on the fan air supply
line (A2) to adjust the pattern size.
• For the most efficiency, always use the lowest air
pressure possible.
• When increasing to a wide, flat pattern, it may be
necessary to increase the supply of fluid to the gun
to maintain the same amount of coverage over a
large area.
• See Spray Pattern Troubleshooting on page 25 to
correct spray pattern problems.
KV2
TA
CYL
A1
F . 13. Manifold Air Connections
IG
313227E
KV1
A2
TI1577A

Adjust the Electrostatics

1. Shut off the fluid supply.
2. Trigger the gun, then turn on the turbine air (TA).
See F . 13.
IG
3. Refer to Table 3 to set the proper pressure at the
turbine air hose inlet when air is flowing.
NOTICE
Do not exceed these pressures as there is no
added benefit and turbine life could be reduced.
Table 3: Dynamic Turbine Air Pressures
Turbine Air Air pressure at turbine air hose
Hose Length
ft (m)
15 (4.6)
25 (7.6)
36 (11)
50 (15.3)
75 (22.9)
100 (30.5)
4. Check the voltage output of the gun using a high
voltage probe and meter or by reading the ES (kV)
Display Module.
The gun's normal spraying voltage reading is 30-40
kV. If a ball end high voltage measurement probe is
used, the gun voltage will rise to about 60 kV. This
will happen with all resistive electrostatic guns.
See Electrical Troubleshooting on page 27 to cor-
rect voltage problems.
Operation
inlet for full voltage
psi (bar, MPa)
54 (3.8, 0.38)
55 (3.85, 0.38)
56 (3.9, 0.39)
57 (4.0, 0.40)
59 (4.1, 0.41)
61 (4.3, 0.43)
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