Graco Inc. 244592 - Manual (Page 21)

Operation
309298J 21
Adjust the Electrostatics
1. Shut off the fluid supply.
1. Trigger the gun, then turn on the turbine air (TA).
See F
IG . 12..
2. Refer to Table 2 to set the proper pressure at the
turbine air hose inlet when air is flowing. Do not
exceed these pressures as there is no added bene-
fit and turbine life could be reduced.
3. 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 high voltage reading is 60-70 kV. If a
ball end high voltage measurement probe is used, the
gun voltage will rise to about 85 kV. This will happen
with all resistive electrostatic guns.
See Electrical Troubleshooting on page 34 to correct
voltage problems.
Table 2: Dynamic Turbine Air Pressures
Turbine Air
Hose Length
ft (m)
Air pressure at turbine air hose
inlet for full voltage
psi (bar, MPa)
15 (4.6) 54 (3.8, 0.38)
25 (7.6) 55 (3.85, 0.38)
36 (11) 56 (3.9, 0.39)
50 (15.3) 57 (4.0, 0.40)
75 (22.9) 59 (4.1, 0.41)
100 (30.5) 61 (4.3, 0.43)