Test Electrode Resistance - Graco PRO Auto Xs Series Instructions-Parts List Manual

Electrical Tests

Test Electrode Resistance

1. Insert a conductive rod (B) into the gun barrel
(removed for the power supply test) and against the
metal contact (C) in the front of the barrel.
2. Measure the resistance between the conductive rod
(B) and the electrode (7). The resistance should be
20-30 megohms. See F
3. If in range, refer to Electrical Troubleshooting on
page 31 for other possible causes of poor perfor-
mance, or contact your Graco distributor.
4. Remove the electrode (7), page 35. Measure the
resistance between the contact (E) and the elec-
trode wire (F). The resistance should be 20-30 meg-
ohms. If out of range, replace the electrode. See
F 18.
IGURE
5. Make sure the metal contact (C) in the barrel, the
nozzle contact ring (4a, F
trode contacts (E) are clean and undamaged.
C
7
Fig. 17. Test Electrode Resistance
28
17.
IGURE
19), and the elec-
IGURE
B
ti1499a
F 7
Fig. 18. Electrode
Fig. 19. Nozzle Conductive O-Ring
E
ti1548a
4a
ti1513a
309297K