Test Electrode Resistance - Graco OR PRO TI1681A Instructions-Parts List Manual

Electrical Tests

Test Electrode Resistance

1. Prepare the gun for service as instructed on page
41.
2. 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.
3. Measure the resistance between the conductive rod
(B) and the electrode (29). The resistance should be
20-30 megohms. See F
4. If in range, refer to Electrical Troubleshooting on
page 39 for other possible causes of poor perfor-
mance, or contact your Graco distributor.
5. Remove the electrode (29), page 43. Measure the
resistance between the contact (E) and the elec-
trode wire (F). The resistance should be 20-30
megohms. If out of range, replace the electrode.
See F . 20..
IG
6. Make sure the metal contact (C) in the barrel, the
nozzle contact ring (7a, F
contact (E) are clean and undamaged.
C
29
Fig. 19. Test Electrode Resistance
32
. 19..
IG
. 21.), and the electrode
IG
B
ti1499a
F 29
Fig. 20. Electrode
Fig. 21. Nozzle Conductive O-Ring
E
ti1548a
7a
ti1513a
309293J