Test Power Supply Resistance; Test Electrode Resistance - Graco Pro Xp 3A2494D Instructions Manual

Electrical Tests
Test Power Power Supply Supply Resistance
Test Test Power Supply
1. Remove the power supply (11). See
Supply Removal and Replacement, page
2. Remove the alternator (15)
from the power supply. See
Alternator Removal and Replacement, page
3. Measure resistance from the power supply's
ground strips (EE) to the spring (11a). The
resistance should be:
• 60–85 megohms for 40kV guns
• 86–110 megohms for 60kV guns
• 130–160 megohms for 85kV guns
4. If outside this range, replace the
power supply. If in range, go to
Test Electrode Resistance, page
5. If you still have problems, refer to
Electrical Troubleshooting, page 35
other possible causes of poor performance, or
contact your Graco distributor.
6. Be sure the spring (11a) is in place before
reinstalling the power supply.
Figure 18 Test Power Supply Resistance
32
Resistance
Resistance
Power
43.
44.
32.
for
Test Electrode Electrode Resistance Resistance
Test Test Electrode Resistance
Remove the electrode (3). See
Electrode Replacement, page
the resistance between the contact (HH) and the
electrode wire (GG). The resistance should be 8-30
megohms. If out of range, replace the electrode.
NOTE: If the gun resistance is still out of range after NOTE: NOTE:
testing the power supply and electrode:
• Check that the conductive o-ring (4a) is making
contact with the barrel pin.
• Check that the power supply spring (11a) is making
contact with the barrel pin.
Figure 19 Test Electrode Resistance
39. Measure
3A2494D