Electrical Tests
The performance and safety of the spray gun are directly affected by the condition of the electrical components contained inside the gun. The electrical tests below can be used to determine the condition of the power supply (18) and the resistor stud (22) as well as the continuity of the electrical path between the components.
Use megohmmeter P/N 241079 (A) and an applied voltage of 500 volts to complete these electrical tests. Connect the leads as shown.
WARNING
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
Megohmmeter P/N 241079
8)is not approved for use in a hazard- ous area. To reduce the risk of sparking, do not use the megohmmeter to do the electrical tests unless:
DThe gun has been removed from the
hazardous area;
DOr all spraying devices in the hazardous area are turned off, ventilation fans in the hazardous area are operating, and there are no flammable vapors in the area (such as open solvent con- tainers or fumes from spraying).
Failure to follow this warning could cause fire, explosion, electric shock and result in serious injury and property damage.
Test Gun Resistance (See Fig. 8)
NOTE: The fluid passage must be flushed and dried to get an accurate reading.
Measure the resistance between the end of the elec- trode (20) and the air fitting (17). The resistance should be between 329 to 401 megohms. If the resis- tance is outside the specified range, go to the next test. If the resistance is correct, refer to Electrical Troubleshooting on page 18 for other possible causes of poor performance.
A
20
17
0371B
Fig. 8
20 308131