Gun Setup
Check Gun Electrical Grounding
Megohmmeter Part No. 241079
16)is not approved for use in a hazardous area. To reduce the risk of sparking, do not use the megohmmeter to check electrical grounding unless:
•The gun has been removed from the hazardous area;
•Or 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 containers or fumes from spraying).
Failure to follow this warning could cause fire, explosion, and electric shock and result in serious injury and property damage.
Graco Part No. 241079 Megohmmeter is available as an accessory to check that the gun is properly grounded.
1.Have a qualified electrician check the electrical grounding continuity of the spray gun and air hose.
2.Turn OFF (O) the ES
3.Turn off the air and fluid supply to the gun. Follow the Pressure Relief Procedure, page 27.
4.Disconnect the fluid hose.
5.Make sure the grounded air hose is connected and the hose ground wire is connected to a true earth ground.
6.Measure the resistance between the gun handle (BB) and a true earth ground (CC). Use an applied voltage of 500 minimum to 1000 volts maximum. The resistance should not exceed 1 megohm. See Fig. 16.
7.If the resistance is greater than 1 megohm, check the tightness of the ground connections and be sure the air hose ground wire is connected to a true earth ground. If the resistance is still too high, replace the air hose.
Figure 16 Check Gun Electrical Grounding
3A2495C | 25 |