Check
Check
Check Gun
Gun
Gun Electrical
Electrical
Electrical Grounding
Grounding
Grounding
Megohmmeter Part No. 241079 (AA-see Fig. 16)
is not approved for use in a hazardous location.
To reduce the risk of sparking, do not use the
megohmmeter to check electrical grounding
unless:
• The gun has been removed from the hazardous
location;
• Or all spraying devices in the hazardous
location are turned off, ventilation fans in the
hazardous location 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 On-Off switch.
3.
Turn off the air and fluid supply to the gun. Follow
the
Pressure Relief Procedure, page 26
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
24
3A2495K
