Electrical
Electrical
Electrical Tests
Tests
Tests
Electrical components inside the gun affect
performance and safety. Use the following
procedures to test the condition of the power supply
and gun body, and electrical continuity between
components.
NOTICE
NOTICE
NOTICE
The gun body resistor cartridge is part of the body
and is not replaceable. To avoid destroying the gun
body, do not attempt to remove the body resistor.
Use megohmmeter Part No. 241079 (AA) with an
applied voltage of 500 V. Connect the leads as
shown.
Megohmmeter Part No. 241079 (AA-see Fig. 17)
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.
Test
Test
Test Gun
Gun
Gun Resistance
Resistance
Resistance
1.
Flush and dry the fluid passage.
2.
Measure resistance between the electrode
needle tip (25a) and the air swivel (21). The
resistance should be:
• 106–150 megohms for 60 kV guns
• 150–195 megohms for 85 kV guns
If outside this range, go to
Test Power Supply Resistance, page 33
. If in
range, see
Electrical Troubleshooting, page 37
for
other possible causes of poor performance.
Figure 17 Test Gun Resistance
32
3A2495K