Electrical Tests; Test Gun Resistance - Graco PRO 244572 Instructions-Parts List Manual

Electrical Tests

Electrical Tests
Electrical components inside the gun affect performance
and safety. The following procedures test the condition
of the power supply (18) and barrel (16), and electrical
continuity between components.
CAUTION
The barrel resistor cartridge is part of the barrel and
is not replaceable. To avoid destroying the gun barrel,
do not attempt to remove the barrel resistor.
Use megohmmeter Part No. 241079 (AA) with an
applied voltage of 500 V. Connect the leads as shown.
WARNING
Fire, Explosion, and Electric Shock
Hazard
Megohmmeter Part No. 241079 (AA-see
F . 5.) is not approved for use in a hazard-
IG
ous area. To reduce the risk of sparking, do
not use the megohmmeter to check electri-
cal 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.
18

Test Gun Resistance

1. Flush and dry the fluid passage.
2. Measure resistance between the electrode needle
tip (9b) and the air swivel (35); it should be 156-180
megohms. See F . 5. If outside this range, go to
IG
the next test. If in range, refer to Electrical Trouble-
shootingon page 23 for other possible causes of
poor performance.
AA
9b
Fig. 5. Test Gun Resistance
35
TI1469A
309295L