User's Manual

ElectricalTests
Electrical Electrical
Electrical
Tests Tests
Tests
Usethefollowingprocedurestotestthecondition
ofthepowersupplyandgunbody,andelectrical
continuitybetweencomponents.
UsemegohmmeterPartNo.241079(AA)andan
appliedvoltageof500V.Connecttheleadsas
shown.
MegohmmeterPartNo.241079(AA-seeFig.
17)isnotapprovedforuseinahazardousarea.
Toreducetheriskofsparking,donotusethe
megohmmetertocheckelectricalgrounding
unless:
•Thegunhasbeenremovedfromthehazardous
area;
•Orallsprayingdevicesinthehazardousarea
areturnedoff,ventilationfansinthehazardous
areaareoperating,andtherearenoammable
vaporsinthearea(suchasopensolvent
containersorfumesfromspraying).
Failuretofollowthiswarningcouldcausere,
explosion,andelectricshockandresultinserious
injuryandpropertydamage.
Test Test
Test
Gun Gun
Gun
Resistance Resistance
Resistance
1.Flushanddrytheuidpassage.
2.For For
For
Model Model
Model
L40T14 L40T14
L40T14
and and
and
L40T15 L40T15
L40T15
guns guns
guns
only: only:
only:
Test
thebarrelcontinuitytoverifythatthemetalpin
inthebarrelisproperlygrounded.Measure
resistancebetweenthemetalpin(GP)andthe
airswivel(21).Theresistanceshouldbeless
than100ohms.Iftheresistanceis100ohmsor
more,replacethegunbody.
3.For For
For
all all
all
guns: guns:
guns:
Triggerthegunandmeasure
resistancebetweentheelectrodeneedletip(3)
andtheairswivel(21).Theresistanceshouldbe:
•75–120megohmsfor40kVguns
•104–148megohmsfor60kVguns
•148–193megohmsfor85kVguns
Ifoutsidethisrange,testthegun
untriggered.Ifstilloutsidethisrange,goto
TestPowerSupplyResistance,page32.Ifinrange,
seeElectricalTroubleshooting,page35forother
possiblecausesofpoorperformance.
Figure17TestGunResistance
3A2494D 31