User's Manual

ElectricalTests
Electrical Electrical
Electrical
Tests Tests
Tests
Usethefollowingprocedurestotestthecondition
ofthepowersupplyandgunbody,andelectrical
continuitybetweencomponents.
PowerSupplyRemovalandReplacement,page59.
UsemegohmmeterPartNo.241079(AA)andan
appliedvoltageof500V.Connecttheleadsas
shown.
MegohmmeterPartNo.241079(AA-seeFig.
25)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.Followthestepsunder
PreparetheGunforService,page50.
2.Triggerthegunandmeasureresistance
betweentheelectrodeneedletip(3)andthe
airswivel(21).Theresistanceshouldbe
104–150megohms(90–120megohmsfor
ModelL60M19).Ifoutsidethisrange,goto
TestPowerSupplyResistance,page40.
Ifinrange,see
VoltageLossTroubleshooting,page43forother
possiblecausesofpoorperformance,orcontact
yourGracodistributor.
Figure25TestGunResistance
3A2496D 39