User's Manual

ElectricalTests
Test Test
Test
Electrode Electrode
Electrode
Resistance Resistance
Resistance
1.Followthestepsunder
PreparetheGunforService,page50.
2.Insertaconductiverod(FF)intothegunbarrel
(whichwasremovedforthepowersupplytest)
andagainstthemetalcontact(DD)inthefront
ofthebarrel.
3.Measuretheresistancebetweentheconductive
rod(FF)andtheelectrode(3).Theresistance
shouldbe10–30megohms(lessthan5megohms
forModelL60M19).
4.Ifinrange,goto
ElectricalTroubleshooting,page48,forother
possiblecausesofpoorperformance,orcontact
yourGracodistributor.
5.Removetheelectrode(3),see
ElectrodeReplacement,page54.Measurethe
resistancebetweenthecontact(HH)andthe
electrodewire(GG).Theresistanceshouldbe
10-30megohms.Ifoutofrange,replacethe
electrode.
6.Makesurethemetalcontactring(DD)in
thebarrel,thenozzlecontactring(4a),and
theelectrodecontact(HH)arecleanand
undamaged.
Figure27TestElectrodeResistance
Figure28Electrode
Figure29NozzleConductiveO-Ring
3A2496D
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