User's Manual

GunSetup
Check Check
Check
Fluid Fluid
Fluid
Resistivity Resistivity
Resistivity
Toreducetheriskofre,explosion,orelectric
shock,checktheuidresistivityinanon-hazardous
areaonly.ResistanceMeter722886andProbe
722860arenotapprovedforuseinahazardous
area.
Failuretofollowthiswarningcouldcausere,
explosion,orelectricshockandresultinserious
injuryandpropertydamage.
GracoPartNo.722886ResistanceMeterand
722860Probeareavailableasaccessoriestocheck
thattheresistivityoftheuidbeingsprayedmeets
therequirementsofanelectrostaticairspraysystem.
Followtheinstructionsincludedwiththemeterand
probe.Readingsof25megohms-cmandabove
providethebestelectrostaticresults.
Ahighconductivitykitorhighconductivityhosemay
berequiredforreadingslessthan25megohm-cm.
Table Table
Table
4 4
4
. .
.
Fluid Fluid
Fluid
Resistivity Resistivity
Resistivity
Levels Levels
Levels
Megohms Megohms
Megohms
- -
-
cm cm
cm
1–77–2525–200200–2000
HighCon-
ductivity
Kitrecom-
mended
HighCon-
ductivity
Kitmaybe
needed
Bestelec-
trostatic
results
Goodelec-
trostatic
results
Check Check
Check
Fluid Fluid
Fluid
Viscosity Viscosity
Viscosity
Tocheckuidviscosityyouwillneed:
•aviscositycup
•astopwatch.
1.Completelysubmergetheviscositycupin
theuid.Liftthecupoutquickly,startingthe
stopwatchassoonasthecupiscompletely
removed.
2.Watchthestreamofuidcomingfromthebottom
ofthecup.Assoonasthereisabreakinthe
stream,shutoffthestopwatch.
3.Recordtheuidtype,elapsedtime,andsizeof
theviscositycup.
4.Iftheviscosityistoohighortoolow,contactthe
materialsupplier.Adjustasnecessary.
Flush Flush
Flush
Before Before
Before
Using Using
Using
Equipment Equipment
Equipment
Theequipmentwastestedinuidatthefactory.To
avoidcontaminatingyouruid,ushtheequipment
withacompatiblesolventbeforeusingtheequipment.
Guidelines Guidelines
Guidelines
for for
for
Abrasive Abrasive
Abrasive
Materials Materials
Materials
Whensprayingabrasivematerials,followthese
guidelines:
•OrderPartNo.24N704Electrode(blue)for
abrasivematerials.
•Sizethenozzleproperlytoreduceuidpressure
below30psi(0.21MPa,2.1bar),producingan
8–12in.(200–300mm)uidstream.
•Operatethegunwiththeuidadjustmentknobin
thefullowpositionatalltimes.Useanexternal
uidregulator,nottheuidadjustmentknob,toset
theuidpressure.
•Usetheminimumatomizingandfanairpressures
possibletoachieveagoodpattern.
•Followallproceduresunder
CleantheGunDaily,page29.
•Inspecttheelectrodedailyandreplaceifdamaged.
SeeElectrodeReplacement,page39.
26 3A2494D