ACL450OperationManual
Rev.3/12/13MKB
ACL450IonizedEnvironment
ElectrostaticLocator
OPERATIONMANUAL
Meteriswarrantedforoneyearfromthedateofpurchaseonpartsandlabor.
Calibrationisrecommendedeverytwelvemonths.
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ACL450OperationManual
Rev.3/12/13MKB
DESCRIPTION
TheACL450IonizedEnvironmentElectrostaticLocatorisapocketsize,noncontactingstaticmeter
whichproducesconsistentlyaccuratereadingsandiseasytouse.TheACL450features:
x Pulsingbeamrangefinderforalwaysobtainingthecorrectreading
x Driftfreeaccuracyeveninionizedenvironments
x HOLDbuttontocapturetransientreadings
x Recorderoutputand40hourbatterylifeforunattendedmonitoring
x Exclusiveautozerocircuit
x Availablechargedplateadaptor(Part#ACL450CPS)
WiththeACL450,accuracyisunquestioned.WhentherangefinderLEDbeamsformanonpulsing
circle,themeterisindicatingthatyouhavepositionedtheunitatthecorrectdistance(1inch)fromthe
targetforreadingsupto20kV.Toreadhighervoltage,usethegreaterdistancesgivenin
“Specifications”section.
Forlocationswhereitishardtoreadthemeter’sdisplay,youcanfreezethedisplayednumberandthen
readit.Simplypositionthemeteratthecorrectdistancefromthetarget,pressandreleasetheHOLD
button,movetheinstrumenttoamoreconvenientposition,thenreadthedisplay.
Zeroingispushbuttonsimple,andtheACL450’schopperstabilizedcircuitryisimmunetoionizationso
accuracyisassuredinallenvironments.Forlongtermmonitoring,thefrontpaneloutputjackprovides
easyinterfacingwitharecorder,oscilloscopeorautomateddataacquisitionsystem.
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ACL450OperationManual
Rev.3/12/13MKB
OPERATION
1.ON/ZEROButton
TheON/ZERObuttonperformsthreefunctions:(1)ON,(2)ZERO,and(3)AUTOSHUTDOWNTIMER
resetinthenormaloperationmode.
ToturnunitON:PressandholdtheON/ZERObuttonfor1second,thenrelease.Thedisplay
appearsandtherangefinderLEDsbegintoflashalternately.Zeroingtheunitadjuststheoffsets
ofthemetertowithin2countstypicalor7countsmaximum.
ToZEROunit:WithunitON,pointthesensorplateawayfromanychargedobject,pressandhold
theON/ZERObuttonuntilreadingstabilizes,thenrelease.Asanalternative,pointittoward,but
donottouch,aknowngroundedsurfacesuchasthepalmofyourhand.WhileZERObuttonis
pressed,theLEDswillstopblinkingandonlytherightLEDwillremainlit(asviewedwhilereading
themeter).DuringZERO,allannunciatorsareoffincludingDP(decimalpoint).
2.Dischargetheinstrument
Grounding(discharging)yourbodyalsodischargestheinstrumentthroughitsconductivecase.Ifyou
arenotwearingagroundedwriststrap,dischargeyourbodybytouchingagroundedmetalobject
suchasawaterpipe,conduit,orworkbench.Asanalternative,placeagroundedwriststraparound
theinstrumentitself.Theshellofthefrontpaneloutputjackcanbeusedtoprovidea“hard”orsoft
groundconnection.
3.Takeareading
Forvoltageslessthan20kV,movethesensorplateoftheinstrumenttowardthetargetsurface.
Whentheinstrumentisexactlythecorrectdistance(1inch)fromthetarget,theimageprojectedby
therangefinderLEDsappearsasastationarycircle.Toreadvoltagesof20kVandhigher,usethe
distancesandmultiplyingfactorsgivenunder“Range”inSpecifications.Ifreadingsseem
inconsistent,measureusingthegroundtooutputjackconnection.
4.HOLDareading
PressandreleasetheHOLD/OFFbuttonforlessthan3seconds.Thepresentreadingisdisplayed
alongwiththeword“HOLD”.Toconservebatterylife,theLEDsturnoffwhilethereadingisheld.To
takeanothermeasurement,pressandreleasetheHOLD/OFFbuttonagain.ThisalsoresetstheAUTO
SHUTDOWNTIMER.
5.TurntheinstrumentOFF
PressandholdHOLD/OFFbuttonforlongerthan3seconds.
6. AUTOSHUTDOWNTIMER
Duringnormaloperation(notduringZERO)ablinkingdecimalpointindicatestheAUTOSHUTDOWN
TIMERisenabled.IftheAUTOSHUTDOWNTIMERisdisabled,thedecimalpointwillbeon
continuously.HoldingdowntheZERObutton,whileunitisON,forlessthan3secondsresetsthe
AUTOSHUTDOWNTIMER(ifenabled).TheAUTOSHUTDOWNTIMERisenabledordisabledby
turningontheunitandkeepingtheON/ZERObuttonpressedthentogglingtheHOLD/OFFbutton.
Theenabling/disablingoftheAUTOSHUTDOWNTIMERisindicatedbythedecimalpoint:DPon=
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ACL450OperationManual
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timeron,DPoff=timeroff.AUTOSHUTDOWNTIMERstateismaintainedduringpowerOFF.AUTO
SHUTDOWNTIMERcanbecontinuallytoggledaslongastheON/ZERObuttonremainspressed,upto
20seconds,afterwhichtheunitwillturnoff.AblinkingdecimalpointindicatestheAUTO
SHUTDOWNTIMERisactive.DuringthelastminutebeforepoweroffALLannunciatorswillblinkata
fastrate.Pressinganybuttonwillresetthetimer.Timeoutisnominally15minutes.
7.VersionDisplay
WithunitOFF,pressandholdtheHOLD/OFFbuttonthenpresstheON/ZERObuttonandreleasethe
HOLD/OFFbutton,theunitwillblinktheversionnumber.ForVERSION1.02therightlightLEDwill
blinkthefirstdigit(1).TheleftLEDwillblinkonceindicatingtheendofthefirstdigit.TherightLED
willthenblinktwiceindicatingthethirddigit(2).ReleasingtheON/ZEROnumberallowstheunitto
returntonormaloperation.Ifthedigitiszerotenblinkswillbeoutput.
CAUTION:
Ifyoubringtheinstrument(oranygroundedobject)tooclosetoachargedsurface,anelectricalarcmay
occur.Toavoidthisandtakereadingssafely,checkthevoltage/distancerangesgiveninSpecifications.
Alwaysbringtheinstrumenttowardatargetsurfacefromadistanceofseveralinches.Asthedistance
closes,watchthedisplaytobesurethattheproperdistanceismaintainedforeachvoltagerange.
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ACL450OperationManual
Rev.3/12/13MKB
MAINTENANCE
Replacingthebattery
Thebatteryshouldbereplacedannually,wheneveryouplananextendedperiodofunattended
monitoring,orwhenever“BAT”appearsinthedisplayformorethananinstant.LowBATissetfor6.9±
0.6volts.Removethebatterybeforelongtermstorage.SeeSpecificationsforreplacementtype.If
unitfailstooperateafterreplacingthebattery,removebattery,pressandreleasetheON/ZERObutton,
thenreconnectthebattery.
Cleaning
Toobtainaccurate,driftfreereadings,thesensorplateandespeciallytheareaaroundtheaperture
mustbekeptabsolutelycleanatalltimes.Besuretoalwayskeeptheinstrumentinitsprotectivecase
whennotactuallytakingmeasurements.Nevertouchtheaperturewithanything–notevencotton
swabs.Toremovedustorotherparticulatematteruselowpressureinstrumentgradeair.Toremove
severecontaminationsprayorflushwiththesmallestpracticalamountsofcleantechnicalgrade
isopropylalcohol.Thenstandtheinstrumentonendandallowittodryforseveralhours.DONOT
cleanwithanysolventonaregularbasis.
ZeroDrift
Applyantistatsolutiontoplasticsurroundingthesensorplateusingalintfreeapplicator.DONOT
allowentryintoaperture.2001/2003GeneralPurposeStaticide®and8044Staticide®LintFreeWipes
arerecommendedforthisapplication.
CALIBRATION
TheACL450IonizedEnvironmentElectrostaticLocatorisfactorycalibratedpriortoshipment.
Recalibrationshouldbeperformedannually,ormorefrequentlyifspecifiedbycontractorcompany
policy.Yourinstrumentshouldalsoberecalibratedanytimeithasbeenrepairedortamperedwith.
ACLwillrecalibrateyourinstrumentatareasonablecostorprovideinformationandprocedureson
calibrationuponrequest.WealsooffercalibrationserviceswithtraceabilitytoNISTorMILSTD
45662A.
SAFETYCONSIDERATIONS
TheACL450hasundergonetestingtoqualifyforthefollowingmarkings:
CE RadiatedandESDimmunitytoseveritylevelsforindustrialdevicesaccordingtoEN500821and
radiatedemissionswithlimitsforGroup1,ClassAproductofEN55011tothegenericstandardEN
500812(1992).
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ACL450OperationManual
Rev.3/12/13MKB
SPECIFICATIONS
Display:
Ranges:
Accuracy:
AnalogOutput:
JackType:
Amplitude:
Impedance:
ResponseTime:
BatteryType: BatteryLife: Dimensions: Weight:
OperatingEnvironment:
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3½digitLCD,autopolarityreadout,HOLDandLOWBATTindicators
0to±19.99kVat1inch.
Voltagesof20kVandhighermaybereadbyincreasingthedistanceto
thetarget:
Multiply
kV
Distance
ReadingsBy
040
060
080
4.0inches
6.5inches
8.5inches
2
3
4
±5%ofreading,+zerooffset,+2lsd
Acceptsstandard3/32inch(2.5mm)monauralphoneplug
1Vsignaldenotes10kVreadingat1inchforhighimpedanceloads
10kLoad>1megfor<1%error.SleeveGNDtip1/10,000
Typ.80–100msec10–90%
9voltNEDA#1604orequivalent
40hoursofnormaluse,withalkalinebattery
2.4x4.2x0.9inches(6.1x10.7x2.3cm)
5oz.(0.14kg)withbattery
0°50°C(32°122°F),o85%RH(noncondensing)unaffectedby
ionizingequipment
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ACL450OperationManual
Rev.3/12/13MKB
ACCESSORIES
ACL450CPS
ACL450CPSisanaddonfortheACL450IonizedEnvironmentElectrostaticLocator.Thissystem
permitsthefieldmetertobeusedtotestandmonitortheeffectivenessandbalanceofairionization
devices.TheACL450CPSisdesignedtomeetESDAssociationStandardSP3.32000.
TheACL450CPSincludesachargerandanadapterplatefortheACL450fieldmeter.TheACL450
IonizedEnvironmentElectrostaticLocator(soldseparately)isanaccurateandportablefieldmeterfor
detectingandmeasuringstaticpotentials.PerformanceoftheACL450meterismoreaccuratethan
otherfieldmetersthatarenotchopperstabilized.
TheHOLDfeatureallowsbalancemeasurementstobetakeninareasinaccessiblewithstandard
chargedplatemonitors.ConvergentLEDbeamsprovideeasypositioningofthemeter.Theanalog
outputprovides1voltoutputcorrespondingtoa10kVreadingonthedisplay.Completespecifications
arepresentedlaterinhismanual.
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ACL450OperationManual
Rev.3/12/13MKB
OPERATION
INSTALLATIONOFTHEADAPTERPLATE
ThecaseoftheModel450fieldmeterhastwoslotsalongitssides.TheTOPslotistheoneclosesttothe
instrumentfront.SlidethetabsoftheadapterplategroundplateintotheTOPslotsofthemetercaseas
farastheywillgo.
MODEL450FIELDMETER
Refertopage2inthismanualforoperatinginstructions.
CHARGER
Thisunitisturnedonbydepressingthemomentarypushbutton.Therecommendedmethodofuseis
to:
1.Touchthedesiredpolarityterminaltothefloatingplate.
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ACL450OperationManual
Rev.3/12/13MKB
2.Touchtheoppositepolarityterminalwithyourfingerwhilewearingagroundedwriststrap.(The
user’sbodyprovidesthegroundpathforboththe450CPSchargerandthe450fieldmeter.)
3.Depressthepushbuttonpowerswitchonthecharger.Platevoltageshouldindicateover1000V.
4.Removetheconnectionofthe450CPSchargerfromtheplatewhilekeepingthepowerpushbutton
depressed.
5.Begintimingthemomentcontactisbrokenwiththeplate.
Polarityselection
Theterminalsarelabeled(+)and().ToprovideaPOSITIVEvoltageoutput,connectthenegative()
terminaltogroundwhilepressingandholdingthepowerbutton.ToprovideaNEGATIVEvoltage
output,connectthepositive(+)terminaltogroundwhilepressingandholdingthepowerbutton.
IMPORTANT:Agroundpathmustbeprovidedbetweenoneoftheoutputterminalsofthechargerand
thegroundreferenceofthe450fieldmeterandadapterplate.Thisisnormallyprovidedbyholdingthe
chargerinonehandandthe450withadapterplateintheother.Ifthisisnotpossible,useatestleadto
connectoneofthechargeroutputterminalstothe450groundconnection(outputjack.)
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ACL450OperationManual
Rev.3/12/13MKB
CALIBRATION
ACLinstrumentsarefactorycalibratedpriortoshipment.Calibrationshouldbeperformedannually,or
morefrequentlyifspecifiedbycontractorcompanypolicy.Theinstrumentshouldalsoberecalibrated
anytimeithasbeenrepairedortamperedwith.ACL,Inc.willprovideservicetorecalibratethe
instrumentsatareasonablecostorprovideinformationandproceduresregardingcalibrationupon
request.OurcalibrationservicesoffertraceabilitytoNISTorMILSTD45662A.
SPECIFICATIONS450CPS
AdapterPlateAssembly
PlateCapacitance:
12 pF +/-2 pF
Range:
0to±2kV
Grounding:
ConnectionismadethroughconductivematerialofACL450case
Dimensions: 2.4”Lx4.2:Wx0.9”D(6.1x10.7x2.3cm)
Weight:
1.5oz(42.5gm)
Charger
Output:
1100VDCnominal,<1Amax.
OutputTerminals:
Twoacornbuttonslabeled(+)and().Toselect,groundoppositeterminal.
LoadRegulation:
Betterthan8%NLtoFLwhereFL=109
TemperatureRange: +100to+300C(+500to860F)
RelativeHumidity:
10%to80%noncondensing
BatteryType: 9voltNEDA#1604orequivalent
BatteryLife: 40hoursofnormaluse,withalkalinebattery
Dimensions: 3.75”Lx2.88”Wx1”D(9.5x7.3x2.5cm)
Weight:
2.8oz(79gm)
BATTERYCARE
Boththe450testerandthechargerusea9Valkalinebatteryforoperation.Batteriesshouldbereplacedwhen
“BAT”isindicatedontheACL450meter(7.5volts.)Thebatteryinthechargershouldbereplacedwhen
youcannolongerchargeover1000volts.
CLEANING
Itisimportanttokeeptheinsulatorsontheadaptercleanandfreeofcontaminantsthatmaycausesurface
leakage.Totesttheperformanceoftheadapterplate,chargetheplateandnotethatdischargerateinanon
ionizedarea.Theselfdischargerateto10%oforiginalvoltageshouldnotbelessthanfiveminutes.
Theareaaroundtheapertureofthe450testermustbekeptcleantoensureaccurate,driftfreereadings.
Nevertouchtheaperturewithanything.Toremovedustorotherparticulatematter,uselowpressureinstrument
gradeair.Toremovemoreseverecontamination,sprayorflushwiththesmallestpracticalamountofclean
technicalgradeisopropylalcohol.Aftercleaningwithalcohol,allowtheinstrumenttodryforseveralhoursbefore
use.
WARRANTY
ACL,Inc.warrantstotheowners,eachinstrumentandsubassemblymanufacturedbythemtobefreefrom
defectsinmaterialandworkmanshipforaperiodofoneyearaftershipmentfromfactory.Thiswarrantyis
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ACL450OperationManual
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applicabletotheoriginalpurchaseronly.Liabilityunderthiswarrantyislimitedtoservice,adjustmentor
replacementofdefectiveparts(otherthanfusesorbatteries)onanyinstrumentorsubassemblyreturnedtothe
factoryforthispurpose,transportationchargesprepaid.Thiswarrantydoesnotapplytoinstrumentsorsub
assembliessubjectedtoabuse,abnormaloperatingconditions,orunauthorizedrepairormodification.SinceACL,
Inc.hasnocontroloverconditionsofuse;nowarrantyismade,orimpliedastothesuitabilityofourproductfor
thecustomer'sintendeduse.
RETURNPOLICYTOFACTORY
MaterialsreturnedtoACLmusthaveaReturnMaterialAuthorizationnumber.ToobtainaRMA
number,contactourmeterdepartmentat8479819212.Customershave30daystodeterminethattheproduct
orderedfillstheirneedandperformsasdescribedinACLliterature.Unitsreturnedforapprovedrepairorcredit
mustbeintheoriginalpackagingincludingallpartsandpaperworkplusbeinverygoodphysicalcondition.Ifnot,
thecustomerisbilledthecosttorefurbishtheunitandformissingaccessoriesandmerchandise.Noproductsmay
bereturnedforexchangeorcreditafter12monthsoftheshipmentdate.ACL,Inc.reservestherighttorepair
orreplaceunitsunderwarranty.
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