Tesoro Inca Assembly instructions

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IncaOPERATORINSTRUCTIONMANUAL
CONGRATULATIONS!
YournewTESOROMetalDetectorwasdesignedtoprovideyouwithmanyhappyhoursofenjoymentinthemost
rewardinghobbyIcanthinkof–treasurehunting.Aheadofyouliefascinatingandexcitingexperiencesasyoustepintothe
past–uncoveringartifactslostbypastgenerations.Iwishwecouldsharetheseexperienceswithyou,andwewishyouthe
bestofsuccess.
YourTESOROMetalDetectoriscapableofmeetingyourneedsinanyconceivabletreasurehuntingsituation.Aswith
anydetector,operatingskillandfamiliaritywiththisinstrumentareprobablythelimitingfactorsindetermininghowsuccessful
youwillbe.Werecommendthatyoureadthismanualandunderstandfullybeforeattemptingtousetheinstrumentinthe
field.Asyoubecomemorefamiliarwithyourdetectorthroughpractice,yourrateofsuccesswillincreasedramatically.
TheTESOROMetalDetectorisaprecisionelectronicinstrument,whichwilllastforyearsifproperlycaredfor.Treatit
rightanditwon'tletyoudown.
GoodHunting!JackGifford
GENERALDESCRIPTION
TheAztecisaTransmitterreceiver(TR)MetalDetector,operatingintheverylowfrequency(VLF)portionoftheRF
spectrum.Thedetectorutilizesthenaturalphenomenaofthephasedelayofalltargetstoprovidemineralfreeorground
compensatedresponseinthenormalmodeofoperation,ortoprovidediscriminatecapabilityinthediscriminatemode.
TheAztecisanextremelysensitivemetaldetector,butbecauseofitsuniquepushbuttonMODECHANGE/TUNING
SWITCHistheeasiest"onehanded"VLF/TRDiscriminatortouse.
Aswithanydetector,thefamiliarityoftheuserwiththeinstrumentwillhaveagreatdealtodowithhowsuccessfulthe
treasurehunteris.Werecommendthatyoureadandunderstandthismanualfullybeforeattemptingtousetheinstrumentin
thefield.
Besuretofilloutandmailyourwarrantyregistrationcardtovalidateyourwarranty.
ASSEMBLY
AssemblyoftheIncaisverysimple,andrequiresnospecialtools.Theonlyassemblyrequiredistomountthesearchcoil
totheendofthelowerstemandtoinstallthelowerstemandlocknutassemblytotheupperstem.
1. Depressthetwobuttonsontheupperendofthelowerstem,andslideitintotheupperstem.Pushthelowerstem
upsothatthebuttonsclickintothethirdsetofholesfromtheendoftheupperstem.
2. Insertthepoletipbetweenthemountingearsofthesearchcoil,afterremovingthescrewandthumbnut.Alignthe
holesinthepoletipandthoseinthemountingears.
3. Insertthecoilmountingscrewthroughthecoilandpoletip.Thescrewheadshouldbeonthesideofthesearchcoil
wherethecablecomesout.
4. Installthethumbnutonthescrewandtightenbyhand.
5. Windthesearchcoilcablearoundthepolebydepressingthespringbuttonsandturningthelowerstemaround
severaltimesasnecessary.
ADJUSTMENT
Thesearchcoilangleandstemlengthshouldbeadjustedsothattheunitisnotuncomfortableortiringafterlongperiods
ofuse.Thestemlengthisadjustedbydepressingthespringbuttonsandextendingorshorteningthepoletilltheyclickinto
theholesthatgiveyouthemostcomfortablesetting.Thecoilshouldbeaboutoneinchabovethegroundwhilestandingerect.
Adjusttheangleofthesearchcoil,sothatthecoilisparalleltotheground.Tightenthesearchcoilthumbnutbyhandto
maintainthissetting.
Thearmrestontherearofthehandlecanbemovedforwardbyremovingthescrewsandnuts,andreinstallingthe
assemblyintothemostforwardsetofholes.
SPECIFICATIONS
CONTROLS
ThefunctionofthefrontpanelcontrolstheIncaareasfollows.
1. ON/OFF,TUNING,BATTERYTEST.Thiscontrolisusedtotunethedetectortoit'smostsensitivelevel(Threshold)
regardlessofwhichmodeofoperationisbeingused.Italsocontrolsthepowerforthedetector,andactivatesthe
automaticbatterytestcircuitry.TheMODEcontrolshouldalwaysbeintheNORMALONLYpositionandthe
MODE/TUNINGswitchdepressedwhensettingtheunittothresholdwiththeTUNINGcontrol,orwhencheckingthe
batteries.Thebatteriesshouldbetestedafterabout10minutesofoperation,andwithamoderatetoheavyamountof
sound.Turnthedetectoroffmomentarily,andthenbackon,turningtheTUNINGcontrolcompletelyclockwisetomake
maximumsound.Thedetectorwillremaininthebatterytestmodeforabout3to5seconds.Ameterreadingof.6or
aboveindicatesthebatterystrengthisadequateforproperoperation.Ifthemeterreadingisbelow.6,replacethe
batteries.Thenaftercheckingthebatteries,retunetothresholdbeforereleasingtheMODE/CHANGETUNINGSWITCH
andturningtheMODEcontrolswitchtothedesiredmodeofoperation.
2. GROUNDADJUST.Thecontrolisusedtoadjustthedetectorsothatitdoesn'trespondtothemineralizationinthe
groundwhenusedintheNORMAL(allmetal)mode.TheGROUNDADJUSTiseasiertosetwhentheMODEswitchisin
theNORMALONLYposition,sincethethresholdwillremainwhentheMODECHANGE/TUNINGSWITCHisdepressed
inthisposition.
3. DISCRIMINATELEVEL.Thiscontrolisusedtoadjustthedetector'sresponsetounwantedmetallictrashwhenused
intheDiscriminatemode.Atthelowestsetting"0",thedetectorwilleliminatemostironobjects,butwillstillrespondina
positivemannertolightfoil,bottlecaps,pulltabsandmostothermetallicitems.Astheknobsettingisincreased,
responsetomoreofthesemetallictrashitemsisreversedsothattheseobjectsgivenoresponse.
4. DISCRIMINATESENSITIVITY.SincetheIncaisamineralfreediscriminator,thiscontrolwillusuallybesetatthe
maximum.Therearesituations,however,wherereducingthesensitivitywillyieldbetterperformance.Thesesituations
willusuallybeselfevidentduetospuriousnoise"signals"causedbyveryheavymetallictrashconcentrations,minerals,
orRForpowerlineinterference.Setthiscontrolashighaswillallowyoutooperatewithatolerablelevelofinterference.
5. MODESWITCH.Thisswitchisathreepositionrotarycontrolwhichselectsthedetector'sbasicoperatingmode.In
theNORMALONLYmode,thepushbuttonMODECHANGE/TUNINGswitchactsasaTUNINGswitchonly,andno
modechangeisaccomplishedwhenthepushbuttonisdepressed.IntheNORMALorDISCRIMmodes,depressingand
holdingthepushbuttoncausesachangetotheothermode.Whenthepushbuttonisreleased,thedetectorreturnsto
themodeselectedbytheMODESWITCHtohelpyourememberwhichcontrolsareoperationalineachofthetwobasic
modes.
6. TUNING/MODECHANGESWITCH.Thispushbuttonswitchislocatedintheendofthehandle,whereitcanbe
operatedwiththethumbofthehandholdingthedetector.Thisswitchperformstwofunctions.
A. Whendepressedmomentarilyandreleased,itretunesthedetectorbacktothedesiredthreshold,wheninNORMALONLYmode. 
B. Whenheldinthedepressedposition,itcausesthedetectortoswitchtotheotherbasicmode.IftheMODEswitchisintheNormal
position,holdingthebuttondownwillcausethedetectortoswitchtoDiscriminateMode.IftheMODEswitchisintheDiscriminateposition,
holdingthebuttondownwillcausethedetectortoswitchtoNormalmode.Whenthebuttonisreleased,thedetectorreturnstothemode
selectedbytheModeswitch.
7. METER.Themeterandit'sassociatedcircuitry,whilenotreallyacontrol,servestwoimportantfunctions.
A. BATTERYTEST.Thisfunctionisautomaticallyperformedforabout4secondseachtimethedetectorpoweristurnedon.Themeter
readingwillbeabovethe.6markontheintensityscalewhentheunitismakingaloudnoiseifthebatterystrengthisadequateforproper
performance.
B. COINDEPTH.IntheNORMALposition,themeterwillindicateapproximatedepthofthedetectedtarget,assumingthetargettobecoin
size.IntheDISCRIMmode,thedepthreadingfeaturewillbeinoperable.
ThecoindepthreadingfeatureoftheIncaisanextremelyusefulaidinpinpointing.Thereadingwillreachit'smaximumforwarddeflection
onthemeterneedlewhenthesearchcoilisdirectlyoverthetarget,andthemeterreadingwillthenindicatetheapproximatetargetdepth.
TUNING
Nodetector,regardlessofhowpowerfulitis,canprovideoptimumdepthifitisimproperlytuned.Infact,themore
powerfuladetectoris,themorecriticalthetuningbecomes.Lesspowerfulunitsaremoretolerantofoperatormisadjustment,
butarenotcapableofthedepthofaproperlytunedhighpowerdetectorsuchastheInca.
ToachievemaximumperformancefromyourIncabesuretoproperlyadjusttheGROUNDADJUSTandTUNINGcontrols
intheNormalModeonly.Thesettingsofthesecontrolswillalsoaffectthedetector'sperformanceintheDiscrimmode,sobe
suretoadjustthemproperly,evenifyouonlyplantooperatethedetectorintheDiscrimmode.
FollowingthetuningproceduresoutlinedbelowwillhelpyouproperlytuneyourInca,andwillallowyoutofullyutilizeits
performancecapabilities.
A.NORMALMODETUNING.NormalModeTuning.
1. SettheModeSwitchtotheNormalOnlyposition.
2. Depressthehandlemountedpushbuttonswitch,andturntheOn/OffTuningcontrolcompletelyclockwise.Checkto
seethatthebatteryreadingisabove.6.
3. Afterthebatterytestperiodahselapsed,turntheTuningcontroldownsothedetectorismakingjustamoderate
buzz.BesuretokeepthepushbuttondepressedwhilesettingtheTuningcontrol.
4. Holdthesearchcoilabouttwofeetabovetheground,andreleasethepushbutton.
5. Lowerthesearchcoiltoaboutoneortwoinchesabovetheground,andnoticeanychangesintheaudiosoundas
thisisdone.
6. Iftheaudiosoundlevelincreased,turntheGroundAdjustcontrolslightlylower.NotethatturningtheGroundAdjust
controlwillcauseachangeintheaudiolevel.Ignorethischange,asitisofnoconsequence.Theonlychangeofconcern
isthatchangewhichoccursasthesearchcoilisloweredtotheground.
7. Raisethesearchcoiltoabouttwofeetabovetheground,andmomentarilydepressthepushbuttontoretunethe
detectortothemoderatebuzz.
8. Repeatsteps5,6,and7,untilthereisalmostnochangeintheaudiolevelasthesearchcoilisloweredtothe
ground.NOTE:thegroundmustbefreeofallmetallicitemswherethecoilislowered.Ifyoucannotadjustthedetectorto
dothis,youmaybeoverapieceofmetal.Movetoanotherspotandtryagain.
9. Momentarilydepressthetuningswitch,andturntheTUNINGcontroldowntogetjustafaintaudiobuzz.The
detectorisnowreadytouseintheNORMALmodeofoperation.OncethedetectorisGroundCompensated,remember
thenumbersettingontheGROUNDADJUSTcontrol,anduseitasastartingpointnexttime.
B.DISCRIMINATEMODETUNING.
TuningtheIncaforuseintheDiscriminatemoderequiresthattheNormalModetuningprocedurebeproperly
accomplished,astheGroundAdjustcontrolprovidesformineralfreeoperatinginboththeAllMetalandDiscrimmodes.Also,
thethresholdsettingoftheTuningcontroldeterminestheminimumsoundlevelfordeeptargetsintheDiscriminatemode.Too
littlethreshold,anddepthwillbelost.Toomuchthreshold,andthedetectormaybecomeerratic.
AftertheNormalmodeprocedureisaccomplished,theonlysettingsnecessaryforoperationinDiscriminatemodeisto
settheDiscLevelcontroltothedesiredamountoftrashrejection,andtosettheSensitivitycontrolthemaximumsettingthat
willallowsmoothoperation.
SELECTINGTHEPROPERMODEOFOPERATION
TheIncaofferstwobasicmodesofoperation,theNormalmode(AllMetal)andtheDiscriminatemode.Bothmodesare
mineralfreeiftheunitisproperlyadjusted.TheNormalmodeistheindustrystandard"VLF"typewhichdoesnotrequire
motionofthesearchcoilforproperoperation.Thismode,whilerequiringaninitialgroundadjustsettingofsoundthreshold,
offerstwoveryimportantadvantages,thesebeingtheabilitytopinpointwithoutmotion,andtoprovideexactground
canceling.TheDiscriminatemodeisbasedonmotionofthesearchcoil,butrequiresverylittlemotion,andoffersthe
advantageofcompletelysilentoperation.Pushbuttonmodechangebetweenthesetwomodesisalsoincluded,offeringthe
mostversatile"onehanded"operatingsystem.
Sincethethresholdsoundwill"comeandgo"asthepushbuttonisusedtochangemodes,athirdoperationmodewas
added,thisbeingtheNormalOnlymode.Inthismode,themodechangefeatureisdefeated,andthedetectorwillretuneto
thresholdwhenthepushbuttonisdepressed.
TheNormalOnlymodeisthebetmodefortheinitialgroundadjustandthresholdadjustments,sincethethresholddoes
notgoawaywhenthebuttonispushed.Thismodewouldprobablyethebestchoiceforsomeonewhoisnuggethuntingor
relichunting,andisnotinterestedinswitchingtoDisc.
ThepushbuttonmodechangefeatureoftheIncaallowstheusertheoptionsofeithersearchinginnormalmodetofindall
targetsandswitchingtodiscriminatetocheckthem,ortosearchindiscriminateandswitchtonormaltopinpointand
measuredepth.Theformermethodhashistoricallybeenthemostthoroughwaytosearchagivenarea,buttheextraslow
sweepoftheIncatendstoovercomemostofthedisadvantagesofsearchingindiscriminate,somostpeoplewillprobably
operateindiscriminatebecauseofthesilentoperation.
Earliermotiondiscriminatorsthatareoperatedwiththe"Threshold"soundwouldgivetheuseradefiniteindicationof
metallictrashbyeithernullingcompletelyorbygeneratingshort,choppysounds.SincetheDiscriminatemodeoperates
withoutthresholdsound,thereisnonullingtoindicatethattheareaisextremelytrashy.WhensearchingintheDiscriminate
mode,werecommendthatyouperiodicallyswitchtoNormalmodeandchecktheareayouaresearchingtogetanideaof
howmuchtrashisreallythere.Inextremelyheavytrashareas,itmaybedesirabletoswitchtoasmallersearchcoil,even
throughdoingsowillcausealossofdepth.Thesmallercoilwillallowyouabetterchanceoffindingcoinsbetweentheclose
piecesoftrash.
FIELDUSE
Thedetectorshouldbeheldinapositionthatiscomfortableforyou.Swingthedetectorfromsidetosideinaboutathree
footarc,overlappingsucceedingstrokeswell.Thismotioniscalleda“sweep.”TheIncawasdesignedtogetmaximumdepth
withoutthefranticpacerequiredofearliermotiondetectors,sogoatapacethatiscomfortableforyou.Infact,tryingtohunt
toofastinDiscriminatemayevencausealossofdepthinheavilymineralizedlocations.
Itwouldbehelpfultoburysomecoinsandtrashmetaljunkitemsinanareathatyouknowisclearofothermetal
objects,andthentrytheunitinitsvariousmodes.ChecktheareainAllMetalModefirsttobesureitsclearoftrashthen
burythetargetsatleastafootapart,andfrom2to6inchesdeeptostart.Makeamapofthetestbedtobesureyouknow
whateachtargetisandhowdeepitis.Practiceonthesetargetstofamiliarizeyourselfwithyourdetector’stargetresponse.
ThiswillalsohelpyoulearnthepropersweeprateforDISCoperation.
InNormalmodeoperation,keepthedetectortunedsothatthereisjustaslightbuzzingofasound.Thisiseasytodo
becausethegroundmineralsdonotaffecttheNormalmodeifproperlyadjusted.Regardlessofwhichmodeyouareusing,try
tokeepyoursearchcoilheightconstantandclosetotheground.Mostpeopletendtoraisethecoilattheendofasweep,
muchlikeapendulum,especiallyiftheyarehurrying.Trytoavoidthis,asanyincreaseinheightwillcauseacorresponding
lossofdepth.
Inareaswithwellkeptlawns,theeasiestwaytomaintainaconstantsearchcoilheightistoallowthecoiltorestonthe
grassasyousweepfromsidetoside.Inroughandrockyareasitisbestnotto“scrub”thecoilontheground,astherocks
willactlikeabrasives,andwearawaythecoilbottom(anoptionalcoilscuffcoverwillprotectagainstthis.)Sweepthecoilas
closetothegroundaspossiblewithouttouching.Hittingthegroundorrocksmaycauseafalsesignalmuchlikeadesired
targetwould.Sweepingthecoiltoohighabovethegroundresultsinalossofdepth.
WhenoperatingintheDiscriminateMode,some“falsesignals”maybecausedby1)heavyconcentrationsoftrashmetal
objects,2)verylargetrashmetalobjects,or3)electricalinterference.Thesesignalswillsounddifferentthangoodtarget
signalsbecausetheyaregenerallyshort,choppysounds.Attheendofyoursweep,asyouthereversethecoildirection,the
detectorismostsusceptibletotrashinducednoise.Therearetwowaystotellwhetherthesesoundsaregooddeepsignals
ortrash“noise.”Thefirstisbyrepeatability.Trashinducednoiseswillnotberegularasyousweepthecoiloverthesuspected
targetseveraltimes,whereasagoodtargetresponsewillberepeatable.ThesecondmethodistoswitchtoAllMetalMode
andcheckthetargetresponsesound.Iftheresponseisweak,itmaywellbeadeep,goodtarget;butiftheresponseisvery
strong,itisprobablytrash.Notethatacoinclosetothesurfacecangiveadoublebeepsound,butitisregularand
repeatable.Raisingthecoilaninchortwowillrestorethesinglebeeponsurfacetargets.
Ifthereisanydoubtwhetheratargetisgoodornot,DIGIT.Forthissamereason,intheDiscriminateMode,itisbest
nottouseahigherDISCLEVELsettingthannecessary.NickelsandmostsmallerringsarerejectedwhentheDISCLEVEL
issettorejectpulltabsonanymetaldetectorthatisaTRDiscriminatorliketheInca.Ifyoudon’tdiganyjunkatall,youare
surelypassingupalotofgoodfindsaswell.SettheDISCLEVELonlyhighenoughtosuittheconditionswhereyouare
searching.
ThesweepspeedoftheIncaisslowenoughtoallowpinpointingintheDiscriminateMode,butwillrequirealittlemore
practice.Movethecoilslowlyfromsidetosideandthenfromfronttobackoverthetarget.Raisingthecoilslightlyand
slowingthesweepspeedwillnarrowdownthedetectionareaenoughthatit'seasytotellwherethecoilcenterisatthe
instantofthesound.
TopinpointinNormalmodedoesnotrequireanymotion,somaybeeasierformostpeople.Topinpointatargetthat
doesn'tsaturatetheaudio,justmovethecoilforwardandback,andsidetosideuntilyougetthestrongestsound.Thetarget
willbedirectlybelowthecoilcenter.Iftheaudiosaturatesoveralargearea,simplypushthetuningmodeswitchtotheretune
positionmomentarilyovertheareatodetunethedetector.Thiswillnarrowitsfieldofresponsetoallowyoutoonceagain
seektheareaofstrongestresponse.Itmaybenecessarytoretunemorethanoncewiththistechnique.Thecoindepthmeter
isalsoagoodpinpointingtool,sinceitdoesn'tsaturateundernormalconditions.SimplyswitchtoNormaltothesideofthe
target,movethecoiloverthetarget,andmoveituntilyougetthemostforwarddeflectionofthemeter.Thiswillnotonlytell
youtargetcenter,butdepthalsoifyoudidnottuneoveratarget.
RECOMMENDEDRECOVERYMETHODS
Alwaysobtainpermissionfromthepersoninchargebeforehuntingonprivateproperty,schoolyards,parks,churches,or
stateparks.Evenwhenrelichuntinginthewoods,NEERLEAVEAHOLE!,ordamageanythingontheproperty.
PROTECTYOURHOBBYFILLALLHOLES
BATTERYREPLACEMENT
TheIncahasanautomaticbatterytestcircuitsoyoucanalwaysknowyou'regettingtopperformancefromyourdetector.
Thebatteriesshouldbetestedafterthedetectorhasbeenoperatedforabouttenminutes,andwhilethedetectorismakinga
loudnoise,sothebatteriesareproperlyloaded.Tocheckthebatteries,simplyturntheIncaofforaboutfiveseconds,and
thenturnitbackonandrotatetheTUNINGcontrolcompletelyclockwise.DepresstheTUNING/MODECHANGEbuttonifitis
notmakinglotsofsound.Themeterwillindicatethebatterystrengthforaboutfourseconds.Ifthemeterreadslessthan.6
duringthisperiod,replacethebatteries.
Toreplacethebatteries,pullthelargeknobonthebatterydooronthefrontoftheunit.Theentiredoorwillpopout.
Removethebatterypackfromthedetector,andthenremovethebatteriesfromthepack.Replacethenewpenlightbatteries
intothepack,observingthepolarityindicatorsthatareembossedintotheinsidesofthepack.Slidethepackbackintothe
detector,makingsurethatthebatteryclipleadisconnectedtothepack.Installthebatterydoorflangeintothetopofthe
cutoutinthechassis,andpushthenylonfastenerintotheholeatthebottomofthechassis,makingsurethattheplungers
arestillpulledout.Thenpushtheplungerbackintolockthedoorinplace.
Shouldyoudesiretodoso,rechargeableNickelCadmiumbatteriescanbesubstitutedforstandardpenlightcells.
IndividualAAsizecellsarereadilyavailableatmostelectronicsupplystores,aswellasthechargersforthem,andtheycan
beinsertedintothestandard8holderusedinyourInca.Theinitialbatterycheckreadingwillbeslightlylower,butwillnot
dropasmuchwithuse,untilthebatteriesarecompletelydischarged.
GENERALCAREANDUSE
Ifthedetectoristobestoredforalongperiodoftime,itisbesttoremovethebatterypackfromthedetector.Thiswill
preventinternaldamagetothedetectorifthebatteriesshouldleak.
Thesearchcoiliswaterproofandmaybesubmergedineitherfreshorsaltwater.Cautionshouldbeexercisedtoprevent
waterfromenteringthechassis,whereitcoulddamagetheelectroniccircuitry.Afterthecoilisusedinsaltwater,thecoil
andlowerstemassemblyshouldberinsedwellwithfreshwatertopreventcorrosionofthemetalparts.Whenusedinthe
bodymountconfiguration,youshouldnotallowthecableconnectorstobesubmerged.
Thereareseveralgoodbookstohelpthebeginnerlearnhowtousethedetector,wheretosearchandhowtorecovera
targetwithoutdamagingtheenvironment.Agoodcoinshootercanrecoveralotoffindsandleavethearealookingasthough
hehadneverbeenthere.Aboveall,alwaysfillyourholeswhenyouhaverecoveredthetarget.
TESOROMetalDetectorsaresoldthroughindependentdealers,whoarealmostalwaystreasurehuntersthemselves.
Theycanprovideyouwithyoumuchneededinformationabouthowtouseyourdetector,howtoprobe,pluganddiginyour
locale,andanswermostofyourquestionsabouttreasurehuntingingeneral.
Theuseofearphoneswillbenefityouintwoways.Mostearphoneswillveryeffectivelyblockoutmostoftheambient
noise,suchastrafficnoiseandwindnoise,whichwillenableyoutobetterhearthefaintersignalscausedbythedeeper
targets.Obviously,theolder,morevaluablecoinswillprobablybedeeperthantheoneswhichwerelostlastweek,soyou
shouldtakeadvantageofanythingthatwillhelpyouheartheweakersignals.Secondly,usingearphoneswillgreatlyextend
thebatterylife,sinceittakesmuchlesspowertooperatethem.Thedetectorisnotequippedwithavolumecontrol,butdoes
havealimitingcircuitintheearphonejack.Iflessvolumeisdesiredwithearphones,youmaywanttouseearphoneswitha
builtinvolumecontrol.Anygood8or16ohmsetwith1/4inchstereojackwilldo.
HAPPYHUNTING,andthankyouforpurchasingaTESORO.
Underthecopyrightlawsthisdocumentationmaynotbecopied,photocopied,reproduced,translatedorreducedtoanyelectronicor
machinereadableform,inwholeorinpart,withoutthepriorwrittenconsentofTesoroElectronicsIncorporated,exceptfortheprivate
useofaIncaowneroroperator,orinamannerotherwisedescribedinthisdocumentation.
©19951996TesoroElectronicsIncorporated.Allrightsreserved.PrintedintheUnitedStates.
WARRANTYSERVICE
YourTesorometaldetectoriscoveredbyaLimitedLifetimeWarranty,the
termsofwhicharelistedbelow.Ifyourmetaldetectorshouldrequireservice,you
mayreturnittotheTesorofactory,ortoneofthefactoryauthorizedservice
centers.Contactthefactoryforthenameandaddressofthenearestservice
center.
Ifyouhaveanyquestions,don'thesitatetocontactthefactory.
LIMITEDLIFETIMEWARRANTY
Thiswarrantygivesyouspecificlegalrights,andyoumayhaveotherrights
whichvaryfromstatetostate.
Thisinstrumentiswarrantedtobefreeofdefectsinmaterialandworkmanship
aslongasitisownedbytheoriginalconsumerpurchaser.Thiswarrantyisnot
transferable,andisvalidonlyifthewarrantyregistrationcardhasbeencompleted
andmailedwithin10daysofpurchase.
Duringthefirsttwoyears,TESOROwill,atitsoption,repairorreplaceany
instrumentcoveredbythiswarranty,withoutcharge,exceptfortransportation
charges,atitsfactoryinPrescott,Arizona,oratoneofitsauthorizedrepair
centers.Aftertwoyearsfromdateofpurchase,TESOROwillreplacedefective
partsatnochargeexceptanominallaborchangeandtransportationcharges.
Thiswarrantyexcludesbatteries,damagecausedbyleakybatteries,cable
breakageduetoflexingonbodymountunits,andwearofthesearchcoilhousing.
Alsoexcludedareinstrumentswhichhavebeenabused,altered,orrepairedbyan
unauthorizedparty.
Ifwarrantserviceshouldbenecessary,contactthefactorfornearestrepair
center.
TesoroElectronics,Inc.715WhiteSparRoadPrescott,AZ,USA8630319287712646
OperatingFrequency 12kHz
SearchcoilType Concentric
SearchcoilSize 81/2"Diameter
CableLength Approx.3’
AudioFrequency Approx.375Hz
AudioOutput 21/4"speaker
HeadphoneCompatibility 1/4"stereoearphonejack
Weight(mayvaryslightly) 3lbs.14oz.nominal
BatteryRequirement 12voltsDC
8AApenlightbatteries
BatteryLife(typical) 15to30hours
OptimumTemperatureRange 30°to100°F
OptimumHumidity 0to75%R.H.
OperatingModes
Normal(AllMetal)
Discriminate
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IncaOPERATORINSTRUCTIONMANUAL

CONGRATULATIONS!

YournewTESOROMetalDetectorwasdesignedtoprovideyouwithmanyhappyhoursofenjoymentinthemost

rewardinghobbyIcanthinkof–treasurehunting.Aheadofyouliefascinatingandexcitingexperiencesasyoustepintothe

past–uncoveringartifactslostbypastgenerations.Iwishwecouldsharetheseexperienceswithyou,andwewishyouthe

bestofsuccess.

YourTESOROMetalDetectoriscapableofmeetingyourneedsinanyconceivabletreasurehuntingsituation.Aswith

anydetector,operatingskillandfamiliaritywiththisinstrumentareprobablythelimitingfactorsindetermininghowsuccessful

youwillbe.Werecommendthatyoureadthismanualandunderstandfullybeforeattemptingtousetheinstrumentinthe

field.Asyoubecomemorefamiliarwithyourdetectorthroughpractice,yourrateofsuccesswillincreasedramatically.

TheTESOROMetalDetectorisaprecisionelectronicinstrument,whichwilllastforyearsifproperlycaredfor.Treatit

rightanditwon'tletyoudown.

GoodHunting!JackGifford

GENERALDESCRIPTION

TheAztecisaTransmitterreceiver(TR)MetalDetector,operatingintheverylowfrequency(VLF)portionoftheRF

spectrum.Thedetectorutilizesthenaturalphenomenaofthephasedelayofalltargetstoprovidemineralfreeorground

compensatedresponseinthenormalmodeofoperation,ortoprovidediscriminatecapabilityinthediscriminatemode.

TheAztecisanextremelysensitivemetaldetector,butbecauseofitsuniquepushbuttonMODECHANGE/TUNING

SWITCHistheeasiest"onehanded"VLF/TRDiscriminatortouse.

Aswithanydetector,thefamiliarityoftheuserwiththeinstrumentwillhaveagreatdealtodowithhowsuccessfulthe

treasurehunteris.Werecommendthatyoureadandunderstandthismanualfullybeforeattemptingtousetheinstrumentin

thefield.

Besuretofilloutandmailyourwarrantyregistrationcardtovalidateyourwarranty.

ASSEMBLY

AssemblyoftheIncaisverysimple,andrequiresnospecialtools.Theonlyassemblyrequiredistomountthesearchcoil

totheendofthelowerstemandtoinstallthelowerstemandlocknutassemblytotheupperstem.

1. Depressthetwobuttonsontheupperendofthelowerstem,andslideitintotheupperstem.Pushthelowerstem

upsothatthebuttonsclickintothethirdsetofholesfromtheendoftheupperstem.

2. Insertthepoletipbetweenthemountingearsofthesearchcoil,afterremovingthescrewandthumbnut.Alignthe

holesinthepoletipandthoseinthemountingears.

3. Insertthecoilmountingscrewthroughthecoilandpoletip.Thescrewheadshouldbeonthesideofthesearchcoil

wherethecablecomesout.

4. Installthethumbnutonthescrewandtightenbyhand.

5. Windthesearchcoilcablearoundthepolebydepressingthespringbuttonsandturningthelowerstemaround

severaltimesasnecessary.

ADJUSTMENT

Thesearchcoilangleandstemlengthshouldbeadjustedsothattheunitisnotuncomfortableortiringafterlongperiods

ofuse.Thestemlengthisadjustedbydepressingthespringbuttonsandextendingorshorteningthepoletilltheyclickinto

theholesthatgiveyouthemostcomfortablesetting.Thecoilshouldbeaboutoneinchabovethegroundwhilestandingerect.

Adjusttheangleofthesearchcoil,sothatthecoilisparalleltotheground.Tightenthesearchcoilthumbnutbyhandto

maintainthissetting.

Thearmrestontherearofthehandlecanbemovedforwardbyremovingthescrewsandnuts,andreinstallingthe

assemblyintothemostforwardsetofholes.

SPECIFICATIONS

CONTROLS

ThefunctionofthefrontpanelcontrolstheIncaareasfollows.

1. ON/OFF,TUNING,BATTERYTEST.Thiscontrolisusedtotunethedetectortoit'smostsensitivelevel(Threshold)

regardlessofwhichmodeofoperationisbeingused.Italsocontrolsthepowerforthedetector,andactivatesthe

automaticbatterytestcircuitry.TheMODEcontrolshouldalwaysbeintheNORMALONLYpositionandthe

MODE/TUNINGswitchdepressedwhensettingtheunittothresholdwiththeTUNINGcontrol,orwhencheckingthe

batteries.Thebatteriesshouldbetestedafterabout10minutesofoperation,andwithamoderatetoheavyamountof

sound.Turnthedetectoroffmomentarily,andthenbackon,turningtheTUNINGcontrolcompletelyclockwisetomake

maximumsound.Thedetectorwillremaininthebatterytestmodeforabout3to5seconds.Ameterreadingof.6or

aboveindicatesthebatterystrengthisadequateforproperoperation.Ifthemeterreadingisbelow.6,replacethe

batteries.Thenaftercheckingthebatteries,retunetothresholdbeforereleasingtheMODE/CHANGETUNINGSWITCH

andturningtheMODEcontrolswitchtothedesiredmodeofoperation.

2. GROUNDADJUST.Thecontrolisusedtoadjustthedetectorsothatitdoesn'trespondtothemineralizationinthe

groundwhenusedintheNORMAL(allmetal)mode.TheGROUNDADJUSTiseasiertosetwhentheMODEswitchisin

theNORMALONLYposition,sincethethresholdwillremainwhentheMODECHANGE/TUNINGSWITCHisdepressed

inthisposition.

3. DISCRIMINATELEVEL.Thiscontrolisusedtoadjustthedetector'sresponsetounwantedmetallictrashwhenused

intheDiscriminatemode.Atthelowestsetting"0",thedetectorwilleliminatemostironobjects,butwillstillrespondina

positivemannertolightfoil,bottlecaps,pulltabsandmostothermetallicitems.Astheknobsettingisincreased,

responsetomoreofthesemetallictrashitemsisreversedsothattheseobjectsgivenoresponse.

4. DISCRIMINATESENSITIVITY.SincetheIncaisamineralfreediscriminator,thiscontrolwillusuallybesetatthe

maximum.Therearesituations,however,wherereducingthesensitivitywillyieldbetterperformance.Thesesituations

willusuallybeselfevidentduetospuriousnoise"signals"causedbyveryheavymetallictrashconcentrations,minerals,

orRForpowerlineinterference.Setthiscontrolashighaswillallowyoutooperatewithatolerablelevelofinterference.

5. MODESWITCH.Thisswitchisathreepositionrotarycontrolwhichselectsthedetector'sbasicoperatingmode.In

theNORMALONLYmode,thepushbuttonMODECHANGE/TUNINGswitchactsasaTUNINGswitchonly,andno

modechangeisaccomplishedwhenthepushbuttonisdepressed.IntheNORMALorDISCRIMmodes,depressingand

holdingthepushbuttoncausesachangetotheothermode.Whenthepushbuttonisreleased,thedetectorreturnsto

themodeselectedbytheMODESWITCHtohelpyourememberwhichcontrolsareoperationalineachofthetwobasic

modes.

6. TUNING/MODECHANGESWITCH.Thispushbuttonswitchislocatedintheendofthehandle,whereitcanbe

operatedwiththethumbofthehandholdingthedetector.Thisswitchperformstwofunctions.

A. Whendepressedmomentarilyandreleased,itretunesthedetectorbacktothedesiredthreshold,wheninNORMALONLYmode. 

B. Whenheldinthedepressedposition,itcausesthedetectortoswitchtotheotherbasicmode.IftheMODEswitchisintheNormal

position,holdingthebuttondownwillcausethedetectortoswitchtoDiscriminateMode.IftheMODEswitchisintheDiscriminateposition,

holdingthebuttondownwillcausethedetectortoswitchtoNormalmode.Whenthebuttonisreleased,thedetectorreturnstothemode

selectedbytheModeswitch.

7. METER.Themeterandit'sassociatedcircuitry,whilenotreallyacontrol,servestwoimportantfunctions.

A. BATTERYTEST.Thisfunctionisautomaticallyperformedforabout4secondseachtimethedetectorpoweristurnedon.Themeter

readingwillbeabovethe.6markontheintensityscalewhentheunitismakingaloudnoiseifthebatterystrengthisadequateforproper

performance.

B. COINDEPTH.IntheNORMALposition,themeterwillindicateapproximatedepthofthedetectedtarget,assumingthetargettobecoin

size.IntheDISCRIMmode,thedepthreadingfeaturewillbeinoperable.

ThecoindepthreadingfeatureoftheIncaisanextremelyusefulaidinpinpointing.Thereadingwillreachit'smaximumforwarddeflection

onthemeterneedlewhenthesearchcoilisdirectlyoverthetarget,andthemeterreadingwillthenindicatetheapproximatetargetdepth.

TUNING

Nodetector,regardlessofhowpowerfulitis,canprovideoptimumdepthifitisimproperlytuned.Infact,themore

powerfuladetectoris,themorecriticalthetuningbecomes.Lesspowerfulunitsaremoretolerantofoperatormisadjustment,

butarenotcapableofthedepthofaproperlytunedhighpowerdetectorsuchastheInca.

ToachievemaximumperformancefromyourIncabesuretoproperlyadjusttheGROUNDADJUSTandTUNINGcontrols

intheNormalModeonly.Thesettingsofthesecontrolswillalsoaffectthedetector'sperformanceintheDiscrimmode,sobe

suretoadjustthemproperly,evenifyouonlyplantooperatethedetectorintheDiscrimmode.

FollowingthetuningproceduresoutlinedbelowwillhelpyouproperlytuneyourInca,andwillallowyoutofullyutilizeits

performancecapabilities.

A.NORMALMODETUNING.NormalModeTuning.

1. SettheModeSwitchtotheNormalOnlyposition.

2. Depressthehandlemountedpushbuttonswitch,andturntheOn/OffTuningcontrolcompletelyclockwise.Checkto

seethatthebatteryreadingisabove.6.

3. Afterthebatterytestperiodahselapsed,turntheTuningcontroldownsothedetectorismakingjustamoderate

buzz.BesuretokeepthepushbuttondepressedwhilesettingtheTuningcontrol.

4. Holdthesearchcoilabouttwofeetabovetheground,andreleasethepushbutton.

5. Lowerthesearchcoiltoaboutoneortwoinchesabovetheground,andnoticeanychangesintheaudiosoundas

thisisdone.

6. Iftheaudiosoundlevelincreased,turntheGroundAdjustcontrolslightlylower.NotethatturningtheGroundAdjust

controlwillcauseachangeintheaudiolevel.Ignorethischange,asitisofnoconsequence.Theonlychangeofconcern

isthatchangewhichoccursasthesearchcoilisloweredtotheground.

7. Raisethesearchcoiltoabouttwofeetabovetheground,andmomentarilydepressthepushbuttontoretunethe

detectortothemoderatebuzz.

8. Repeatsteps5,6,and7,untilthereisalmostnochangeintheaudiolevelasthesearchcoilisloweredtothe

ground.NOTE:thegroundmustbefreeofallmetallicitemswherethecoilislowered.Ifyoucannotadjustthedetectorto

dothis,youmaybeoverapieceofmetal.Movetoanotherspotandtryagain.

9. Momentarilydepressthetuningswitch,andturntheTUNINGcontroldowntogetjustafaintaudiobuzz.The

detectorisnowreadytouseintheNORMALmodeofoperation.OncethedetectorisGroundCompensated,remember

thenumbersettingontheGROUNDADJUSTcontrol,anduseitasastartingpointnexttime.

B.DISCRIMINATEMODETUNING.

TuningtheIncaforuseintheDiscriminatemoderequiresthattheNormalModetuningprocedurebeproperly

accomplished,astheGroundAdjustcontrolprovidesformineralfreeoperatinginboththeAllMetalandDiscrimmodes.Also,

thethresholdsettingoftheTuningcontroldeterminestheminimumsoundlevelfordeeptargetsintheDiscriminatemode.Too

littlethreshold,anddepthwillbelost.Toomuchthreshold,andthedetectormaybecomeerratic.

AftertheNormalmodeprocedureisaccomplished,theonlysettingsnecessaryforoperationinDiscriminatemodeisto

settheDiscLevelcontroltothedesiredamountoftrashrejection,andtosettheSensitivitycontrolthemaximumsettingthat

willallowsmoothoperation.

SELECTINGTHEPROPERMODEOFOPERATION

TheIncaofferstwobasicmodesofoperation,theNormalmode(AllMetal)andtheDiscriminatemode.Bothmodesare

mineralfreeiftheunitisproperlyadjusted.TheNormalmodeistheindustrystandard"VLF"typewhichdoesnotrequire

motionofthesearchcoilforproperoperation.Thismode,whilerequiringaninitialgroundadjustsettingofsoundthreshold,

offerstwoveryimportantadvantages,thesebeingtheabilitytopinpointwithoutmotion,andtoprovideexactground

canceling.TheDiscriminatemodeisbasedonmotionofthesearchcoil,butrequiresverylittlemotion,andoffersthe

advantageofcompletelysilentoperation.Pushbuttonmodechangebetweenthesetwomodesisalsoincluded,offeringthe

mostversatile"onehanded"operatingsystem.

Sincethethresholdsoundwill"comeandgo"asthepushbuttonisusedtochangemodes,athirdoperationmodewas

added,thisbeingtheNormalOnlymode.Inthismode,themodechangefeatureisdefeated,andthedetectorwillretuneto

thresholdwhenthepushbuttonisdepressed.

TheNormalOnlymodeisthebetmodefortheinitialgroundadjustandthresholdadjustments,sincethethresholddoes

notgoawaywhenthebuttonispushed.Thismodewouldprobablyethebestchoiceforsomeonewhoisnuggethuntingor

relichunting,andisnotinterestedinswitchingtoDisc.

ThepushbuttonmodechangefeatureoftheIncaallowstheusertheoptionsofeithersearchinginnormalmodetofindall

targetsandswitchingtodiscriminatetocheckthem,ortosearchindiscriminateandswitchtonormaltopinpointand

measuredepth.Theformermethodhashistoricallybeenthemostthoroughwaytosearchagivenarea,buttheextraslow

sweepoftheIncatendstoovercomemostofthedisadvantagesofsearchingindiscriminate,somostpeoplewillprobably

operateindiscriminatebecauseofthesilentoperation.

Earliermotiondiscriminatorsthatareoperatedwiththe"Threshold"soundwouldgivetheuseradefiniteindicationof

metallictrashbyeithernullingcompletelyorbygeneratingshort,choppysounds.SincetheDiscriminatemodeoperates

withoutthresholdsound,thereisnonullingtoindicatethattheareaisextremelytrashy.WhensearchingintheDiscriminate

mode,werecommendthatyouperiodicallyswitchtoNormalmodeandchecktheareayouaresearchingtogetanideaof

howmuchtrashisreallythere.Inextremelyheavytrashareas,itmaybedesirabletoswitchtoasmallersearchcoil,even

throughdoingsowillcausealossofdepth.Thesmallercoilwillallowyouabetterchanceoffindingcoinsbetweentheclose

piecesoftrash.

FIELDUSE

Thedetectorshouldbeheldinapositionthatiscomfortableforyou.Swingthedetectorfromsidetosideinaboutathree

footarc,overlappingsucceedingstrokeswell.Thismotioniscalleda“sweep.”TheIncawasdesignedtogetmaximumdepth

withoutthefranticpacerequiredofearliermotiondetectors,sogoatapacethatiscomfortableforyou.Infact,tryingtohunt

toofastinDiscriminatemayevencausealossofdepthinheavilymineralizedlocations.

Itwouldbehelpfultoburysomecoinsandtrashmetaljunkitemsinanareathatyouknowisclearofothermetal

objects,andthentrytheunitinitsvariousmodes.ChecktheareainAllMetalModefirsttobesureitsclearoftrashthen

burythetargetsatleastafootapart,andfrom2to6inchesdeeptostart.Makeamapofthetestbedtobesureyouknow

whateachtargetisandhowdeepitis.Practiceonthesetargetstofamiliarizeyourselfwithyourdetector’stargetresponse.

ThiswillalsohelpyoulearnthepropersweeprateforDISCoperation.

InNormalmodeoperation,keepthedetectortunedsothatthereisjustaslightbuzzingofasound.Thisiseasytodo

becausethegroundmineralsdonotaffecttheNormalmodeifproperlyadjusted.Regardlessofwhichmodeyouareusing,try

tokeepyoursearchcoilheightconstantandclosetotheground.Mostpeopletendtoraisethecoilattheendofasweep,

muchlikeapendulum,especiallyiftheyarehurrying.Trytoavoidthis,asanyincreaseinheightwillcauseacorresponding

lossofdepth.

Inareaswithwellkeptlawns,theeasiestwaytomaintainaconstantsearchcoilheightistoallowthecoiltorestonthe

grassasyousweepfromsidetoside.Inroughandrockyareasitisbestnotto“scrub”thecoilontheground,astherocks

willactlikeabrasives,andwearawaythecoilbottom(anoptionalcoilscuffcoverwillprotectagainstthis.)Sweepthecoilas

closetothegroundaspossiblewithouttouching.Hittingthegroundorrocksmaycauseafalsesignalmuchlikeadesired

targetwould.Sweepingthecoiltoohighabovethegroundresultsinalossofdepth.

WhenoperatingintheDiscriminateMode,some“falsesignals”maybecausedby1)heavyconcentrationsoftrashmetal

objects,2)verylargetrashmetalobjects,or3)electricalinterference.Thesesignalswillsounddifferentthangoodtarget

signalsbecausetheyaregenerallyshort,choppysounds.Attheendofyoursweep,asyouthereversethecoildirection,the

detectorismostsusceptibletotrashinducednoise.Therearetwowaystotellwhetherthesesoundsaregooddeepsignals

ortrash“noise.”Thefirstisbyrepeatability.Trashinducednoiseswillnotberegularasyousweepthecoiloverthesuspected

targetseveraltimes,whereasagoodtargetresponsewillberepeatable.ThesecondmethodistoswitchtoAllMetalMode

andcheckthetargetresponsesound.Iftheresponseisweak,itmaywellbeadeep,goodtarget;butiftheresponseisvery

strong,itisprobablytrash.Notethatacoinclosetothesurfacecangiveadoublebeepsound,butitisregularand

repeatable.Raisingthecoilaninchortwowillrestorethesinglebeeponsurfacetargets.

Ifthereisanydoubtwhetheratargetisgoodornot,DIGIT.Forthissamereason,intheDiscriminateMode,itisbest

nottouseahigherDISCLEVELsettingthannecessary.NickelsandmostsmallerringsarerejectedwhentheDISCLEVEL

issettorejectpulltabsonanymetaldetectorthatisaTRDiscriminatorliketheInca.Ifyoudon’tdiganyjunkatall,youare

surelypassingupalotofgoodfindsaswell.SettheDISCLEVELonlyhighenoughtosuittheconditionswhereyouare

searching.

ThesweepspeedoftheIncaisslowenoughtoallowpinpointingintheDiscriminateMode,butwillrequirealittlemore

practice.Movethecoilslowlyfromsidetosideandthenfromfronttobackoverthetarget.Raisingthecoilslightlyand

slowingthesweepspeedwillnarrowdownthedetectionareaenoughthatit'seasytotellwherethecoilcenterisatthe

instantofthesound.

TopinpointinNormalmodedoesnotrequireanymotion,somaybeeasierformostpeople.Topinpointatargetthat

doesn'tsaturatetheaudio,justmovethecoilforwardandback,andsidetosideuntilyougetthestrongestsound.Thetarget

willbedirectlybelowthecoilcenter.Iftheaudiosaturatesoveralargearea,simplypushthetuningmodeswitchtotheretune

positionmomentarilyovertheareatodetunethedetector.Thiswillnarrowitsfieldofresponsetoallowyoutoonceagain

seektheareaofstrongestresponse.Itmaybenecessarytoretunemorethanoncewiththistechnique.Thecoindepthmeter

isalsoagoodpinpointingtool,sinceitdoesn'tsaturateundernormalconditions.SimplyswitchtoNormaltothesideofthe

target,movethecoiloverthetarget,andmoveituntilyougetthemostforwarddeflectionofthemeter.Thiswillnotonlytell

youtargetcenter,butdepthalsoifyoudidnottuneoveratarget.

RECOMMENDEDRECOVERYMETHODS

Alwaysobtainpermissionfromthepersoninchargebeforehuntingonprivateproperty,schoolyards,parks,churches,or

stateparks.Evenwhenrelichuntinginthewoods,NEERLEAVEAHOLE!,ordamageanythingontheproperty.

PROTECTYOURHOBBYFILLALLHOLES

BATTERYREPLACEMENT

TheIncahasanautomaticbatterytestcircuitsoyoucanalwaysknowyou'regettingtopperformancefromyourdetector.

Thebatteriesshouldbetestedafterthedetectorhasbeenoperatedforabouttenminutes,andwhilethedetectorismakinga

loudnoise,sothebatteriesareproperlyloaded.Tocheckthebatteries,simplyturntheIncaofforaboutfiveseconds,and

thenturnitbackonandrotatetheTUNINGcontrolcompletelyclockwise.DepresstheTUNING/MODECHANGEbuttonifitis

notmakinglotsofsound.Themeterwillindicatethebatterystrengthforaboutfourseconds.Ifthemeterreadslessthan.6

duringthisperiod,replacethebatteries.

Toreplacethebatteries,pullthelargeknobonthebatterydooronthefrontoftheunit.Theentiredoorwillpopout.

Removethebatterypackfromthedetector,andthenremovethebatteriesfromthepack.Replacethenewpenlightbatteries

intothepack,observingthepolarityindicatorsthatareembossedintotheinsidesofthepack.Slidethepackbackintothe

detector,makingsurethatthebatteryclipleadisconnectedtothepack.Installthebatterydoorflangeintothetopofthe

cutoutinthechassis,andpushthenylonfastenerintotheholeatthebottomofthechassis,makingsurethattheplungers

arestillpulledout.Thenpushtheplungerbackintolockthedoorinplace.

Shouldyoudesiretodoso,rechargeableNickelCadmiumbatteriescanbesubstitutedforstandardpenlightcells.

IndividualAAsizecellsarereadilyavailableatmostelectronicsupplystores,aswellasthechargersforthem,andtheycan

beinsertedintothestandard8holderusedinyourInca.Theinitialbatterycheckreadingwillbeslightlylower,butwillnot

dropasmuchwithuse,untilthebatteriesarecompletelydischarged.

GENERALCAREANDUSE

Ifthedetectoristobestoredforalongperiodoftime,itisbesttoremovethebatterypackfromthedetector.Thiswill

preventinternaldamagetothedetectorifthebatteriesshouldleak.

Thesearchcoiliswaterproofandmaybesubmergedineitherfreshorsaltwater.Cautionshouldbeexercisedtoprevent

waterfromenteringthechassis,whereitcoulddamagetheelectroniccircuitry.Afterthecoilisusedinsaltwater,thecoil

andlowerstemassemblyshouldberinsedwellwithfreshwatertopreventcorrosionofthemetalparts.Whenusedinthe

bodymountconfiguration,youshouldnotallowthecableconnectorstobesubmerged.

Thereareseveralgoodbookstohelpthebeginnerlearnhowtousethedetector,wheretosearchandhowtorecovera

targetwithoutdamagingtheenvironment.Agoodcoinshootercanrecoveralotoffindsandleavethearealookingasthough

hehadneverbeenthere.Aboveall,alwaysfillyourholeswhenyouhaverecoveredthetarget.

TESOROMetalDetectorsaresoldthroughindependentdealers,whoarealmostalwaystreasurehuntersthemselves.

Theycanprovideyouwithyoumuchneededinformationabouthowtouseyourdetector,howtoprobe,pluganddiginyour

locale,andanswermostofyourquestionsabouttreasurehuntingingeneral.

Theuseofearphoneswillbenefityouintwoways.Mostearphoneswillveryeffectivelyblockoutmostoftheambient

noise,suchastrafficnoiseandwindnoise,whichwillenableyoutobetterhearthefaintersignalscausedbythedeeper

targets.Obviously,theolder,morevaluablecoinswillprobablybedeeperthantheoneswhichwerelostlastweek,soyou

shouldtakeadvantageofanythingthatwillhelpyouheartheweakersignals.Secondly,usingearphoneswillgreatlyextend

thebatterylife,sinceittakesmuchlesspowertooperatethem.Thedetectorisnotequippedwithavolumecontrol,butdoes

havealimitingcircuitintheearphonejack.Iflessvolumeisdesiredwithearphones,youmaywanttouseearphoneswitha

builtinvolumecontrol.Anygood8or16ohmsetwith1/4inchstereojackwilldo.

HAPPYHUNTING,andthankyouforpurchasingaTESORO.

Underthecopyrightlawsthisdocumentationmaynotbecopied,photocopied,reproduced,translatedorreducedtoanyelectronicor

machinereadableform,inwholeorinpart,withoutthepriorwrittenconsentofTesoroElectronicsIncorporated,exceptfortheprivate

useofaIncaowneroroperator,orinamannerotherwisedescribedinthisdocumentation.

©19951996TesoroElectronicsIncorporated.Allrightsreserved.PrintedintheUnitedStates.

WARRANTYSERVICE

YourTesorometaldetectoriscoveredbyaLimitedLifetimeWarranty,the

termsofwhicharelistedbelow.Ifyourmetaldetectorshouldrequireservice,you

mayreturnittotheTesorofactory,ortoneofthefactoryauthorizedservice

centers.Contactthefactoryforthenameandaddressofthenearestservice

center.

Ifyouhaveanyquestions,don'thesitatetocontactthefactory.

LIMITEDLIFETIMEWARRANTY

Thiswarrantygivesyouspecificlegalrights,andyoumayhaveotherrights

whichvaryfromstatetostate.

Thisinstrumentiswarrantedtobefreeofdefectsinmaterialandworkmanship

aslongasitisownedbytheoriginalconsumerpurchaser.Thiswarrantyisnot

transferable,andisvalidonlyifthewarrantyregistrationcardhasbeencompleted

andmailedwithin10daysofpurchase.

Duringthefirsttwoyears,TESOROwill,atitsoption,repairorreplaceany

instrumentcoveredbythiswarranty,withoutcharge,exceptfortransportation

charges,atitsfactoryinPrescott,Arizona,oratoneofitsauthorizedrepair

centers.Aftertwoyearsfromdateofpurchase,TESOROwillreplacedefective

partsatnochargeexceptanominallaborchangeandtransportationcharges.

Thiswarrantyexcludesbatteries,damagecausedbyleakybatteries,cable

breakageduetoflexingonbodymountunits,andwearofthesearchcoilhousing.

Alsoexcludedareinstrumentswhichhavebeenabused,altered,orrepairedbyan

unauthorizedparty.

Ifwarrantserviceshouldbenecessary,contactthefactorfornearestrepair

center.

TesoroElectronics,Inc.715WhiteSparRoadPrescott,AZ,USA8630319287712646

OperatingFrequency 12kHz

SearchcoilType Concentric

SearchcoilSize 81/2"Diameter

CableLength Approx.3’

AudioFrequency Approx.375Hz

AudioOutput 21/4"speaker

HeadphoneCompatibility 1/4"stereoearphonejack

Weight(mayvaryslightly) 3lbs.14oz.nominal

BatteryRequirement 12voltsDC

8AApenlightbatteries

BatteryLife(typical) 15to30hours

OptimumTemperatureRange 30°to100°F

OptimumHumidity 0to75%R.H.

OperatingModes

Normal(AllMetal)

Discriminate

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