Tesoro Deep Search VI Assembly instructions

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DeepSearchVIOPERATORINSTRUCTIONMANUAL
GENERALDESCRIPTION
TheDeepSearchVI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designoftheDeepSearchVIwasimplementednotonlytoprovideexcellentsensitivity,buttoprovideaunitwhichis
easytouseforboththebeginnerandtheexperttreasurehunter.
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DeepSearchVI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installthelowerstemandlocknutassemblytotheupperstem.
1. 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.
2. Insertthecoilmountingscrewthroughthecoilandpoletip.Besuretheinternaltoothlockwasherisonthescrew
headside.Thescrewheadshouldbeonthesideofthesearchcoilwherethecablecomesout.
3. Installthethumbnutonthescrewandtightenbyhand.
4. Theknurledlocknutisinstalledontheupperstemtoprotectthethreadsduringhandlingandshipment.Removethe
locknutandslideitontothelowerstemasshown.Besurethelockringisinsidethelocknutorbehindit,sothatitwill
bepushedintothelocknutwhenthelocknutisreinstalledonthethreads.
5. Insertthelowerstemintotheupperstem,pushthelocknutuptoengagethethreads,andtightenitfingertight.
6. Windthesearchcoilcablearoundthepole,andinstallthesearchcoilconnectorintotheconnectoronthefrontofthe
chassis.Tightentheconnectorfingertight.
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looseningtheknurledlocknutandextendingorcollapsingthestemlengthuntiltheunit
canbeheldaboutaninchoffthegroundwhilestandingerect.Adjusttheangleofthesearchcoil,sothatthecoilisparallelto
theground.Tightenthesearchcoilthumbnutandstemlocknutbyhandtomaintainthissetting.
CONTROLS
ThefunctionofthefrontpanelcontrolsoftheDeepSearchVIareasfollows,beginninginthelowerlefthandcorner,and
proceedinginaclockwisedirection.
1. ModeSwitch.Thisswitchisathreepositiontoggleswitchwhichselectsthebasicdetectoroperationmode.
A. BatteryTest.Thispositionisusedtochecktheconditionofthebatteries.Thebatterytestshouldbeperformedafterthedetectorhas
beenonforabout10minutes,andwithamoderatetoheavyamountofsound.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.
B. Norm.ThispositionselectsNormalorAllMetalmode.IntheNormalposition,thedetectorcanbeadjustedtoignoreground
mineralizationformaximumdepth,butthedetectorwillnotdiscriminateagainstunwantedmetalssuchasiron,bottlecaps,etc.
C. Disc.ThispositionselectstheDiscriminatemodeofoperation,wherebyresponsetounwantedmetalobjectssuchasiron,bottlecaps,
thinfoilpieces,etc.,canbecontrolled.Groundmineralizationwillaffecttheoperationofthedetectorinthismode. 
2. Disc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other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anegativeor"nulling"response. 
3. Tuning.Thiscontrolisusedtotunethedetectortoitsmostsensitivesetting,regardlessofwhichmodeisused.
SincethetargetresponseofaTRdetectorisanincreaseinsoundlevel,theidealsettingformaximumdepthissothat
thedetectorisjustbeginningtomakesound.This"threshold"settingshouldbemaintainedatalltimes,asoperatingthe
detectorcompletelysilentmeansadeeptargetmayhaveinsufficientresponsetodrivethedetectoroutofthequietregion
andinto"threshold".
4. Sensitivity.Thiscontroladjuststhedetector'ssensitivitytogroundeffectsduetomineralization,aswellasits
sensitivitytometallictargets.Inthenormalmodeofoperation,thedetectorwillignoreeffectsofmineralizationifitis
properlyadjusted,sothedetectorcanbeoperatedinmaximumsensitivityinalmostanygroundinthemode.Inthe
discriminatemode,thegroundeffectsarenotignored,sothedetectormayperformbetterinheavilymineralizedgroundat
reducedsensitivity.
5. GroundAdjust.Thiscontrolisusedtoadjustthedetectorsothatitdoesnotrespondtothemineralizationinthe
ground,whenusedinnormalmode.
6. ON/OFFVolume.Thiscontroladjuststheamplitudeoftheaudiosignal,aswellascontrollingthepowertotheunit.
Whenusingtheinternalspeaker,thevolumecontrolshouldbeatitsmaximumclockwisesettingformaximumdepth.
Whenusingheadphones,theinternalspeakerisdisconnected,andthevolumecontrolshouldbesetformaximum
comfortablevolume.
7. TuningPushButtonSwitch.Thisswitchislocatedintheendofthehandgripwhereitiseasilydepressedwiththe
thumb.Thisswitchisusedtoresetthedetectortuningtothedesiredthresholdanytimeconditionscauseatuning
changeinthedetector.
TUNING
A. NormalModeTuning.
1. TurnON/OFFVolumecontrolfullyclockwise.
2. TurntheGroundAdjustcontroltoabout6.Setthesensitivitycontroltomid range(pointerstraightup). 
3. HoldtheTuningpushbuttonswitchin.
4. TurnTuningcontrolasrequiredtogetamoderateaudiosoundandameterreadingofabout.4.
5. Holdthecoilabout2feetabovetheground,andreleasethepushbutton.
6. Lowerthesearchcoiltowithinaninchoftheground,andobservemeterreadingchangeandaudiochangeasthecoilislowered. 
7. Ifthemeterreadingandthesoundincrease,turntheGroundAdjustcontroldownslightly(counterclockwise).Ifthemeterreadingand
thesounddecrease,turntheGroundAdjustcontrolupslightly(clockwise).
8. Raisethecoilbacktoabouttwofeetabovetheground,andmomentarilydepresstheTUNINGswitchtore establishthetuningthreshold.
9. Repeatsteps6,7,&8asrequired,untilthereisalmostnochangeinthemeterreadingandthesoundasthecoilisloweredtothe
ground.NOTE: Thegroundmustbefreeofallmetallicitemswherethecoilislowered.IftheGroundAdjustcontrolisturnedcompletely
counterclockwiseandthedetectorstillgiveanincreaseasthecoilislowered,atargetisunderthecoil.Movetoanotherspotandrepeatthe
tuningprocedure.
10. PushtheTuningpushbutton,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Tuning.
1. TheDeepSearchVIwillgivebestoperationintheDiscriminateModeiftheGroundAdjustcontrolisproperlyadjustedasoutlinedin
theNormalModeTuning,soperformthisprocedurefirst.
2. PuttheModeSwitchintheDISCposition.AdjusttheDiscLevelcontroltoprovidethedesiredlevelofdiscrimination.
3. Holdthesearchcoilabout1to2inchesabovetheground.MomentarilydepresstheTuningpushbuttonswitchtoestablishthetuning
threshold.
4. Raiseandlowerthesearchcoilslightly,andnotethetuningchanges.Ifaslightupwardmovementcausesafullscalemeterdeflection
andmaximumaudio,thegroundisheavilymineralized,andmayrequirealowersensitivitysetting.Ifthedetectorcantolerateanupward
movementofseveralinchesbeforepeggingthemeterandaudio,thegroundislightlymineralizedandtheSensitivityknobcanprobablybe
adjustedhigher.
5. AdjusttheSensitivitycontroltothehighestsettingthatwillallowyoutosweepthedetectorfromsidetosideandstillmaintainthe
threshold.AttemptingtooperatethedetectorinDiscriminateModeatmaximumsensitivityinheavilymineralizedgroundwillalmostalways
resultinalossofperformance.
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.TheDeepSearchVIdoesnotneedtobehurried,sogoatapacethatdoesn'twearyouout.
Keepthedetectortunedsothatitisjustbeginningtobuzz.InNormalModethedetectorignorestheground,ifproperly
adjusted,sothisiseasytodo.InDiscriminate,thegroundwillaffectthedetector,soyoushouldsweepthedetectorata
constantheightabovetheground(about1inch).Irregularitiesintheground,aswellasinyoursweepheightwillcause
variationsinthetuning.Thesechangeswillusuallybemuchslowerthantheabruptsignalcausedbythecoilpassingovera
goodtarget.Alittlepracticewithacoinburiedabout1inchwillenableyoutopickoutthetargetsoundreadily,ascompared
tothebackgroundvariations.TurningtheSensitivitydownwillmakeiteasiertomaintainthreshold.Alwaysoperatein
DiscriminatewiththeSensitivitycontrolsetonlyashighaswillallowyoutooperateintheunitatthreshold.
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.
Topinpointorlocateatargetwhichdoesn'tpegthemeterandaudio,simplymovethecoilaroundtofindthepointwhere
theloudestaudioandhighestmeterreadingisgiven.Thetargetwillberightbelowthecenterofthecoil.Ifthetargetresponse
issostrongitpegsthemeterandaudio,simplypushthetuningbuttonmomentarilyoverthestrongestsignal.Thiswilltune
outmostoftheresponsetothetargetandthedetectorwillgototallyquietifitismovedawayfromthetarget.Itmaybe
necessarytoretuneacoupleoftimestoalmosttotallytuneoutthetarget,butyouwilleventuallyarriveatatuninglevelthat
willnotsaturateorpegthemeterandaudiowhenyouaredirectlyoverthetarget.
IntheDiscriminateMode,thetuningwillhavetoberesetanytimethattheDiscLevelischanged.Thismerelyrequires
thatyoumomentarilydepressthepushbuttontuningswitch.Bybeingfamiliarwithyourdetectorandwheretypicaljunkitems
arerejectedcansaveyoumuchneedlessdigging.
Onethingtoremember,though,isthatinDiscriminateMode,itisbestnottouseanyhigherDiscriminateLevelsetting
thannecessary.NickelsandmostsmallringsarerejectedwhentheDISCLEVELissettorejectpulltabsonallTR
Discriminators.Ifyoudon'tdiganyjunkatall,youaresurelypassingupalotofothergoodfindstoo.SettheDISCLEVEL
onlyhighenoughtosuittheconditionswhereyouaresearching.
Atlowersettingsofsensitivity,thedetectorcanusuallybeswitchedfromNormalModetoDiscriminateModeorvice
versawithoutaffectingthetuning.AtmaximumsensitivitysomesmalleffectmaybeencounteredwhenswitchingfromNormal
toDiscriminate,soifthethresholdsounddoesgoawayorgetstooloudwhenswitchingModes,simplydepresstheTuning
Buttonmomentarily.
Forrelichuntingorforcoinshootinginareasthatarefreeoftrash,theNormalModeofoperationwillnormallygivebest
results,sincethedetectoriseasytousewithmaximumsensitivity.Itmaybedesirabletooperatewithreducedsensitivityin
theNormalModeattimes,however.Forexample,topreventhavingtodiglarge,deepholesinawellkeptparklawn.
BATTERYREPLACEMENT
TheDeepSearchVIisequippedwithaninternalbatterycheck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forcetheaudioon,simplyholdthe
searchcoilnearalargemetalobjectwhilecheckingthebatteries,ordepressthetuningbuttonandturntheTuningcontrolfully
clockwise.
Ifthemeterreadslessthan.6,thebatteriesshouldbereplacedtoensurebestperformance.
Tochangethebatteries,depressthechromebuttonsoneachsideofthedetector,andslidethebatterycoveroffthe
backofthechassis.Thebatteriesarecontainedinaplasticholderjustbehindthecover.
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ineachbatterycompartmentofthebatterypack.
Replacethepackintotheholder,andreplacethebatterycoverbydepressingthechromebuttonsasthecoverisslid
backintothechassis.
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,orfromenteringtheupperstem,whereit
coulddamagethepushbuttonorleakintothechassis.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.
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DeepSearchVI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.
The7"coplanarsearchcoilfurnishedwiththeDeepSearchVIisoptimizedforcoinhunting,butwillworkaswellasmost
8"coilsforrelichunting.Theseriousrelichunterwillprobablywanttoconsiderthelargerwidescancoilsavailableforthe
DEEPSEARCHVI.Theyofferincreaseddepthforrelics,butatasacrificeinthediscriminationability.
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DeepSearchVI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.
TesoroElectronics,Inc.715WhiteSparRoadPrescott,AZ,USA863031928 7712646
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DeepSearchVIOPERATORINSTRUCTIONMANUAL
GENERALDESCRIPTION
TheDeepSearchVI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designoftheDeepSearchVIwasimplementednotonlytoprovideexcellentsensitivity,buttoprovideaunitwhichis
easytouseforboththebeginnerandtheexperttreasurehunter.
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DeepSearchVI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installthelowerstemandlocknutassemblytotheupperstem.
1. 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.
2. Insertthecoilmountingscrewthroughthecoilandpoletip.Besuretheinternaltoothlockwasherisonthescrew
headside.Thescrewheadshouldbeonthesideofthesearchcoilwherethecablecomesout.
3. Installthethumbnutonthescrewandtightenbyhand.
4. Theknurledlocknutisinstalledontheupperstemtoprotectthethreadsduringhandlingandshipment.Removethe
locknutandslideitontothelowerstemasshown.Besurethelockringisinsidethelocknutorbehindit,sothatitwill
bepushedintothelocknutwhenthelocknutisreinstalledonthethreads.
5. Insertthelowerstemintotheupperstem,pushthelocknutuptoengagethethreads,andtightenitfingertight.
6. Windthesearchcoilcablearoundthepole,andinstallthesearchcoilconnectorintotheconnectoronthefrontofthe
chassis.Tightentheconnectorfingertight.
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looseningtheknurledlocknutandextendingorcollapsingthestemlengthuntiltheunit
canbeheldaboutaninchoffthegroundwhilestandingerect.Adjusttheangleofthesearchcoil,sothatthecoilisparallelto
theground.Tightenthesearchcoilthumbnutandstemlocknutbyhandtomaintainthissetting.
CONTROLS
ThefunctionofthefrontpanelcontrolsoftheDeepSearchVIareasfollows,beginninginthelowerlefthandcorner,and
proceedinginaclockwisedirection.
1. ModeSwitch.Thisswitchisathreepositiontoggleswitchwhichselectsthebasicdetectoroperationmode.
A. BatteryTest.Thispositionisusedtochecktheconditionofthebatteries.Thebatterytestshouldbeperformedafterthedetectorhas
beenonforabout10minutes,andwithamoderatetoheavyamountofsound.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.
B. Norm.ThispositionselectsNormalorAllMetalmode.IntheNormalposition,thedetectorcanbeadjustedtoignoreground
mineralizationformaximumdepth,butthedetectorwillnotdiscriminateagainstunwantedmetalssuchasiron,bottlecaps,etc.
C. Disc.ThispositionselectstheDiscriminatemodeofoperation,wherebyresponsetounwantedmetalobjectssuchasiron,bottlecaps,
thinfoilpieces,etc.,canbecontrolled.Groundmineralizationwillaffecttheoperationofthedetectorinthismode. 
2. Disc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other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anegativeor"nulling"response. 
3. Tuning.Thiscontrolisusedtotunethedetectortoitsmostsensitivesetting,regardlessofwhichmodeisused.
SincethetargetresponseofaTRdetectorisanincreaseinsoundlevel,theidealsettingformaximumdepthissothat
thedetectorisjustbeginningtomakesound.This"threshold"settingshouldbemaintainedatalltimes,asoperatingthe
detectorcompletelysilentmeansadeeptargetmayhaveinsufficientresponsetodrivethedetectoroutofthequietregion
andinto"threshold".
4. Sensitivity.Thiscontroladjuststhedetector'ssensitivitytogroundeffectsduetomineralization,aswellasits
sensitivitytometallictargets.Inthenormalmodeofoperation,thedetectorwillignoreeffectsofmineralizationifitis
properlyadjusted,sothedetectorcanbeoperatedinmaximumsensitivityinalmostanygroundinthemode.Inthe
discriminatemode,thegroundeffectsarenotignored,sothedetectormayperformbetterinheavilymineralizedgroundat
reducedsensitivity.
5. GroundAdjust.Thiscontrolisusedtoadjustthedetectorsothatitdoesnotrespondtothemineralizationinthe
ground,whenusedinnormalmode.
6. ON/OFFVolume.Thiscontroladjuststheamplitudeoftheaudiosignal,aswellascontrollingthepowertotheunit.
Whenusingtheinternalspeaker,thevolumecontrolshouldbeatitsmaximumclockwisesettingformaximumdepth.
Whenusingheadphones,theinternalspeakerisdisconnected,andthevolumecontrolshouldbesetformaximum
comfortablevolume.
7. TuningPushButtonSwitch.Thisswitchislocatedintheendofthehandgripwhereitiseasilydepressedwiththe
thumb.Thisswitchisusedtoresetthedetectortuningtothedesiredthresholdanytimeconditionscauseatuning
changeinthedetector.
TUNING
A. NormalModeTuning.
1. TurnON/OFFVolumecontrolfullyclockwise.
2. TurntheGroundAdjustcontroltoabout6.Setthesensitivitycontroltomid range(pointerstraightup). 
3. HoldtheTuningpushbuttonswitchin.
4. TurnTuningcontrolasrequiredtogetamoderateaudiosoundandameterreadingofabout.4.
5. Holdthecoilabout2feetabovetheground,andreleasethepushbutton.
6. Lowerthesearchcoiltowithinaninchoftheground,andobservemeterreadingchangeandaudiochangeasthecoilislowered. 
7. Ifthemeterreadingandthesoundincrease,turntheGroundAdjustcontroldownslightly(counterclockwise).Ifthemeterreadingand
thesounddecrease,turntheGroundAdjustcontrolupslightly(clockwise).
8. Raisethecoilbacktoabouttwofeetabovetheground,andmomentarilydepresstheTUNINGswitchtore establishthetuningthreshold.
9. Repeatsteps6,7,&8asrequired,untilthereisalmostnochangeinthemeterreadingandthesoundasthecoilisloweredtothe
ground.NOTE: Thegroundmustbefreeofallmetallicitemswherethecoilislowered.IftheGroundAdjustcontrolisturnedcompletely
counterclockwiseandthedetectorstillgiveanincreaseasthecoilislowered,atargetisunderthecoil.Movetoanotherspotandrepeatthe
tuningprocedure.
10. PushtheTuningpushbutton,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Tuning.
1. TheDeepSearchVIwillgivebestoperationintheDiscriminateModeiftheGroundAdjustcontrolisproperlyadjustedasoutlinedin
theNormalModeTuning,soperformthisprocedurefirst.
2. PuttheModeSwitchintheDISCposition.AdjusttheDiscLevelcontroltoprovidethedesiredlevelofdiscrimination.
3. Holdthesearchcoilabout1to2inchesabovetheground.MomentarilydepresstheTuningpushbuttonswitchtoestablishthetuning
threshold.
4. Raiseandlowerthesearchcoilslightly,andnotethetuningchanges.Ifaslightupwardmovementcausesafullscalemeterdeflection
andmaximumaudio,thegroundisheavilymineralized,andmayrequirealowersensitivitysetting.Ifthedetectorcantolerateanupward
movementofseveralinchesbeforepeggingthemeterandaudio,thegroundislightlymineralizedandtheSensitivityknobcanprobablybe
adjustedhigher.
5. AdjusttheSensitivitycontroltothehighestsettingthatwillallowyoutosweepthedetectorfromsidetosideandstillmaintainthe
threshold.AttemptingtooperatethedetectorinDiscriminateModeatmaximumsensitivityinheavilymineralizedgroundwillalmostalways
resultinalossofperformance.
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.TheDeepSearchVIdoesnotneedtobehurried,sogoatapacethatdoesn'twearyouout.
Keepthedetectortunedsothatitisjustbeginningtobuzz.InNormalModethedetectorignorestheground,ifproperly
adjusted,sothisiseasytodo.InDiscriminate,thegroundwillaffectthedetector,soyoushouldsweepthedetectorata
constantheightabovetheground(about1inch).Irregularitiesintheground,aswellasinyoursweepheightwillcause
variationsinthetuning.Thesechangeswillusuallybemuchslowerthantheabruptsignalcausedbythecoilpassingovera
goodtarget.Alittlepracticewithacoinburiedabout1inchwillenableyoutopickoutthetargetsoundreadily,ascompared
tothebackgroundvariations.TurningtheSensitivitydownwillmakeiteasiertomaintainthreshold.Alwaysoperatein
DiscriminatewiththeSensitivitycontrolsetonlyashighaswillallowyoutooperateintheunitatthreshold.
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.
Topinpointorlocateatargetwhichdoesn'tpegthemeterandaudio,simplymovethecoilaroundtofindthepointwhere
theloudestaudioandhighestmeterreadingisgiven.Thetargetwillberightbelowthecenterofthecoil.Ifthetargetresponse
issostrongitpegsthemeterandaudio,simplypushthetuningbuttonmomentarilyoverthestrongestsignal.Thiswilltune
outmostoftheresponsetothetargetandthedetectorwillgototallyquietifitismovedawayfromthetarget.Itmaybe
necessarytoretuneacoupleoftimestoalmosttotallytuneoutthetarget,butyouwilleventuallyarriveatatuninglevelthat
willnotsaturateorpegthemeterandaudiowhenyouaredirectlyoverthetarget.
IntheDiscriminateMode,thetuningwillhavetoberesetanytimethattheDiscLevelischanged.Thismerelyrequires
thatyoumomentarilydepressthepushbuttontuningswitch.Bybeingfamiliarwithyourdetectorandwheretypicaljunkitems
arerejectedcansaveyoumuchneedlessdigging.
Onethingtoremember,though,isthatinDiscriminateMode,itisbestnottouseanyhigherDiscriminateLevelsetting
thannecessary.NickelsandmostsmallringsarerejectedwhentheDISCLEVELissettorejectpulltabsonallTR
Discriminators.Ifyoudon'tdiganyjunkatall,youaresurelypassingupalotofothergoodfindstoo.SettheDISCLEVEL
onlyhighenoughtosuittheconditionswhereyouaresearching.
Atlowersettingsofsensitivity,thedetectorcanusuallybeswitchedfromNormalModetoDiscriminateModeorvice
versawithoutaffectingthetuning.AtmaximumsensitivitysomesmalleffectmaybeencounteredwhenswitchingfromNormal
toDiscriminate,soifthethresholdsounddoesgoawayorgetstooloudwhenswitchingModes,simplydepresstheTuning
Buttonmomentarily.
Forrelichuntingorforcoinshootinginareasthatarefreeoftrash,theNormalModeofoperationwillnormallygivebest
results,sincethedetectoriseasytousewithmaximumsensitivity.Itmaybedesirabletooperatewithreducedsensitivityin
theNormalModeattimes,however.Forexample,topreventhavingtodiglarge,deepholesinawellkeptparklawn.
BATTERYREPLACEMENT
TheDeepSearchVIisequippedwithaninternalbatterycheck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forcetheaudioon,simplyholdthe
searchcoilnearalargemetalobjectwhilecheckingthebatteries,ordepressthetuningbuttonandturntheTuningcontrolfully
clockwise.
Ifthemeterreadslessthan.6,thebatteriesshouldbereplacedtoensurebestperformance.
Tochangethebatteries,depressthechromebuttonsoneachsideofthedetector,andslidethebatterycoveroffthe
backofthechassis.Thebatteriesarecontainedinaplasticholderjustbehindthecover.
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ineachbatterycompartmentofthebatterypack.
Replacethepackintotheholder,andreplacethebatterycoverbydepressingthechromebuttonsasthecoverisslid
backintothechassis.
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,orfromenteringtheupperstem,whereit
coulddamagethepushbuttonorleakintothechassis.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.
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DeepSearchVI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.
The7"coplanarsearchcoilfurnishedwiththeDeepSearchVIisoptimizedforcoinhunting,butwillworkaswellasmost
8"coilsforrelichunting.Theseriousrelichunterwillprobablywanttoconsiderthelargerwidescancoilsavailableforthe
DEEPSEARCHVI.Theyofferincreaseddepthforrelics,butatasacrificeinthediscriminationability.
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DeepSearchVI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.
TesoroElectronics,Inc.715WhiteSparRoadPrescott,AZ,USA863031928 7712646
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DeepSearchVIOPERATORINSTRUCTIONMANUAL
GENERALDESCRIPTION
TheDeepSearchVI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designoftheDeepSearchVIwasimplementednotonlytoprovideexcellentsensitivity,buttoprovideaunitwhichis
easytouseforboththebeginnerandtheexperttreasurehunter.
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DeepSearchVI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installthelowerstemandlocknutassemblytotheupperstem.
1. 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.
2. Insertthecoilmountingscrewthroughthecoilandpoletip.Besuretheinternaltoothlockwasherisonthescrew
headside.Thescrewheadshouldbeonthesideofthesearchcoilwherethecablecomesout.
3. Installthethumbnutonthescrewandtightenbyhand.
4. Theknurledlocknutisinstalledontheupperstemtoprotectthethreadsduringhandlingandshipment.Removethe
locknutandslideitontothelowerstemasshown.Besurethelockringisinsidethelocknutorbehindit,sothatitwill
bepushedintothelocknutwhenthelocknutisreinstalledonthethreads.
5. Insertthelowerstemintotheupperstem,pushthelocknutuptoengagethethreads,andtightenitfingertight.
6. Windthesearchcoilcablearoundthepole,andinstallthesearchcoilconnectorintotheconnectoronthefrontofthe
chassis.Tightentheconnectorfingertight.
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looseningtheknurledlocknutandextendingorcollapsingthestemlengthuntiltheunit
canbeheldaboutaninchoffthegroundwhilestandingerect.Adjusttheangleofthesearchcoil,sothatthecoilisparallelto
theground.Tightenthesearchcoilthumbnutandstemlocknutbyhandtomaintainthissetting.
CONTROLS
ThefunctionofthefrontpanelcontrolsoftheDeepSearchVIareasfollows,beginninginthelowerlefthandcorner,and
proceedinginaclockwisedirection.
1. ModeSwitch.Thisswitchisathreepositiontoggleswitchwhichselectsthebasicdetectoroperationmode.
A. BatteryTest.Thispositionisusedtochecktheconditionofthebatteries.Thebatterytestshouldbeperformedafterthedetectorhas
beenonforabout10minutes,andwithamoderatetoheavyamountofsound.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.
B. Norm.ThispositionselectsNormalorAllMetalmode.IntheNormalposition,thedetectorcanbeadjustedtoignoreground
mineralizationformaximumdepth,butthedetectorwillnotdiscriminateagainstunwantedmetalssuchasiron,bottlecaps,etc.
C. Disc.ThispositionselectstheDiscriminatemodeofoperation,wherebyresponsetounwantedmetalobjectssuchasiron,bottlecaps,
thinfoilpieces,etc.,canbecontrolled.Groundmineralizationwillaffecttheoperationofthedetectorinthismode. 
2. Disc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other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anegativeor"nulling"response. 
3. Tuning.Thiscontrolisusedtotunethedetectortoitsmostsensitivesetting,regardlessofwhichmodeisused.
SincethetargetresponseofaTRdetectorisanincreaseinsoundlevel,theidealsettingformaximumdepthissothat
thedetectorisjustbeginningtomakesound.This"threshold"settingshouldbemaintainedatalltimes,asoperatingthe
detectorcompletelysilentmeansadeeptargetmayhaveinsufficientresponsetodrivethedetectoroutofthequietregion
andinto"threshold".
4. Sensitivity.Thiscontroladjuststhedetector'ssensitivitytogroundeffectsduetomineralization,aswellasits
sensitivitytometallictargets.Inthenormalmodeofoperation,thedetectorwillignoreeffectsofmineralizationifitis
properlyadjusted,sothedetectorcanbeoperatedinmaximumsensitivityinalmostanygroundinthemode.Inthe
discriminatemode,thegroundeffectsarenotignored,sothedetectormayperformbetterinheavilymineralizedgroundat
reducedsensitivity.
5. GroundAdjust.Thiscontrolisusedtoadjustthedetectorsothatitdoesnotrespondtothemineralizationinthe
ground,whenusedinnormalmode.
6. ON/OFFVolume.Thiscontroladjuststheamplitudeoftheaudiosignal,aswellascontrollingthepowertotheunit.
Whenusingtheinternalspeaker,thevolumecontrolshouldbeatitsmaximumclockwisesettingformaximumdepth.
Whenusingheadphones,theinternalspeakerisdisconnected,andthevolumecontrolshouldbesetformaximum
comfortablevolume.
7. TuningPushButtonSwitch.Thisswitchislocatedintheendofthehandgripwhereitiseasilydepressedwiththe
thumb.Thisswitchisusedtoresetthedetectortuningtothedesiredthresholdanytimeconditionscauseatuning
changeinthedetector.
TUNING
A. NormalModeTuning.
1. TurnON/OFFVolumecontrolfullyclockwise.
2. TurntheGroundAdjustcontroltoabout6.Setthesensitivitycontroltomid range(pointerstraightup). 
3. HoldtheTuningpushbuttonswitchin.
4. TurnTuningcontrolasrequiredtogetamoderateaudiosoundandameterreadingofabout.4.
5. Holdthecoilabout2feetabovetheground,andreleasethepushbutton.
6. Lowerthesearchcoiltowithinaninchoftheground,andobservemeterreadingchangeandaudiochangeasthecoilislowered. 
7. Ifthemeterreadingandthesoundincrease,turntheGroundAdjustcontroldownslightly(counterclockwise).Ifthemeterreadingand
thesounddecrease,turntheGroundAdjustcontrolupslightly(clockwise).
8. Raisethecoilbacktoabouttwofeetabovetheground,andmomentarilydepresstheTUNINGswitchtore establishthetuningthreshold.
9. Repeatsteps6,7,&8asrequired,untilthereisalmostnochangeinthemeterreadingandthesoundasthecoilisloweredtothe
ground.NOTE: Thegroundmustbefreeofallmetallicitemswherethecoilislowered.IftheGroundAdjustcontrolisturnedcompletely
counterclockwiseandthedetectorstillgiveanincreaseasthecoilislowered,atargetisunderthecoil.Movetoanotherspotandrepeatthe
tuningprocedure.
10. PushtheTuningpushbutton,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Tuning.
1. TheDeepSearchVIwillgivebestoperationintheDiscriminateModeiftheGroundAdjustcontrolisproperlyadjustedasoutlinedin
theNormalModeTuning,soperformthisprocedurefirst.
2. PuttheModeSwitchintheDISCposition.AdjusttheDiscLevelcontroltoprovidethedesiredlevelofdiscrimination.
3. Holdthesearchcoilabout1to2inchesabovetheground.MomentarilydepresstheTuningpushbuttonswitchtoestablishthetuning
threshold.
4. Raiseandlowerthesearchcoilslightly,andnotethetuningchanges.Ifaslightupwardmovementcausesafullscalemeterdeflection
andmaximumaudio,thegroundisheavilymineralized,andmayrequirealowersensitivitysetting.Ifthedetectorcantolerateanupward
movementofseveralinchesbeforepeggingthemeterandaudio,thegroundislightlymineralizedandtheSensitivityknobcanprobablybe
adjustedhigher.
5. AdjusttheSensitivitycontroltothehighestsettingthatwillallowyoutosweepthedetectorfromsidetosideandstillmaintainthe
threshold.AttemptingtooperatethedetectorinDiscriminateModeatmaximumsensitivityinheavilymineralizedgroundwillalmostalways
resultinalossofperformance.
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.TheDeepSearchVIdoesnotneedtobehurried,sogoatapacethatdoesn'twearyouout.
Keepthedetectortunedsothatitisjustbeginningtobuzz.InNormalModethedetectorignorestheground,ifproperly
adjusted,sothisiseasytodo.InDiscriminate,thegroundwillaffectthedetector,soyoushouldsweepthedetectorata
constantheightabovetheground(about1inch).Irregularitiesintheground,aswellasinyoursweepheightwillcause
variationsinthetuning.Thesechangeswillusuallybemuchslowerthantheabruptsignalcausedbythecoilpassingovera
goodtarget.Alittlepracticewithacoinburiedabout1inchwillenableyoutopickoutthetargetsoundreadily,ascompared
tothebackgroundvariations.TurningtheSensitivitydownwillmakeiteasiertomaintainthreshold.Alwaysoperatein
DiscriminatewiththeSensitivitycontrolsetonlyashighaswillallowyoutooperateintheunitatthreshold.
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.
Topinpointorlocateatargetwhichdoesn'tpegthemeterandaudio,simplymovethecoilaroundtofindthepointwhere
theloudestaudioandhighestmeterreadingisgiven.Thetargetwillberightbelowthecenterofthecoil.Ifthetargetresponse
issostrongitpegsthemeterandaudio,simplypushthetuningbuttonmomentarilyoverthestrongestsignal.Thiswilltune
outmostoftheresponsetothetargetandthedetectorwillgototallyquietifitismovedawayfromthetarget.Itmaybe
necessarytoretuneacoupleoftimestoalmosttotallytuneoutthetarget,butyouwilleventuallyarriveatatuninglevelthat
willnotsaturateorpegthemeterandaudiowhenyouaredirectlyoverthetarget.
IntheDiscriminateMode,thetuningwillhavetoberesetanytimethattheDiscLevelischanged.Thismerelyrequires
thatyoumomentarilydepressthepushbuttontuningswitch.Bybeingfamiliarwithyourdetectorandwheretypicaljunkitems
arerejectedcansaveyoumuchneedlessdigging.
Onethingtoremember,though,isthatinDiscriminateMode,itisbestnottouseanyhigherDiscriminateLevelsetting
thannecessary.NickelsandmostsmallringsarerejectedwhentheDISCLEVELissettorejectpulltabsonallTR
Discriminators.Ifyoudon'tdiganyjunkatall,youaresurelypassingupalotofothergoodfindstoo.SettheDISCLEVEL
onlyhighenoughtosuittheconditionswhereyouaresearching.
Atlowersettingsofsensitivity,thedetectorcanusuallybeswitchedfromNormalModetoDiscriminateModeorvice
versawithoutaffectingthetuning.AtmaximumsensitivitysomesmalleffectmaybeencounteredwhenswitchingfromNormal
toDiscriminate,soifthethresholdsounddoesgoawayorgetstooloudwhenswitchingModes,simplydepresstheTuning
Buttonmomentarily.
Forrelichuntingorforcoinshootinginareasthatarefreeoftrash,theNormalModeofoperationwillnormallygivebest
results,sincethedetectoriseasytousewithmaximumsensitivity.Itmaybedesirabletooperatewithreducedsensitivityin
theNormalModeattimes,however.Forexample,topreventhavingtodiglarge,deepholesinawellkeptparklawn.
BATTERYREPLACEMENT
TheDeepSearchVIisequippedwithaninternalbatterycheck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forcetheaudioon,simplyholdthe
searchcoilnearalargemetalobjectwhilecheckingthebatteries,ordepressthetuningbuttonandturntheTuningcontrolfully
clockwise.
Ifthemeterreadslessthan.6,thebatteriesshouldbereplacedtoensurebestperformance.
Tochangethebatteries,depressthechromebuttonsoneachsideofthedetector,andslidethebatterycoveroffthe
backofthechassis.Thebatteriesarecontainedinaplasticholderjustbehindthecover.
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ineachbatterycompartmentofthebatterypack.
Replacethepackintotheholder,andreplacethebatterycoverbydepressingthechromebuttonsasthecoverisslid
backintothechassis.
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,orfromenteringtheupperstem,whereit
coulddamagethepushbuttonorleakintothechassis.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.
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DeepSearchVI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.
The7"coplanarsearchcoilfurnishedwiththeDeepSearchVIisoptimizedforcoinhunting,butwillworkaswellasmost
8"coilsforrelichunting.Theseriousrelichunterwillprobablywanttoconsiderthelargerwidescancoilsavailableforthe
DEEPSEARCHVI.Theyofferincreaseddepthforrelics,butatasacrificeinthediscriminationability.
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DeepSearchVI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.
TesoroElectronics,Inc.715WhiteSparRoadPrescott,AZ,USA863031928 7712646
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DeepSearchVIOPERATORINSTRUCTIONMANUAL
GENERALDESCRIPTION
TheDeepSearchVI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designoftheDeepSearchVIwasimplementednotonlytoprovideexcellentsensitivity,buttoprovideaunitwhichis
easytouseforboththebeginnerandtheexperttreasurehunter.
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DeepSearchVI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installthelowerstemandlocknutassemblytotheupperstem.
1. 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.
2. Insertthecoilmountingscrewthroughthecoilandpoletip.Besuretheinternaltoothlockwasherisonthescrew
headside.Thescrewheadshouldbeonthesideofthesearchcoilwherethecablecomesout.
3. Installthethumbnutonthescrewandtightenbyhand.
4. Theknurledlocknutisinstalledontheupperstemtoprotectthethreadsduringhandlingandshipment.Removethe
locknutandslideitontothelowerstemasshown.Besurethelockringisinsidethelocknutorbehindit,sothatitwill
bepushedintothelocknutwhenthelocknutisreinstalledonthethreads.
5. Insertthelowerstemintotheupperstem,pushthelocknutuptoengagethethreads,andtightenitfingertight.
6. Windthesearchcoilcablearoundthepole,andinstallthesearchcoilconnectorintotheconnectoronthefrontofthe
chassis.Tightentheconnectorfingertight.
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looseningtheknurledlocknutandextendingorcollapsingthestemlengthuntiltheunit
canbeheldaboutaninchoffthegroundwhilestandingerect.Adjusttheangleofthesearchcoil,sothatthecoilisparallelto
theground.Tightenthesearchcoilthumbnutandstemlocknutbyhandtomaintainthissetting.
CONTROLS
ThefunctionofthefrontpanelcontrolsoftheDeepSearchVIareasfollows,beginninginthelowerlefthandcorner,and
proceedinginaclockwisedirection.
1. ModeSwitch.Thisswitchisathreepositiontoggleswitchwhichselectsthebasicdetectoroperationmode.
A. BatteryTest.Thispositionisusedtochecktheconditionofthebatteries.Thebatterytestshouldbeperformedafterthedetectorhas
beenonforabout10minutes,andwithamoderatetoheavyamountofsound.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.
B. Norm.ThispositionselectsNormalorAllMetalmode.IntheNormalposition,thedetectorcanbeadjustedtoignoreground
mineralizationformaximumdepth,butthedetectorwillnotdiscriminateagainstunwantedmetalssuchasiron,bottlecaps,etc.
C. Disc.ThispositionselectstheDiscriminatemodeofoperation,wherebyresponsetounwantedmetalobjectssuchasiron,bottlecaps,
thinfoilpieces,etc.,canbecontrolled.Groundmineralizationwillaffecttheoperationofthedetectorinthismode. 
2. Disc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other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anegativeor"nulling"response. 
3. Tuning.Thiscontrolisusedtotunethedetectortoitsmostsensitivesetting,regardlessofwhichmodeisused.
SincethetargetresponseofaTRdetectorisanincreaseinsoundlevel,theidealsettingformaximumdepthissothat
thedetectorisjustbeginningtomakesound.This"threshold"settingshouldbemaintainedatalltimes,asoperatingthe
detectorcompletelysilentmeansadeeptargetmayhaveinsufficientresponsetodrivethedetectoroutofthequietregion
andinto"threshold".
4. Sensitivity.Thiscontroladjuststhedetector'ssensitivitytogroundeffectsduetomineralization,aswellasits
sensitivitytometallictargets.Inthenormalmodeofoperation,thedetectorwillignoreeffectsofmineralizationifitis
properlyadjusted,sothedetectorcanbeoperatedinmaximumsensitivityinalmostanygroundinthemode.Inthe
discriminatemode,thegroundeffectsarenotignored,sothedetectormayperformbetterinheavilymineralizedgroundat
reducedsensitivity.
5. GroundAdjust.Thiscontrolisusedtoadjustthedetectorsothatitdoesnotrespondtothemineralizationinthe
ground,whenusedinnormalmode.
6. ON/OFFVolume.Thiscontroladjuststheamplitudeoftheaudiosignal,aswellascontrollingthepowertotheunit.
Whenusingtheinternalspeaker,thevolumecontrolshouldbeatitsmaximumclockwisesettingformaximumdepth.
Whenusingheadphones,theinternalspeakerisdisconnected,andthevolumecontrolshouldbesetformaximum
comfortablevolume.
7. TuningPushButtonSwitch.Thisswitchislocatedintheendofthehandgripwhereitiseasilydepressedwiththe
thumb.Thisswitchisusedtoresetthedetectortuningtothedesiredthresholdanytimeconditionscauseatuning
changeinthedetector.
TUNING
A. NormalModeTuning.
1. TurnON/OFFVolumecontrolfullyclockwise.
2. TurntheGroundAdjustcontroltoabout6.Setthesensitivitycontroltomid range(pointerstraightup). 
3. HoldtheTuningpushbuttonswitchin.
4. TurnTuningcontrolasrequiredtogetamoderateaudiosoundandameterreadingofabout.4.
5. Holdthecoilabout2feetabovetheground,andreleasethepushbutton.
6. Lowerthesearchcoiltowithinaninchoftheground,andobservemeterreadingchangeandaudiochangeasthecoilislowered. 
7. Ifthemeterreadingandthesoundincrease,turntheGroundAdjustcontroldownslightly(counterclockwise).Ifthemeterreadingand
thesounddecrease,turntheGroundAdjustcontrolupslightly(clockwise).
8. Raisethecoilbacktoabouttwofeetabovetheground,andmomentarilydepresstheTUNINGswitchtore establishthetuningthreshold.
9. Repeatsteps6,7,&8asrequired,untilthereisalmostnochangeinthemeterreadingandthesoundasthecoilisloweredtothe
ground.NOTE: Thegroundmustbefreeofallmetallicitemswherethecoilislowered.IftheGroundAdjustcontrolisturnedcompletely
counterclockwiseandthedetectorstillgiveanincreaseasthecoilislowered,atargetisunderthecoil.Movetoanotherspotandrepeatthe
tuningprocedure.
10. PushtheTuningpushbutton,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Tuning.
1. TheDeepSearchVIwillgivebestoperationintheDiscriminateModeiftheGroundAdjustcontrolisproperlyadjustedasoutlinedin
theNormalModeTuning,soperformthisprocedurefirst.
2. PuttheModeSwitchintheDISCposition.AdjusttheDiscLevelcontroltoprovidethedesiredlevelofdiscrimination.
3. Holdthesearchcoilabout1to2inchesabovetheground.MomentarilydepresstheTuningpushbuttonswitchtoestablishthetuning
threshold.
4. Raiseandlowerthesearchcoilslightly,andnotethetuningchanges.Ifaslightupwardmovementcausesafullscalemeterdeflection
andmaximumaudio,thegroundisheavilymineralized,andmayrequirealowersensitivitysetting.Ifthedetectorcantolerateanupward
movementofseveralinchesbeforepeggingthemeterandaudio,thegroundislightlymineralizedandtheSensitivityknobcanprobablybe
adjustedhigher.
5. AdjusttheSensitivitycontroltothehighestsettingthatwillallowyoutosweepthedetectorfromsidetosideandstillmaintainthe
threshold.AttemptingtooperatethedetectorinDiscriminateModeatmaximumsensitivityinheavilymineralizedgroundwillalmostalways
resultinalossofperformance.
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.TheDeepSearchVIdoesnotneedtobehurried,sogoatapacethatdoesn'twearyouout.
Keepthedetectortunedsothatitisjustbeginningtobuzz.InNormalModethedetectorignorestheground,ifproperly
adjusted,sothisiseasytodo.InDiscriminate,thegroundwillaffectthedetector,soyoushouldsweepthedetectorata
constantheightabovetheground(about1inch).Irregularitiesintheground,aswellasinyoursweepheightwillcause
variationsinthetuning.Thesechangeswillusuallybemuchslowerthantheabruptsignalcausedbythecoilpassingovera
goodtarget.Alittlepracticewithacoinburiedabout1inchwillenableyoutopickoutthetargetsoundreadily,ascompared
tothebackgroundvariations.TurningtheSensitivitydownwillmakeiteasiertomaintainthreshold.Alwaysoperatein
DiscriminatewiththeSensitivitycontrolsetonlyashighaswillallowyoutooperateintheunitatthreshold.
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.
Topinpointorlocateatargetwhichdoesn'tpegthemeterandaudio,simplymovethecoilaroundtofindthepointwhere
theloudestaudioandhighestmeterreadingisgiven.Thetargetwillberightbelowthecenterofthecoil.Ifthetargetresponse
issostrongitpegsthemeterandaudio,simplypushthetuningbuttonmomentarilyoverthestrongestsignal.Thiswilltune
outmostoftheresponsetothetargetandthedetectorwillgototallyquietifitismovedawayfromthetarget.Itmaybe
necessarytoretuneacoupleoftimestoalmosttotallytuneoutthetarget,butyouwilleventuallyarriveatatuninglevelthat
willnotsaturateorpegthemeterandaudiowhenyouaredirectlyoverthetarget.
IntheDiscriminateMode,thetuningwillhavetoberesetanytimethattheDiscLevelischanged.Thismerelyrequires
thatyoumomentarilydepressthepushbuttontuningswitch.Bybeingfamiliarwithyourdetectorandwheretypicaljunkitems
arerejectedcansaveyoumuchneedlessdigging.
Onethingtoremember,though,isthatinDiscriminateMode,itisbestnottouseanyhigherDiscriminateLevelsetting
thannecessary.NickelsandmostsmallringsarerejectedwhentheDISCLEVELissettorejectpulltabsonallTR
Discriminators.Ifyoudon'tdiganyjunkatall,youaresurelypassingupalotofothergoodfindstoo.SettheDISCLEVEL
onlyhighenoughtosuittheconditionswhereyouaresearching.
Atlowersettingsofsensitivity,thedetectorcanusuallybeswitchedfromNormalModetoDiscriminateModeorvice
versawithoutaffectingthetuning.AtmaximumsensitivitysomesmalleffectmaybeencounteredwhenswitchingfromNormal
toDiscriminate,soifthethresholdsounddoesgoawayorgetstooloudwhenswitchingModes,simplydepresstheTuning
Buttonmomentarily.
Forrelichuntingorforcoinshootinginareasthatarefreeoftrash,theNormalModeofoperationwillnormallygivebest
results,sincethedetectoriseasytousewithmaximumsensitivity.Itmaybedesirabletooperatewithreducedsensitivityin
theNormalModeattimes,however.Forexample,topreventhavingtodiglarge,deepholesinawellkeptparklawn.
BATTERYREPLACEMENT
TheDeepSearchVIisequippedwithaninternalbatterycheck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forcetheaudioon,simplyholdthe
searchcoilnearalargemetalobjectwhilecheckingthebatteries,ordepressthetuningbuttonandturntheTuningcontrolfully
clockwise.
Ifthemeterreadslessthan.6,thebatteriesshouldbereplacedtoensurebestperformance.
Tochangethebatteries,depressthechromebuttonsoneachsideofthedetector,andslidethebatterycoveroffthe
backofthechassis.Thebatteriesarecontainedinaplasticholderjustbehindthecover.
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ineachbatterycompartmentofthebatterypack.
Replacethepackintotheholder,andreplacethebatterycoverbydepressingthechromebuttonsasthecoverisslid
backintothechassis.
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,orfromenteringtheupperstem,whereit
coulddamagethepushbuttonorleakintothechassis.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.
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DeepSearchVI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.
The7"coplanarsearchcoilfurnishedwiththeDeepSearchVIisoptimizedforcoinhunting,butwillworkaswellasmost
8"coilsforrelichunting.Theseriousrelichunterwillprobablywanttoconsiderthelargerwidescancoilsavailableforthe
DEEPSEARCHVI.Theyofferincreaseddepthforrelics,butatasacrificeinthediscriminationability.
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DeepSearchVI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.
TesoroElectronics,Inc.715WhiteSparRoadPrescott,AZ,USA863031928 7712646
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