Extech Instruments DT500 Manuale utente

UserGuide

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LaserDistanceFinder

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ExtechDT500

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DT500-en-GB_v1.5 7/16

Introduction

CongratulationsonyourpurchaseoftheExtechModelDT500LaserDistanceFinder.Thismeter

measuresDistanceupto70m(230’)andcalculatesAreaandVolume.Inaddition,theDT500

includesalaserpointerforaccuratetargeting.Thismeterisshippedfullytestedandcalibrated

and,withproperuse,willprovideyearsofreliableservice.Pleasevisitourwebsite

(www.extech.com)tocheckforthelatestversionofthisUserGuide,ProductUpdates,and

CustomerSupport.

SafetyInstructions

Thismeterhasbeendesignedforsafeuse,butmustbeoperatedwithcaution.

WARNING:Donotdirectlyviewordirectthelaserpointerataneye.Lowpowervisiblelasers

donotnormallypresentahazard,butmaypresentsomepotentialforhazardifviewed

directlyforextendedperiodsoftime.

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Laserclassification(Class2)

TheDT500producesavisibleClass2laserbeamfromthetopofthe

instrument.Donotstareintothelaserbeamordirectthebeamtoward

anyone’seyes.Eyeprotectionisnormallyanautomaticresponse(‘blink

reflex’,forexample).

Warning:Donotlookdirectlyintothelaserbeamusingopticalaidssuch

asbinocularsortelescopes.Thiscancreateahazard.



PermittedUses

MeasureDistances

ComputeAreaandVolume



ProhibitedUses

Exceedingthespecifiedmeasurementlimits

Compromisingordeactivatingthesafetysystemsbuiltintothemeter

Removalofhazardorexplanatorylabelsaffixedtothemeter

Modifyingorconvertingtheinstrument

Usingthirdpartyaccessories

Operationonscaffoldingorladderswithoutpropersafetyprecautions

Measuringnearmachinesthatareoperatingornearpartsofmachineinstallationsthat

areunprotected

Aimingthemeterintothesunlight

Outdoormeasurementsormeasurementsonroads,nearconstructionsites,etc.without

adequatesafeguards

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DT500-en-GB_v1.5 7/16

Descriptions

FrontPanel

1. LCDdisplayarea

2. Keypad

3. Level

4. Measurebutton

5. LaserPointer

6. SensorTestingBeam





RearPanel 

1. Laserwarninglabel

2. Batterycompartmentlatch

3. Batterycompartment

4. Positioningbracket

5. Tripodmount

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DT500-en-GB_v1.5 7/16

DisplayDescription

1. LaserContinuousmodeisactive

2. Referencelevel‐front

3. Referencelevel‐rear

4. Referencelevel‐tripod

5. Referencelevel–endpiece

6. Area/Volumemeasurementfunctions

7. Variableindirectmeasurementfunctions:

SinglePythagoreanmeasurement

DoublePythagoreanmeasurement

DoublePythagorean(PartialHeight)

Tiltmeasurement

8. Stake‐outfunction

9. Batterystatus

10. Singledistancemeasurement

11. ContinuousmeasurementandMAX/MIN

12. InstrumentErrormessage

13. Memory

14. Bluetoothicon

15. Time

16. Tilt

17. DisplayLine1

18. DisplayLine2

19. DisplayLine3

20. DisplayLine4(Summaryline)



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DT500-en-GB_v1.5 7/16

KeypadDescription

Bluetooth/TimerButton

PowerON/MeasureButton/Laseron‐off

Tilt/Stake‐outButton



Area‐VolumeButton

MAX‐MINSingle/ContinuousMeasurementButton

IndirectMeasurementButton



AddButton

 MemoryStore‐RecallButton

Subtractbutton



MeasurementReferenceButton

CLEAR/PowerOFFButton

Backlight/UnitButton

 

Note:Ameasurementbuttonisalsolocatedontherightsideoftheinstrument

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DT500-en-GB_v1.5 7/16

OperatingInstructions

MeasurementConsiderations

1. Forbestresults,chooseatargetthatisflat,hardandsmooth

2. Useasectionofcardboardorsimilarmaterialifthetargetsizeneedstobeincreased

3. Replacethebatteryifthebatteryiconflashesonthedisplay

4. Themeterwillnotmeasurethroughglass,liquid,orStyrofoam

5. Inaccuratemeasurementsmayresultfromanyofthefollowing:

Lowbattery

Measureddistanceexceedingspecifiedrange

Irregularshapedobjectsnearthetarget

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PreparationforMeasurements

1. PresstheMEASbutton toswitchthemeterON.TheunitautomaticallyswitchesOFF

afterthree(3)minutesofinactivity.PressandholdtheCLRbuttontoswitchtheunitOFF

manually.

2. PresstheCLRbuttontocancelthelastactionperformedorclearthelastdatadisplayedon

thescreen.

3. PressCLRandMeasurebuttonsimultaneouslywhileinStoragemodetoclearallofthedata

storedinmemory.

4. PressandholdtheUNITbutton tochangetheunitofmeasure(ft=feet,in=inches,m=

meters,and‘“(feetandinches).

5. PressUnitbuttonquicklytoturnthebacklightonoroff.

6. UsethereferencebuttontoselecttheToporBottomdistancereference.

IntheTopmode(2),thedisplayedreadingwillrepresentthedistancefromthetopofthe

metertothetarget.

IntheBottommode(1),thedisplayedreadingwillrepresentthedistancefromthe

bottomofthemetertothetarget.Thisisthedefaultmode.

FormeasuringfromaTripod,corneroredge,refertotheTripodandPositioningBracket

sections.

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DT500-en-GB_v1.5 7/16

SingleDistanceMeasurement

1. MomentarilypresstheMEASbuttontoswitchthemeterON;Dashes(‐‐‐)willappearonthe

displayandtheLaserpointerwillswitchON.

2. AimthemeterandmomentarilypresstheMEASbuttontotakeanddisplayareading.The

LaserpointerswitchesOFFafterthemeasurementistaken.

3. Thereadingwillremainonthedisplay.

ContinuousDistanceMeasurement

1. PresstheMEASbuttontoswitchthemeterON.

2. PressandHoldtheMEASbuttonfor3secondstobeginacontinuousmeasurementsession.

Themeterwillbeepandthecontinuouslaserdisplayiconwillappear(asshowninthe

DisplayDescriptionsectionofthisguide).

3. EachsubsequentpressoftheMEASbuttontakesanewdistancemeasurement.

4. SwitchtheContinuousmodeON/OFFbypressingandholdingtheMEASbuttonfor3

seconds.

MAX‐MINContinuousMeasurement‘Tracking’Mode 

Thismodeofoperationisusefulfordeterminingtheshortestandlongestdistancesfromagiven

point.Themetercanbemovedtovarioustargetswhilethedisplayupdateseveryhalfsecondon

thethirddisplayline.TheMINandMAXvaluesaredisplayeddynamicallyonthefirstandsecond

displaylines.

1. PresstheMEASbuttontoswitchthemeterON.

2. PressandHoldtheMAX/MINbuttonfor3secondstobeginacontinuousmeasurement

session.Themeterwillbeep,thelaserpointerwillstayincontinuousmode,andthe

continuouslaserdisplayiconwillappear(asshownintheDisplayDescriptionsectionofthis

guide).

3. Themeterwillbeepwitheachnewmeasurementupdate(approx.everyonehalfsecond).

4. TheMINreadingwillbeindicatedandwillupdateeachtimealowerreading(lowerthan

thecurrentlydisplayed

reading)isencountered.

5. TheMAXreadingwillbe

indicatedandwillupdate

eachtimeahigherreadingis

encountered.

6. Theactualreadingwillbe

indicatedonthebottom

displayline.

7. Toexitthismodeofoperation,momentarilypresstheMEASbutton.

8. Notethatthemeterexitstothenormalmodeofoperationafterapprox.100

measurementsincontinuousmode. 

DT500-en-GB_v1.5 7/16

Adding/SubtractingMeasurements

Thesumordifferenceoftwomeasurementscanbedisplayed.

1. PresstheMEASbuttontoswitchthemeterON.

2. PresstheMEASbuttontotakethefirstreading.

3. Presstheplussign(+)orminussign(‐)buttonasdesired.Theplusorminussignwillappear

flashing.

4. PresstheMEASbuttontotakethesecondreading.

5. Readthesumordifferenceofthetworeadingsondisplayline4.

6. PressCLRtocancelthelaststep.

7. PressMAX/MINtoreturntosingledistancemeasurement.

AreaCalculation

TheDT500allowstheusertocomputetheareaofaroom.

1. PresstheMEASbuttontoturnthemeterON;waitseveralsecondsandtheLaserpointerwillswitchON.

2. Pressthe buttonfirmlyonce.

3. Aparallelogramwillappearwithitslengthsideflashing indicatingthataLength

measurementistobetaken.

4. AimthemeterandpressMEAStotaketheroomlengthmeasurement.

5. PresstheMEASagaintoswitchtheLaserPointerbackON.

6. TheparallelogramwillnowappearwithitsWidthsideflashing

indicatingthataWidthmeasurementistobetaken.

7. PressMEAStotaketheroomwidthmeasurement.

8. Lines1,2,and4willnowshowtheLength,Width,andArea(inft2orm2)respectively.

Notethatthelaserpointerwillswitchoffautomaticallyiftoomuchtimeistakenbetweenthe

stepsabove.Ifthisoccurs,simplypresstheMEASbuttontoswitchtheLaserpointerbackON

andthencontinuefollowingthesteps.

VolumeCalculation

TheDT500allowstheusertocomputeroomVolume.

1. PresstheMEASbuttontoswitchthemeterON.WaitseveralsecondsandtheLaserpointer

willautomaticallyswitchON.

2. Pressthebuttonfirmlytwice(allowasecondorsobetweenpresses).

3. AcubeshapewillappearwithitsLengthsideflashingindicatingthataLength

measurementistobetaken.

4. PressMEAStotaketheroomLengthmeasurement.

5. Thecube’sWidthsidewillnowbeflashingindicatingthataWidthmeasurementisto

betaken.

6. PressMEAStoswitchtheLaserpointerONagain.

7. PressMEASagaintotaketheroomWidthmeasurement.

DT500-en-GB_v1.5 7/16

8. Thecube’sHeightsidewillnowbeflashingindicatingthataHeightmeasurementistobe

taken.

9. PressMEAStoswitchtheLaserpointerONagain.

10. PressMEAStotaketheroomHeightmeasurement.

11. Lines1,2,and3willnowshowtheLength,Width,andHeightrespectively.Line4will

displaytheVolumeincubicfeetormeters(ft3orm3).

IndirectMeasurements(UsingTwoMeasurements)

TheDT500canmeasuretheverticalheightfromPoint1toPoint2withtheoperatortakingthe

measurementfromPointX.Thisisaccomplishedusingtwomeasurements.



1. PresstheMEASbuttontoswitchthemeterON.

2. Pressthebuttononce.WaitseveralsecondsandtheLaserpointerwillautomatically

switchON.

3. Arighttriangleshapewillappearwithitsdiagonallineflashing.

4. FromexactlyPointX,aimtheinstrumentatPoint1andpressMEAS.Onereadingisnow

completeandthebottomlineoftherighttrianglewillbeginflashing.

5. FromPointX,alignthemeterashorizontalaspossibleandaimforPoint2andthenpress

MEAS.ThelaserpointerwillswitchON.

6. PressMEASagaintotakethesecondmeasurement.

7. Thesecondmeasurementisnowcomplete.Thelowersummarydisplaylineindicatesthe

verticaldistancefromPoint1toPoint2.

DT500-en-GB_v1.5 7/16

IndirectMeasurements(UsingThreeMeasurements)

TheDT500canmeasureheightintwosegmentsbytakingthreemeasurements.Theoperator

standsatPointX.ThefirstmeasurementisPointXto1,thesecondmeasurementisahorizontal

linefromPointXto2,andthethirdmeasurementisfromPointXto3.



1. PresstheMEASbuttontoswitchthemeterON.WaitseveralsecondsandtheLaserpointer

willswitchON.

2. Pressthebuttontwotimes.

3. Thedoubletriangleicon willappearwithitsbottomdiagonallineflashing.

4. FromPointXaimtheinstrumentatPoint1andpressMEAS.Onereadingisnowcomplete

andthemiddlelineofthedoubletrianglewillbeginflashing.

5. PressMEASagaintoturnonthelaserpointertoprepareforthenextmeasurement.

6. FromPointX,aimtheinstrumenthorizontallyataPoint2andpressMEAS.Thesecond

readingisnowcompleteandthetopdiagonallineofthedoubletrianglewillbeginflashing.

7. PressMEAStoturnonthelaserpointerandprepareforthethirdmeasurement.

8. FromPointX,aimtheinstrumentatPoint3andpressMEAS.Thethirdmeasurementisnow

complete.

9. ThedistancefromPoint1toPoint3willnowbeindicatedonthebottomsummarydisplay

line.



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