Extech Instruments IR255 User manual

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USERGUIDE

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MiniInfraRedThermometer

WithLaserPointerandHigh‐LowAlarms

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ModelIR255

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EXTECHINSTRUMENTS

2IR255‐en‐EU_V1.49/14

Introduction

CongratulationsonyourpurchaseoftheIR255IRThermometer.Thisthermometermakesnon‐

contact(infrared)temperaturemeasurementsatthetouchofabutton.Thebuilt‐inlaserpointer

increasestargetaccuracywhilethebacklitLCDandhandypush‐buttonscombineforconvenient,

ergonomicoperation.Thisdevice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.

Features

Measuresnon‐contactsurfacetemperatureupto400°C(752°F)

12:1DistancetoSpotRatio(FieldofView)

Single‐pointlasertargeting

AutomaticDataHoldwhentriggerisreleased

DisplayBacklight

Maximum‐Minimumtemperaturefunction

Selectabletemperatureunits(°C/°F)

Dynamicbatterystatusindication

Adjustableemissivity

AudibleandvisiblealarmindicationforHighandLowTemperatureAlarm

Safety

InternationalSafetySymbols

Thissymbol,adjacenttoanothersymbolorterminal,indicatestheusermustrefertothemanualfor

furtherinformation

Warnings

oDonotdirectlyorindirectlypointthelaserattheeyesofapersonorananimal

oInspectfordamageorforanyshortageofpartsoraccessoriesbeforeuse

oReplacethebatteryimmediatelyafterthebatteryindicatorflashes

oDonotusethethermometernearexplosivegases,steam,ordust

oNotethatanobjectwithhighreflectivitywillnormallycausethemeasuredtemperaturevaluetoread

muchlowerthantheactualtemperature

oUsethedeviceonlyasdescribedinthisUserGuide

Cautions

Toavoidthermometerdamage,pleaseavoidthefollowinghazards:

oEMFfromweldingequipmentorelectro‐inductionheaters

oStaticelectricity

oThermalshockcausedbylargeorabruptenvironmentaltemperaturechanges;wait30minutesto

allowthethermometertostabilizetonewenvironmentalconditions

oDonotusethisdeviceinexcessivelyhightemperatureenvironments

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EXTECHINSTRUMENTS

3IR255‐en‐EU_V1.49/14

Description

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MeterDescription

1. LCDDisplay

2. SETButton

3. MAX‐MIN/DownArrowButton

4. Laserpointerlens

5. IRThermometerlens

6. Backlight‐LaserPointer/UpArrowButton

7. MeasurementScanTrigger

8. BatteryCompartment

DisplayDescription

Emissivityvalueindication

Laserpointeractiveicon

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Scanmode(activewhilethetriggerispulled;displayed

temperaturetracksthetemperatureofthescannedsurfaces)

Holdmode(displayedtemperaturefreezeswithtriggerrelease)

Maximum/Minimumtemperatureicons

Batterycapacityindicator(flasheswhenbatteryvoltageiscritical)

DisplayBacklighticon

Temperatureunits(°F/°C)

TemperatureAlarmiconsandaudiblealarmdisableicon

EXTECHINSTRUMENTS

4IR255‐en‐EU_V1.49/14

Operation

MeterPower

Themeterispoweredbyone9Vbattery.Withafreshbatteryinstalled,themeterswitchesON

whenthetriggerispulled.Thebatteryislocatedinthemeterhandle;pullthebattery

compartmentlidawayfromthebodyofthemetertoopen.RefertotheMaintenancesection

formoreBatteryInstallationinstructions.Thebatteryiconprovidesbatterystatusindication.

Replacethe9Vbatteryassoonasthebatterystatusiconflashes.

SurfaceTemperatureMeasurements

1. HoldthemeterbyitsHandleGripandpointittowardthesurfacetobemeasured.Readthe

FieldofViewsectionbelowfordistancetotarget(spot)ratioinformation.

2. PullandholdtheTriggertoturnthemeteronandbegintestinginScanmode.Thedisplay

willlightifthe9Vbatteryisgood.Replacethebatteryifthedisplaydoesnotlight.

3. WhilecontinuingtopulltheTrigger:

a. PushthebuttontoswitchthelaserpointerON.WhenthelaserisON,thelaser

icon willappearontheLCD.Aimtheredlaserbeamapproximatelyahalfinchbelow

thepointoftest(pressingtheLaserbuttonagainturnsthelaseroff).

b. Selectthetemperatureunits(oC/oF)intheSettingsMode(seelatersection).

c. PushthebuttontoswitchONtheLCDbacklightingfunction.

4. ReleasetheTrigger;thereadingwillholdforapproximately9seconds,afterwhichthemeter

willautomaticallyshutoff.

5. Themeterdefaultstotheprogrammedconditionsinusewhenthemeterwaslastswitched

OFF.Forexample,ifthelaserissettoONandthetemperatureunitsaresettooFatthetime

theunitisswitchedOFF,theunitwillswitchONandusethesamesettings.

Over‐rangeIndicators(OLand‐OL)

Ifthetemperaturemeasurementexceeds400°C(752°F),thethermometerwilldisplayOLin

placeofatemperaturereading.Ifthetemperaturemeasurementisbelow‐20°C(‐4°F),the

thermometerwilldisplay‐OLinplaceofatemperaturereading.

MAX‐MINMode

PresstheMAX‐MINbuttontoviewthemaximumtemperaturereading(MAX),pressagainto

viewthelowestreading(MIN).PressagaintoswitchtheMAX‐MINmodeoff.

DisplayBacklight

Pressthebacklightbutton toswitchthebacklightON.Thebacklightwillswitch

OFFautomaticallyafterseveralsecondstoconservebatterypower.

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EXTECHINSTRUMENTS

5IR255‐en‐EU_V1.49/14

SettingMode

PresstheSETbuttontoaccesstheSettingMode.Usetheupanddownbuttonstonavigatethe

SettingModemenuandtomakechanges.Theavailableparametersarelistedbelow:

Emissivitysetting

°C/°Ftemperatureunitsselection

TemperatureAlarmAudibleBeeperEnable/Disable

HighTemperatureAlarmLimitsetting

LowTemperatureAlarmLimitsetting

Thecorrespondingparametericonwillflashwhenselected.ToexittheSettingMode,press

andholdtheSETbuttonfortwoseconds.

EmissivitySetting

Theiconwillflashwhenselected.Usetheupanddownbuttonstoincreaseordecreasethe

emissivity(in0.01steps).Theemissivityrangeis0.10to1.00.Holddowntheupordown

buttontorapidlyincreaseordecreasetheemissivityvalue.PresstheSETbuttontoconfirm

andtosteptothenextoption.

SelectingtheTemperatureUnitofMeasure(°C/°F)

Usetheupanddownbuttonstoselect°Cor°F.PresstheSETbuttontoconfirmandtostepto

thenextoption.

Enable/DisableAudibleTemperatureAlarm

Thisparameterisusedtoenable/disabletheaudibletemperaturealarm.The iconwillflash

inthismode.

Usetheupanddownbuttonstotogglethesetting.Whentheaudiblealarmisdisabled,the

displaywillshow‘HIGHLOW’.Whentheaudiblealarmisenabled,thedisplaywillshow

.Whentheaudiblealarmisenabled,thebeeperisallowedtosoundwhenever

themeasuredtemperaturegoesbeyondthehighorlowtemperaturelimitvalues.Pressthe

SETbuttontoconfirmandtosteptothenextoption.

HIGHTemperatureAlarmLimitSetting

UsetheupanddownbuttonstoincreaseordecreasetheHighAlarmTemperatureLimit(in

0.1steps).HoldingdowntheupordownbuttonwillrapidlyincreaseordecreasetheHIGH

limitvalue.AbeepwillsoundiftheHIGHtemperaturevaluereachestheLOWtemperature

valuewhileprogramming.PresstheSETbuttontoconfirmandtosteptothenextoption.

LOWTemperatureAlarmLimitSetting

UsetheupandownbuttonstoincreaseordecreasetheLowAlarmTemperatureLimit(in0.1

steps).HoldingdowntheupordownbuttonwillrapidlyincreaseordecreasetheLOWlimit

value.AbeepwillsoundiftheLOWtemperaturevaluereachestheHIGHtemperaturevalue

whileprogramming.PresstheSETbuttontoconfirmandtosteptothenextoption.

EXTECHINSTRUMENTS

6IR255‐en‐EU_V1.49/14

LocatingHotorColdSpots

Todetectahotorcoldspot,aimthethermometerataregionbeyondthetargetandthenscan

theentireregioninaslow,up/downmotion.

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DistancetoSpotRatio(FieldofView)

Themeter’sfieldofviewis12:1(distancetospotratio).Forexample,ifthemeteris600mm

fromthetarget(spot),thediameterofthetargetmustbeatleast50mm.Otherdistancesare

shownbelowinthefieldofviewdiagram.

Notethatmeasurementsshouldnormallybemadecloserthan1200mmfromthetarget.The

metercanmeasurefromfurtherdistancesbutthemeasurementmaybeaffectedbyexternal

sourcesoflight.Inaddition,thespotsizemaybesolargethatitencompassessurfaceareasnot

intendedtobemeasured.

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Itisnecessarytoensurethatthesizeofthetargetislargerthanthespotsize.Thesmallerthe

target,thecloserthedistanceshouldbe.Seetheaccompanyingdiagram.

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Emissivity

Emissivityrepresentstheenergyreflectivityofamaterial.Mostorganicmaterialsandpainted

oroxidizedsurfaceshaveanemissivityofapproximately0.95.Ifpossible,maskingtapeorflat

blackpaintshouldbeappliedtocoverthemeasuredsurface.

Waitaperiodoftimetoallowthetapeorpainttoreachthermalequilibriumwiththesurface

ofthecoveredobject.Measurethetemperatureofthesurfacecoveredwithtapeorpaintonly

afterequilibriumhasbeenachieved.

EXTECHINSTRUMENTS

7IR255‐en‐EU_V1.49/14

MeasurementNotes

1. Theobjectundertestshouldbelargerthanthespot(target)sizecalculatedbythefieldof

viewdiagram.

2. Ifthesurfaceoftheobjectundertestiscoveredwithfrost,oil,grime,etc.,cleanbefore

takingmeasurements.

3. Ifanobject'ssurfaceishighlyreflectiveapplymaskingtapeorflatblackpainttothesurface

beforemeasuring.

4. Themetermaynotmakeaccuratemeasurementsthroughtransparentsurfacessuchas

glass.

5. Steam,dust,smoke,etc.canobscuremeasurements.

6. Themetercompensatesfordeviationsinambienttemperature.Itcan,however,takeupto

30minutesforthemetertoadjusttoextremelywideambienttemperaturechanges.

7. Tofindahotspot,aimthemeteroutsidetheareaofinterestthenscanacross(inanupand

downmotion)untilthehotspotislocated.

Maintenance

Cleaning

Tocleanthelensesusecompressedairtocleardustandotherparticles,thencarefullyclean

withawetcottonswab.Thecottonswabshouldbemoistenedwithcleanwater.

Tocleanthemeterhousing,wipewithadamp,softcloth.Donotusesolventsorabrasives.Do

notimmersetheIR255inwaterorotherliquid.

Troubleshooting

SymptomProblemAction

OLdisplayTargettemperatureexceedsrangeSelectatargetwithinrange

‐OLdisplayTargettemperatureunder‐rangeSelectatargetwithinrange

BatteryiconflashesLowBatterypowerReplaceBattery

BlankdisplayscreenLowbatterypowerCheckand/orreplacebattery

NoLaserpointerLowbatteryorenvironmental

temperaturehigherthan40°C(104°F)

Replacethebatteryormovethe

IR255toanareawithalower

ambienttemperature

EXTECHINSTRUMENTS

8IR255‐en‐EU_V1.49/14

ReplacingBatteries

Whenthebatteryiconflashes,orwhenthemeterdoesn’tswitchON,replacethebatteries.

Thebatterycompartmentislocatedinthehandlegrip.Thebatterycompartmentlidislocated

justbelowthetrigger.Prythecompartmentlidofftoreachthecompartment.

Replacethe9Vbatteryfollowingcorrectpolarityandthenclosethebatterycompartmentlid.

Batterysafetynotes:

oRemovethebatteryifthedeviceistobestoredforlongerthan60days

oNeverdisposeofbatteriesinafire.Batteriesmayexplodeorleak

oNevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype



Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.

Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate

collectionsites,theretailstorewherethebatterieswerepurchased,orwherever

batteriesaresold.

Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuseris

obligatedtotakeend‐of‐lifedevicestoadesignatedcollectionpointforthe

disposalofelectricalandelectronicequipment.



EXTECHINSTRUMENTS

9IR255‐en‐EU_V1.49/14

Specifications

InfraredThermometerSpecifications

Range/Resolution‐20to400oC(‐4to752oF)

Accuracy±2°C(3.6°F)or2%ofreading(whicheverisgreater)

Note:Accuracyisspecifiedforthefollowingambient

temperaturerange:21to25°C(70to77°F)

EmissivityAdjustablefrom0.10to1.00

FieldofViewD/S=Approx.12:1ratio(D=distance,S=spot)

LaserpowerLessthan1mW

Spectralresponse630to670nm(wavelength)

GeneralSpecifications

Display 1999count,backlitLCDdisplaywithfunctionindicators

Displayrate250msapprox.

OperatingTemperature 0°Cto40°C(32°Fto104°F)

OperatingHumidityMax.75%RH

PowerSupply9Vbattery

AutomaticPowerOffMetershutsoffautomaticallyafter9seconds

Weight 140g(4.0oz.)

Dimensions165x85x40mm(6.5x3.3x1.6”)



Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

www.extech.com

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