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
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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.

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.

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”)

Copyright©2014FLIRSystems,Inc.
Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform
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