User manual

EXTECHINSTRUMENTS
8IR300UV‐en‐GB_V1.01/16
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.
HighLowLimits
TheHI/LOlimitsprovideanalarmwhenapresettemperatureisexceeded.
LensCover
Thelenscoverprotectsthelensfromdustwhenthemeterisnotinuse.Alwaysclosethecover
whenstoringthemeter.
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.
8. Whenthemeterisheldattheoptimumdistancefromthetarget,
thesinglelaserdotwill
appearatthetopofthecircularlasertarget.Aslongasthesinglelaserdotiswithinthe
circularlasertarget,themeterwillmakeanaccuratemeasurement.