RayTek 54301 26MID

Installation

5.4.3AmbientBackgroundTemperatureCompensation

Thesensoriscapableofimprovingtheaccuracyoftarget

temperaturemeasurementsbytakingintoaccounttheambientor

backgroundtemperature.Thisfeatureisusefulwhenthetarget

emissivityisbelow1.0andthebackgroundtemperatureis

significantlyhotterthanthetargettemperature.Forinstance,the

highertemperatureofafurnacewallcouldleadtohotter

temperaturesbeingmeasuredespeciallyforlowemissivitytargets.

Ambientbackgroundtemperaturecompensationcompensatesforthe

impactofthereflectedradiationinaccordancetothereflective

behaviorofthetarget.Duetothesurfacestructureofthetarget,some

amountofambientradiationwillbereflectedandthereforeaddedto

thethermalradiationthatiscollectedbythesensor.Theambient

backgroundtemperaturecompensationcompensatesthefinalresult

bysubtractingtheamountofambientradiationmeasuredfromthe

sumofthermalradiationthesensorisexposedto.

Theambientbackgroundtemperaturecompensation

shouldalwaysbeactivatedincaseoflowemissivity

targetsmeasuredinhotenvironmentsorwhenheat

sourcesarenearthetarget!

Threepossibilitiesforambientbackgroundtemperature

compensationareavailable:

• Theinternalsensorheadtemperatureisutilizedfor

compensationassumingthattheambientbackground

temperatureismoreorlessrepresentedbytheinternalsensor

headtemperature.Thisisthedefaultsetting.

• Ifthebackgroundambienttemperatureisknownandconstant,

theusermaygivetheknownambienttemperatureasaconstant

temperaturevalue.

26MID