User manual

Installation
26 MI
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.