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.
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