optris BR 20AR, Operator'S Manual

Page: 19 / 28

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Installation 19
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The
“Fever Inspection with Ref” layout consists of two measuring
areas. The first measuring area is the so-called "reference
source", which must be placed on the BR 20AR radiator. It is
important to cover a large area as possible, but not the edges
(see
Figure 11 ). The minimum size should be at least 8x8 pixels.
The second measuring area ("Remove eyewear") must be
positioned so that the human face is captured. The emissivity of
the "reference source" does not have to be taken into account
further, as the ambient temperature is equal to the reference
source temperature. This can remain set at ε=1. The emissivity
of the object (here the human skin) should be set at ε=0.98.
Figure 11: Position of Reference
source
The window Temp. of measure area displays the current
maximum temperature value. As soon as this reaches the alarm
value, the color changes to red. This ensures that the alarm case
is clearly visible. In this case the threshold value is set to 36 °C.
The threshold value of the alarm must be adjusted for different
conditions.
Figure 12: Temp. of eeasure area