optris BR 20AR, Operator'S Manual

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Fever Detection 25
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4.4 Deployment of an IR camera for best results
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Use a camera with a spatial resolution of 382 x 288 pixels or better and with a NETD of 80 mK or
better.
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Select the right optics using the Optris calculator. Check the Field of View (FOV) and Measurement
Field of View (MFOV) which defines the smallest spot size that can be measured accurately.
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Set the emissivity for temperature measurement on human tissue to 0.98.
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Setting the temperature span for maximum contrast on face temperatures (typically from 23 °C to
40 °C) and applying color isotherms to highlight the hottest temperature on the human face makes it
easy to see a subject with temperatures outside a normal range.

The span and isotherm settings are depending on ambient temperature variations, so optimal setting
is important. For differential thermography technique, measure tear duct temperatures of test subjects
and set alarms for 1...2 °C above that average temperature making sure to adjust if ambient
temperatures change.
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The PIX Connect software can be set to alarm audibly when a temperature inside the area tool exceeds
a customer set threshold. This can be combined with automatic snapshots. Customers should set their
own alarm threshold based on their degree of sensitivity to false negatives and positives and advice
of medical professionals.
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Use the pre-defined layouts that are provided with PIX Connect software for either crowd based or
individual screening. The layouts can easily be adapted for local needs if necessary.