Therm-App MD User Manual
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Page 19 of 23
8 FAQ and Troubleshooting
1) Does the camera work on other operating systems (iOS, Windows)? Therm-App is designed
exclusively to work on Android OS and Linux.
2) How do I get my hands on the Software Developer’s Kit for this? We are happy to provide the
SDK for you. Contact your account manager to request the SDK agreement. Once signed we will
provide you with the SDK.
3) Why is the temperature on the screen much lower than the average human temperature?
Thermal imaging processes an image based on the energy emitted from objects in the field of
view. This will include a person, hot air from a heater, a computer or a cool gust of wind from an
air conditioner. Unlike a thermometer – which measures absolute temperature – a thermal
imager will show the temperature in relative terms. As in – what is my temperature relative to
the person next to me. To do this we need to establish the baseline temperature, either with a
black body, or by using three healthy individuals as described in the setup instructions. Once
we’ve established that baseline, the temperature gradient can be measured very accurately.
4) Why does the temperature change when a person stands at different ranges camera? Since the
camera is aggregating all the energy it is receiving in the field of view, the temperature reading
will change. The optimal range for a 6.8-millimeter lens on the camera is 2 meters. It can be used
effectively up to 5 meters, but it’s important to make sure the temperature of a person is
measured at the exact distance that the baseline was established. If your setup is designed to read
temperatures of people at three meters, for example, make sure that it was calibrated during the
setup for people at that range.
5) Why can’t I hear the alert? Make sure the monitor you are using has speakers and that the alert
sound is enabled in the app. The sound is transmitted to the monitor through the HDMI cable.
6) Why does my ThermApp crash when I turn it on? Check that the SBC resolution setting matches
your monitor resolution. If not, adjust accordingly.
7) Why after some time does the temperature of the same individuals change? Although the
camera’s steady state takes about 40 minutes, it may take another hour or so to truly reach a
point where the temperature stops shifting. After an hour, it is recommended to check the
temperature and recalibrate the threshold accordingly. Also, since the ambient temperature
changes during the day, it is recommended to repeat the process once every eight hours.
8) Can the ThermApp be used outside? Yes. But you need to adjust the ambient temperature in
accordance with the outside temperature as it will probably not be 25 degrees, and you may need
to recalibrate the ambient temperature and the baseline as the day progresses and temperatures
change. Also, avoid a field of view which is looking at a street in which vehicles (which are hot
objects) could pass through it.
9) I’m not getting a temperature reading and the screen says “overflow”. This occurs if an object
in the screen surpasses 60°c (140°F), which is beyond our calibration range. Remove the object
and check again. If this error still occurs, reinstall the Therm-App app from an APK provided to
you by your account manager.
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