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  3. MedSense TF01 Infrared Forehead Thermometer

Error message "Err" on thermometer and shuts down on its own

The thermometer will display the "Err" message if the environment temperature changed too rapidly at more than 5°C during object temperature mode. It will then shut down automatically.

To resolve this issue, allow the thermometer 30 minutes to equilibrate with room temperature before use.