How to Calibrate a Digital Thermometer is covered in the user manual.

I couldn't find the original recovery feature with iProvent.You can switch from C to F or F to C as you please.

There is a citation in the user manual.The document can be downloaded at the end of the article.

2.Please make sure that the device is used in a closed room with no strong breeze or draft.

3.Make sure that the ears and forehead are not covered for 5 minutes prior to the measurement to make them warmer.

4.To prevent the sensor from getting stained, make sure the forehead is dry and clean.

6.The accuracy of the reading can be affected by intense emotions and exertion.

7.It is recommended to wait at least 30 minutes for the thermometer to adjust to the new environment in order to get the most accurate reading.

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