This screen means this measurement is invalid.
Possible reasons for measurement errors include:
- Measurement distance is greater than 3cm (1.18in).
Caution, do not keep the button pressed while approaching the thermometer from a distance of less than 3 cm. Place the thermometer at a distance from the forehead of less than 3 cm THEN press the button.
- Environment temperature does not meet measurement requirements or there is an excessively high-temperature difference.
- Temperature: 15°C-40°C (59°F-104°F)
- Humidity: 15-85%RH
- Atmospheric pressure: 70~106kPa