What to do if the blood oxygen saturation measurement of the Redmi Watch 5 Lite is abnormal?

To solve the problem, please refer to the following details:
1. Factors such as hair, tattoos, shaking, low temperature, and incorrect wearing will affect the measurement results, and even lead to value failure. Wear the device tightly to the distance from one finger of the wrist bone, and keep it stationary throughout the measurement, which can greatly improve the successful rate of the measurement;
2. In order to ensure the accuracy of the measurement, please wear the watch correctly, keep the arm flat, keep the watch screen upward, and the watch and wrist skin are comfortably attached. Do not wear it on the wrist joint, and then start the blood oxygen saturation measurement on the watch. Keep the arm stationary throughout the measurement;
3. Ensure that the sensor on the back of the watch is clean and dry, and there is no foreign objects occlusion;
4. In a low-temperature environment (such as high altitude, winter and other low-temperature scenes), you can remove the watch and rub the sensor of the watch actively with the skin to increase blood circulation, therefore improving the measurement;
5. In order to make the measurement result more accurate, it is recommended that you wear it for 3 to 5 minutes before measuring the blood oxygen saturation.