1.Ensure that the battery is charged. Non battery issues should be caused by circuit board faults or dirty objects inside the screen. It is recommended to return to the factory for testing.

The undervoltage symbol on the screen does not indicate low battery level. The battery symbol flashing or constantly increasing pressure indicates low battery level.

The secondary pressurization machine is normal, mainly due to the user's high blood pressure. It is necessary to apply secondary pressurization to the ideal value in order to accurately measure blood pressure.

It is recommended that customers take measurements three times a day, within 1 hour of waking up in the morning, between 2-4 pm in the afternoon, and 1 hour before bedtime in the evening.

Blood pressure changes constantly and is influenced by multiple factors such as the body and measurement method. To ensure emotional stability and adequate sleep during measurement, the three principles of timing, positioning, and posture should be followed. It is recommended to measure the average of three times.

Check whether the battery is installed correctly and whether the battery buckle is loose. If there are no such problems, it should be an internal chip failure. It is recommended to return to the factory for testing.

Follow the three principles of fixed-point, timed, and fixed posture, and measure with your left hand after 10 minutes without making any mistakes; The correct comparison method is to use the three-way method to compare with a mercury sphygmomanometer.

From the perspective of human anatomy, the thickness and diameter of the arterial blood vessels in the upper arm are almost the same as those in the wrist. The diameter of the arterial vessels in the upper arm is 4.2mm-6.0mm, and the diameter of the arterial vessels in the wrist is 4.2mm-5.0mm. In terms of the design accuracy and manufacturing accuracy of the instrument, the inspection specifications at the factory are also consistent, so there is no significant error in principle. The problem of posture errors during measurement is often the cause of large errors. Studies have shown that when measuring at a position higher than the height of the heart, for every 10cm increase in blood pressure, the value decreases by about 8mmHg, and for every 10cm decrease in blood pressure, the value increases by about 8mmHg. Secondly, the elasticity of the armband and the posture of the human body during measurement can both affect the measurement results. The wrist style is relatively lightweight compared to the upper arm style, suitable for carrying, and convenient for daily blood pressure management. Friendly reminder: It is suggested that the middle-aged and elderly, diabetes, perennial hypertension, and people with poor peripheral circulation system should not use wrist type, and try to choose upper arm type.