How to calibrate electronic sphygmomanometer with mercury sphygmomanometer?

How to use desktop mercury sphygmomanometer

Put it on the table first, put it flat, open the lid, take out the cuff, tilt the sphygmomanometer 45 to the right, so that the mercury is lower than 0 scale, and let people sit on the bench, so that the sphygmomanometer is consistent with the human heart and arms (most importantly). Put the person's arms and palms up on the table, tie the cuff of the sphygmomanometer 2-3 cm above the elbow joint, and then inflate it until it hits 140- 160 mm Hg. Listen carefully, the first sound is systolic pressure, and the second is diastolic pressure. If you are not at ease, you can test it again every 15 minutes. When you play, if your blood pressure is too high, you can play higher. Similarly, people with low blood pressure can play lower. After the measurement, the gas in the repair bag must be exhausted, then put back into the sphygmomanometer, tilt the sphygmomanometer 45 to the right and turn off the mercury column switch to prevent mercury from leaking out.

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