The cuff is not applied properly.
Apply the cuff correctly.
You moved your arm or body during measurement.
Make sure you remain very still and quiet during measurement.
The cuff position is not correct.
Sit comfortably and still. Place your arm on a table with your palm facing upward and the cuff at the same level as your heart.
If you have a very weak or irregular heartbeat, the device may have difficulty in determining your blood pressure.
Please contact Customer Support if you are still having issues after performing these steps.