1.Press the User Select Button to choose User 1 or User 2.
OR 
After the user number is selected, press the START/STOP button to confirm the chosen user.
2.With the cuff wrapped around your arm, press the START/STOP button. Do not inflate the cuff unless it is wrapped around your arm. All digits will light up to check the display functions. The checking procedure will be completed after about 2 seconds.
3.After all symbols disappear, the display will show a blinking “0”. The monitor is “Ready to Measure” and will automatically inflate the cuff to start measurement.
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