Omron HEM-7530T-E3 Instruction Manual page 48

BP reading display /
Problem
appears
appears
The pulse rate is not detected correctly.
appears
does not flash during
a measurement.
The monitor has malfunctioned.
appears
Possible Cause
11. Error Messages and Troubleshooting
Solution
Apply the arm cuff correctly, then take another measurement.
Refer to sub-section 3.1.
Remain still and sit correctly during a measurement.
Press the BP [START/STOP] button again. If "Er" still appears,
contact your OMRON retail outlet or distributor.
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