E1
Omron Blood Pressure Monitor
Severity: MinorWhat Does This Error Mean?
E1 means the cuff could not detect your pulse — usually because you moved during the measurement. Sit still, relax your arm, and try again.
Affected Models
- Omron M2
- Omron M3
- Omron M6
- Omron M7 Intelli IT
- Omron HEM-7120
- Omron HEM-7156
Common Causes
- Movement or talking during measurement
- Cuff applied too loosely
- Arm position incorrect (cuff should be at heart level)
- Irregular heartbeat (arrhythmia)
- Cuff tube not properly connected
How to Fix It
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Sit quietly for 5 minutes before measuring.
Avoid caffeine, exercise, and smoking for at least 30 minutes before.
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Sit upright with your feet flat on the floor.
Rest your arm on a flat surface with your palm facing up. The cuff should be at the same height as your heart.
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Apply the cuff correctly — snug but not tight.
The tube should run down the inside of your arm. The bottom edge of the cuff should be 1–2 cm above your elbow.
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Do not move or speak during the measurement.
Stay completely still until the reading appears.
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Check that the cuff tube is fully plugged in.
A loose tube connection prevents the cuff from inflating properly.
Frequently Asked Questions
Is E1 dangerous?
No — E1 is a measurement error, not a health alert. It just means the monitor could not complete the reading. Try again following the steps above.
My Omron always shows E1 — what's wrong?
If E1 happens every time, check that you are using the correct cuff size for your arm. Omron sells different cuff sizes (S, M, L). An undersized cuff on a larger arm will always struggle to detect a pulse.