How to resolve calibration errors on a Withings smart blood pressure cuff

**How to Resolve Calibration Errors on a Withings Smart Blood Pressure Cuff**

**Quick Fix:** To instantly clear a calibration error on your Withings cuff, press and hold the power button for 3 seconds until the setup screen appears, then re-pair the device to the Withings app to automatically trigger a sensor recalibration.

If the calibration error persists, walk through these targeted troubleshooting steps to restore your cuff’s internal pressure sensors:

* **Execute a Hardware Factory Reset:**
* Press and hold the cuff’s main button for 15 seconds until the screen displays the gear icon or “Factory Reset.”
* Go to your smartphone’s Bluetooth settings, find your Withings cuff, and select **Forget this Device**.
* Open the Withings app, remove the cuff from your devices list, and then select **Install a Device** to reconnect it and push fresh, calibrated firmware to the unit.

* **Ensure Proper Voltage for the Pressure Sensor:**
* Insufficient power prevents the internal sensors from baseline calibrating, resulting in “Err 5” or “Err 6” readouts.
* If you have a rechargeable model (like the BPM Connect or BPM Core), plug it into a wall outlet for at least 2 hours to ensure a full charge.
* If you have a battery-powered model, replace all batteries with brand-new, matching alkaline batteries (do not mix old and new batteries).

* **Correct the Physical Cuff Alignment:**
* Incorrect physical placement tricks the sensor into reading uneven pressure, which triggers calibration faults.
* Wrap the cuff around your bare left arm with the metal tube aligned directly over your main brachial artery (facing the inside of your arm).
* Tighten the cuff so that it is snug but allows you to slip exactly two fingertips under the top edge; a loose cuff prevents the internal bladder from calibrating its zero-point pressure.

* **Establish a Zero-Vibration Calibration Baseline:**
* The Withings cuff calibrates its sensors during the first five seconds of inflation.
* Sit quietly in a chair with back support for 5 minutes before starting the measurement.
* Rest your left arm on a flat table at exact heart level, keep your legs uncrossed, and remain completely silent and motionless while the cuff inflates.