The Philips Wrist blood pressure monitor has 2 user profiles. During pairing it will automatically assign an unused profile to you. For each measurement the blood pressure monitor will automatically link the measurement to the comparable profile, when the device is connected with the Philips HealthSuite health app.
If there is no connection between the blood pressure monitor and the app, it will automatically select the previous user. To change the user profile, press the user ID button and select a different user. Make sure the correct user is selected before measurement, so the data will be properly transmitted and stored.