Freestyle Libre 2 Manual Del Usuario página 74

What it means
The Signal Loss Alarm notifies you if your Sensor has not communicated with the
Reader for 20 minutes and you are not receiving Low or High Glucose Alarms.
Signal loss could be caused by the Sensor being too far away from the Reader
(over 20 feet) or another issue such as an error or problem with your Sensor or
Reader.
Touch No to dismiss the alarm.
Touch Yes or press the Home Button to dismiss the alarm and scan the Sensor.
Note:
If you ignore an alarm, you will receive it again in 5 minutes if the condition
still exists.
If you receive an alarm while the Reader is connected to a computer, you must
first unplug the Reader to scan the Sensor.
App Alarms
FreeStyle Libre 2 App includes several types of alarms.
Optional Glucose Alarms: Low Glucose and High Glucose alarms are turned
ART46983-001_rev-A 24-Aug-2022 2:30pm