Dexcom G4 User Manual page 147

Important alerts and alarms that can be verified by the user:
• Out of Range Alert - You can test this alert by moving the receiver more than
6 meters away for 30 minutes or more.
• 30-minute sensor expiration alert - You will see this alert in the normal
course of using a sensor for seven days.
• 0-hour sensor expiration alert - You will see this alert in the normal course
of using a sensor for seven days.
Other alerts and alarms cannot be safely verified by the user.
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