Dexcom G6 User Manual page 96

For everything except calibration (such as alarm/alerts), you must enter information
into both the receiver and smart device. Calibrating is different. Don't enter your
BG values into both devices; only enter your meter value into either the app or the
receiver. When you enter your meter value into one display device, it takes about 5
minutes to show on your other display device.
How Often Do I Calibrate?
If you entered the sensor code during set-up, there's no need to calibrate. You can
calibrate if you want, but the system doesn't require it.
If you didn't enter a sensor code during setup, you must calibrate your G6. After sensor
warmup, you're prompted to calibrate twice. Then you start getting your G6 readings.
You'll be prompted to calibrate 12 hours later, and again 12 hours after that. For the
rest of your 10-day sensor session, you're prompted to calibrate once every 24 hours.
WARNING
Don't Wait – Calibrate!
If you have not used the calibration code, you must manually calibrate your G6
using values obtained from a blood glucose meter and fingersticks daily. You must
calibrate immediately when the G6 notifies you. If you haven't calibrated when
notified, your G6 may not be accurate, so use your glucose meter to make treatment
decisions until you calibrate your G6.
Follow G6 instructions. If you don't, you could miss a severe low or high glucose event.
If you receive a calibration notification outside of your scheduled calibrations, the
system didn't accept your most recent calibration or your meter value is very different
from your G6 reading.
Dexcom G6 ® System User Guide
Chapter 7: Calibrate
94