Dexcom G5 MOBILE User Manual page 109

Why Is Calibrating Important?
Calibrations are a must. They align your Dexcom G5 Mobile readings with your BG meter,
improving its accuracy and helping it perform at its best.
By calibrating when the system notifies you that a calibration is due, the Dexcom G5 uses
your meter's BG value to make sure the sensor glucose readings remain accurate throughout
your session.
How Do I Calibrate?
Take a fingerstick measurement from your BG meter, and simply enter the meter's BG value
into your display device.
When taking a fingerstick, it's important to do it correctly. Make sure you wash and dry your
hands right before. And remember; always use your finger, never another site.
This chapter lets you know what precautions you need to take before taking your BG meter
value, then entering your data. Up to now, you needed to enter information such as Alerts,
transmitter SN, etc., separately for the receiver and smart device. Calibration is different.
Do not enter your BG values into both devices: only enter your BG value into your app OR your
receiver. If you enter your meter's BG value into your receiver, it takes about five minutes
for your sensor glucose readings to begin. In approximately ten minutes, you can view the
readings in the other display device.
How Often Do I Calibrate?
There are three primary "must do" calibration events, each with its own prompts:
1. Two initial calibrations once your warmup session is complete.
2. Update calibrations done twice daily, once every 12 hours.
3. When you're prompted.
If you receive a calibration prompt outside of your scheduled calibration schedule, either the
system doesn't accept your most recent calibration or your meter's BG value is very different
from the sensor's glucose reading.
Don't worry about keeping track of the time between calibrations; the system will prompt you
when you are ready for another.
Dexcom G5 Mobile System User Guide
Calibration
107