How Often Do I Calibrate?; When To Calibrate - Dexcom G5 User Manual

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. You
only need to enter calibrations into one display device.
Don't enter your BG values into both devices: only enter into either the app or the 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.

7.4 When to Calibrate

Calibrating on a regular schedule aligns your sensor glucose readings with your meter's BG
values. Without calibrations, your sensor may be inaccurate, and as a result, so will your
display device's sensor glucose readings, Alerts, and prompts, etc.
There are important times when you must calibrate:
1. Initial or Startup Calibration: two hours after you insert your sensor.
2. 12-Hour Update Calibration: every 12 hours after two-hour startup calibration.
3. When system prompts you.
With calibration prompts, your sensor and display device help you keep your calibration
schedule on track. If your BG values are not between 40 and 400 mg/dL, the system won't
accept your calibration. Wait until you are within the 40-400 mg/dL range before entering
your BG values.
Dexcom G5 Mobile System User Guide
Calibration
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