User`s guide
74 | Dexcom G4 PLATINUM Continuous Glucose Monitoring System
7
Only use blood glucose values between 40-400 mg/dL for calibration. If
the blood glucose value you enter is outside of this range, the receiver
will not calibrate. You must wait until your blood glucose is in this range
to calibrate.
These steps show you how to enter your blood glucose values for
calibration:
PRECAUTION
To calibrate the system, enter the exact blood glucose
value that your blood glucose meter displays within
5 minutes of a carefully performed blood glucose
measurement. Entering incorrect blood glucose values or
blood glucose values from more than 5 minutes before
entry might affect sensor performance, and you might
miss a low or high blood glucose value.
PRECAUTION
Do not calibrate if your blood glucose is changing at a
signicantrate,typicallymorethan2mg/dLperminute.
Do not calibrate when your receiver screen is showing
the rising single arrow or double arrow, which indicates
that your blood glucose is rising 2-3 mg/dL/min or more
than 3 mg/dL/min. Also, do not calibrate when your
receiver screen is showing the falling single arrow or
double arrow, which indicates that your blood glucose
is falling 2-3 mg/dL/min or more than 3 mg/dL/min.
Calibratingduringsignicantriseorfallofbloodglucose
may affect accuracy of sensor glucose readings.