User`s guide
Dexcom G4 PLATINUM User’s Guide | 73
WARNING
Calibrate at least once every 12 hours. Calibrating less
often than every 12 hours might cause sensor glucose
readings to be inaccurate, and you might miss a low or
high blood glucose value.
7.4 12-HOUR CALIBRATION UPDATE
Calibrateyoursystematleastevery12hoursafteryourrstcalibration
(2-hour startup calibration) to make sure your sensor glucose readings
remain accurate and close to your blood glucose meter values. You can
enter blood glucose values earlier than 12 hours if you want. If you have
not entered any blood glucose values in the past 12 hours, the receiver
will ask you to enter a blood glucose value to update its calibration.
The following steps show you how to enter this calibration.
1. When you see this screen, press the
SELECT button to clear it.
a. The blood drop symbol will stay at the top
of the trend graph until you calibrate.
b. The system will re-alert every 15 minutes
until you enter the blood glucose values.
2. Take 1 blood glucose measurement with your
meter, and enter the blood glucose value into the receiver. If this
screen reappears soon, see Chapter 13, Section 13.2, Calibration
Troubleshooting.
7.5 OTHER REASONS YOU MAY NEED TO
CALIBRATE
You may need to calibrate when your system did not accept the last
calibration or your blood glucose value is very different from the sensor
glucose reading.
Calibration prompt