How To Calibrate - Dexcom G4 User Manual

4
HELPFUL HINTS:
• Do not use alternative blood glucose site testing (blood from your palm or
forearm, etc.) for calibration as alternate site blood glucose values may
be different than those obtained from a fingerstick blood glucose value.
Use a blood glucose value obtained only from a blood glucose meter for
calibration.
• In order to obtain accurate sensor glucose readings proper calibration is
required using accurate blood glucose values.
4.2

HOW TO CALIBRATE

For calibration, you must enter the exact blood glucose value from your meter.
Blood glucose values must be between 2.2-22.2 mmol/L and must have been
taken within the past 5 minutes.
Entering incorrect blood glucose values, or blood glucose values
that occurred more than 5 minutes ago may cause inaccurate
sensor glucose readings.
HELPFUL HINT:
• Only blood glucose values between 2.2-22.2 mmol/L can be used for
calibration. If the blood glucose value(s) you entered was outside of this
range, the receiver will not calibrate. You will have to wait until your blood
glucose is in this range to calibrate.
The steps below show you how to enter your blood glucose values for
calibration:
1. Take a blood glucose measurement using your meter.
2. From any trend graph, press the
3. Use the Up or DOWN
highlight "Enter BG."
4. Press the SELECT
You will see a screen with a blood drop and a
number in mmol/L units.
50 | Dexcom G4 Continuous Glucose Monitoring System
SELECT
button to scroll until you
button to choose this option.
button to display the main menu.