Medtronic guardian Getting Started Manual - page 5
Understanding CGM | 3
C Alibr At ion
Your Guardian® REAL-Time System uses BG meter readings to make sure the glucose sensor
maintains its accuracy over time. This is called calibration.
To calibrate you must check your BG on your meter and enter the value into the Guardian
Monitor.
HoMe Screen > Main Menu > SenSor > enter Meter BG
When you calibrate is important.
• On day one of a new sensor a calibration is needed:
– approximately 2 hours after you connect the MiniLink® transmitter to your
sensor (the system will notify you)
– again within 6 hours
– again within 12 hours
• After day one, calibrate 3–4 times a day for optimal sensor accuracy
• A minimum of 1 calibration every 12 hours is required to receive sensor glucose readings
It’s easy to remember when to calibrate. Think before is best. The best times to calibrate are
when glucose levels are least likely to be changing rapidly, such as:
• Before meals
• Before insulin
• Before bedtime
• When there are no arrows on your monitor
Time your calibrations so you will not have to wake up in the middle of the night.
Remember, you can calibrate early! For example, if it’s 9pm and you know a calibration
will be required by 3am, go ahead and calibrate before bed. This will start the 12 hour
calibration clock over. To find out when your next calibration is due, press
ESC
3 times
from the HOME screen.
If you notice a large difference between your BG meter and sensor readings and
your glucose is stable, calibration may be needed to bring them together again
(remember, only calibrate if there are no arrows on your display).
Tips