SEVEN PLUS User’s Guide | 57
The SEVEN PLUS System requires you to “calibrate” the Sensor
glucose readings to your blood glucose meter. The purpose of calibration is
so the glucose uid your Sensor measures can be displayed to you in a read-
ing on your Receiver that is like your blood glucose meter reading.
4.1 HOW TO CALIBRATE
There are two methods you can use to calibrate your System. You can either
use the OpenChoice feature on your SEVEN PLUS, or you may use the
Auto Upload method.
The OpenChoice feature allows you to hand enter your readings into the System, and you can
use any FDA-cleared meter you choose. With Auto Upload, you must use the LifeScan One-
Touch Ultra meter, and the optional Connection Cable for calibration. This Connection Cable can
be purchased from DexCom Customer Support.
You will need to perform three types of calibration on your Receiver:
1. Start-Up Calibration 2. Calibration Update 3. Re-calibration
Start-Up Calibration happens at the end of the 2-hour Start Up Period. Start-Up Calibration takes
2 blood glucose ngersticks. Calibration Update is a calibration that must be performed every
12 hours (about 2 times per day). The Receiver will remind you when these calibrations are
needed. Re-calibration may be required if one of the blood glucose readings entered for Start-
Up Calibration or Calibration Update is not accepted by the Receiver.
The sections in this Chapter tell you how to use OpenChoice and AutoUpload methods for
calibrating your system. The sections also describe Start-Up Calibration, Calibration Update,
and How to Re-calibrate in more detail.
CONTRAINDICATION: Use of acetaminophen-containing
medications while the Sensor is inserted may affect the
performance of the device
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