User's Manual

68 | Continuous Glucose Monitoring System
5.4.2 MISSING GLUCOSE READINGS
At certain times, a notifi cation symbol may appear in the Status Area of the
Trend Graph. These notifi cations are helpful in troubleshooting why glucose
readings do not appear on the Receiver. The table in the previous section shows
the symbols that might appear in the Status Area.
Missing Glucose Information can happen when:
1. The System needs another fi ngerstick reading for calibration because
the Sensor readings do not match the recent fi ngerstick reading you just
entered.
2. The Receiver does not understand the Sensor signal.
3. The Sensor/Transmitter and Receiver are out of range. Make sure the
Sensor/Transmitter and Receiver are within 20 feet (6 meters) of each other.
For calibration errors see Chapter 8. The following
sections will tell you what happens when the Receiver
does not understand the Sensor signal, and when
your Sensor/Transmitter and Receiver are out of
range. If your Receiver is not displaying glucose
information, look at the Status Area on the Trend
Graph.
Status Area
55
15 Minute
Calibration
Error
Means the Sensor cannot calibrate right now. If you see this screen,
enter at least 1 more calibration fi ngerstick reading after about
10-15 minutes. If the Sensor still cannot calibrate using this additional
fi ngerstick reading, the Sensor needs to be replaced. (See Chapter 8,
Section 8.4.)
1 Hour
Calibration
Error
Means the Sensor is not calibrating properly. If you see this screen, wait
about one hour and then enter at least 1 more fi ngerstick reading. If no
readings display on the Receiver after this additional fi ngerstick, the
Sensor needs to be replaced.
Wait
The single hourglass means the Receiver has detected a potential
problem with the Sensor signal. You should wait about 30 minutes for
more prompts. Do not enter any fi ngerstick readings when you see this
symbol.