What does "Calibration error" mean?

This screen means you recently entered a calibration blood glucose value and the sensor is having trouble calibrating. Follow the directions on the screen to enter a finger stick reading in 15 minutes to restore readings.

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What does Calibration Not Used mean on my G7 CGM?

If you have entered a calibration, you may see Calibration Not Used in your History tab. This means that your Dexcom G7 sensor was not able to use the calibration you entered.
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Where can I find when I last calibrated?

You can check your receiver for information about your CGM at any time.
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