Calibration can help make the Dexcom G7 more accurate, and it should bring the G7 readings closer to the meter values. When using your fingerstick meter, make sure: Your test strips are stored as directed and are not expired. Your hands are clean. Wash your hands thoroughly with soap and water and dry them, then do the fingerstick test.. This is key. You need a reading from your trusty meter to calibrate the G7. Prick my finger and get a reading. You know the drill. The G7 can handle readings between 40 mg/dL and 400 mg/dL, so make sure your meter reading falls within that range. Open up the Dexcom G7 app on my phone. I find it easier to use the app.
I like the new feature that has the option of entering blood glucose levels without calibrating on the G7 (G6 didn't have it). Several Dexcom reps told me that they need 3 points on scores in order to determine wether it's a bad sensor. So now beside calibration, you can record these scores to have as evidence if needed.. Step 3: Compare Your Dexcom G7 Reading. Once you have your blood glucose meter reading, immediately check your Dexcom G7 app or receiver to compare the two values. Since the Dexcom G7 updates every five minutes, try to compare both readings at the same time to get a more accurate match. Step 4: Allow for Sensor Delays