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Precautions
Secure internet: Only use a cellular internet connection, a trusted Wi-Fi network (like
your home or office), or use a secure internet connection such as a VPN service when
using your G7 system.
Don't use unsecured public Wi-Fi such as guest networks in other's homes,
restaurants, schools, libraries, hotels, airports, airplanes, etc. Those could expose
your G7 system to viruses or hacking.
Check connected devices: When using connected devices such as headphones,
Bluetooth speakers, or smartwatches, you may get your alerts on only one, not all.
After connecting any devices, make sure that your smart device settings allow you to
continue receiving alerts.
Clean and dry skin: If your insertion site and hands aren't clean and dry, you run the
risk of infection and the sensor not sticking well. Clean your insertion site with alcohol
wipes to prevent infections. Before insertion and during your sensor session, don't
apply insect repellent, sunscreen, perfume, or lotion on your insertion site or sensor.
This may cause the sensor to not stick well or could damage your Dexcom G7 CGM
System.
Hydroxyurea: If you are taking hydroxyurea, your sensor readings may be falsely
elevated and result in missed hypoglycemia alerts or errors in diabetes management
decisions. The level of inaccuracy depends on the amount of hydroxyurea in your
body. Use your meter if you have taken hydroxyurea.
Be accurate, be quick: If you calibrate your Dexcom G7 CGM System using your BG
meter, enter the BG meter value on your meter within five minutes of measuring your
BG.
Use fingertips: Use a BG sample from your fingertips when calibrating as blood
glucose from other places may be less accurate and not as timely. Calibration is not
required but you can do optional BG calibration to align with your meter.
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Need help?
Do you have a question about the G7 and is the answer not in the manual?
Questions and answers
changed sensor, it paired but get a message sensor failed start new sensor
The Dexcom G7 sensor may show a failure message after pairing due to issues such as using an outdated sensor version that is not compatible with certain devices, signal loss, or sensor adhesion problems. If pairing with a Tandem hybrid closed-loop system, an older Dexcom T7 version may cause an error message like "sensor not started 43t." Checking the sensor's LBL number and ensuring compatibility can help resolve the issue. If the problem persists, contacting Dexcom for a replacement may be necessary.
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How long after eating does readings reach the sensor?
The Dexcom G7 sensor measures glucose in interstitial fluid, not blood, and glucose levels in interstitial fluid can lag behind blood glucose levels, especially when glucose is changing rapidly. This means that after eating, the sensor reading may take some time to reflect actual blood glucose changes. The exact time can vary, but differences are more noticeable when glucose levels are rising or falling quickly.
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Wait time between showing & inserting new G7 sensor
The Dexcom G7 sensor has a 12-hour grace period at the end of its session, allowing time to replace the sensor. After inserting a new sensor, there is a sensor warm-up period before readings and alerts begin.
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Power off is where
The power off button on the Dexcom G7 receiver is the right button with a circle on it, also known as the Select button.
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How to change zone settings in G7 on Android phone app?