Inserting and starting your Guardian™ sensor
MiniMed™ 780G insulin pump with Guardian™ Sensor 3
MiniMed™ 780G insulin pump with Guardian™ 4 sensor
Device: MiniMed™ 780G insulin pump with Guardian™ Sensor 3
Gather Your Supplies
Before you insert your sensor, gather all of your supplies:
- One-press serter is required in order to insert the sensor properly.
- Guardian™ Sensor 3 is individually packaged and comes attached to a plastic pedestal which is necessary for proper loading into the serter.
- Oval Tape is required to keep the sensor securely in place.
- The Guardian™ Link 3 transmitter is connected after the sensor is inserted and is then covered with the oval tape.
Choose a Site
The Guardian™ Sensor 3 has been studied and is approved for use in the following sensor insertion sites by persons of the following ages:
Approved Age | Sensor Insertion Site |
7-13 | Abdomen and Buttocks |
14 and older | Abdomen and Arm* |
*Assistance may be needed for sensor insertion into back of upper arm and into the buttocks. Some users found it difficult to insert the sensor into the arm and buttocks by themselves.
Choose a location for inserting your sensor. Shown here are the approved body areas (shaded) for sensor insertion:
The sensor insertion site should be at least:
- 1 inch away from your insulin pump infusion site
- 1 inch away from any manual insulin injection site (syringe, pen)
For best sensor glucose performance, avoid these sites:
- Where clothing may rub or constrict
- Where your body naturally bends a great deal and may cause the sensor to pull out
- Where you have scarred or hardened tissue or stretch marks
- Where there is a great deal of motion or friction
Inserting the Sensor
Abdomen insertion:
Starting Your Sensor
After the sensor is inserted and paired with the transmitter, the pump will display a “Start New Sensor” screen.
To start a new sensor:
Select Start New Sensor when it appears on the pump screen.
- The “Sensor warm up X:XX hr” message appears
Note: It may take up to five minutes for the “Sensor warm up X:XX hr” message to appear. The warm up period lasts two hours. Select OK.
The "Sensor warm up..." message appears on the Home screen until the sensor is ready for its first calibration.
Disconnecting the Transmitter and Removing the Sensor
When your sensor life is depleted you will need to remove your sensor to insert a new one.
To disconnect the transmitter from the sensor and remove the transmitter:
- Carefully remove the tape and any additional adhesive from the transmitter.
- Remove the adhesive tab from the top of the transmitter.
- Hold the transmitter with one hand and pinch the flexible side arms of the sensor with the thumb and forefinger of your other hand.
- Gently pull the transmitter away from the sensor.
- Pull the sensor away from your body to remove it.
- Dispose of the sensor properly, in a sharps container.
- Place the transmitter on the charger.
Device: MiniMed™ 780G Insulin Pump with Guardian™ 4 sensor
Gather Your Supplies
Before you insert your sensor, gather all of your supplies:
- One-press serter is required in order to insert the sensor properly.
- Guardian™ 4 sensor is individually packaged and comes attached to a plastic pedestal which is necessary for proper loading into the serter.
- Oval Tape is required to keep the sensor securely in place.
- The Guardian™ 4 transmitter is connected after the sensor is inserted and covered with the oval tape.
Choose a Site
The Guardian™ 4 sensor has been studied and is approved for use in the following sensor insertion sites by persons of the following ages:
Approved Age | Sensor Insertion Site |
7 and older | Back of upper arm* |
*Assistance may be needed for sensor insertion into back of upper arm. Some users found it difficult to insert the sensor into the arm by themselves.
Choose a location for inserting your sensor. Shown here are the approved body areas (shaded) for sensor insertion:

The Guardian™ 4 sensor is indicated for arm use only. Do not use Guardian™ 4 sensor on the abdomen or other body sites including the buttocks, due to unknown or different performance that could result in hypoglycemia or hyperglycemia.
The sensor insertion site should be at least:
- 1 inch away from your insulin pump infusion site
- 1 inch away from any manual insulin injection site (syringe, pen)
For best sensor glucose performance, avoid these sites:
- Where clothing may rub or constrict
- Where your body naturally bends a great deal and may cause the sensor to pull out
- Where you have scarred or hardened tissue or stretch marks
- Where there is a great deal of motion or friction
Inserting the Sensor
Back of arm sensor insertion:
Starting Your Sensor
After the sensor is inserted and paired with the transmitter, the pump will display a “Start New Sensor” screen.
To start a new sensor:
Select Start New Sensor when it appears on the pump screen.
- 5. The “Sensor warm up X:XX hr” message appears.
Note: It may take up to five minutes for the “Sensor wamp up X:XX hr” message to appear. The warm up period lasts two hours. Select OK.
The “Sensor warm up X:XX hr” message appears on the Home screen until the sensor warm up is complete. After the warm up is complete, the pump begins receiving SG readings.
Disconnecting the Transmitter and Removing the Sensor
When your sensor life is depleted you will need to remove your sensor to insert a new one.
To disconnect the transmitter from the sensor and remove the transmitter:
- Carefully remove the tape and any additional adhesive from the transmitter.
- Remove the adhesive tab from the top of the transmitter.
- Hold the transmitter with one hand and pinch the flexible side arms of the sensor with the thumb and forefinger of your other hand.
- Gently pull the transmitter away from the sensor.
- Pull the sensor away from your body to remove it.
- Dispose of the sensor properly, in a sharps container.
- Place the transmitter on the charger.
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