Abbott FreeStyle Libre 2 - Rapid-Acting Insulin Calculator Specifications

USB Cable
Abbott Diabetes Care PRT21373
Length: 94 cm (37 inches)
* Security measures:
The communication between the Reader and Sensor during a scan is a short range Near Field
Communication (NFC) method which makes it dicult to interfere with or intercept during transmission.
The transmitted data is protected by a proprietary data format, encryption, and memory map. The integrity
of transmitted data is ensured by a cyclic redundancy check (CRC) generated by Sensor and veried by the
Reader. The communication between the Reader and Sensor for Alarm data is a standard Bluetooth Low
Energy (BLE) connection. The pairing of the Sensor to the Reader is accomplished during activation with an
authenticated login procedure that uses an Out-of-band key exchange (NFC). This prevents unauthorized
devices from connecting to the Sensor. The transmitted data is protected by a proprietary data format
and encryption. This prevents unauthorized devices from accessing the data if they are within range and
intercept the transmission. Under normal operation, the industry standard BLE protocols allow for many
users to be in the same vicinity. In the case where the connection is lost due to out-of-range or interference,
reconnection is only possible with the authenticated Reader that activated the Sensor.
Quality of Service (QoS):
QoS for the FreeStyle Libre 2 Reader and Sensor wireless communications using NFC is assured within
the eective range of 4 cm between the Sensor and Reader that is specied to occur within 15 seconds.
QoS for the wireless communication using BLE is assured between the Reader and Sensor at regular
1-minute intervals. If connection is lost between the Reader and Sensor for 5-minutes, the connection
lost symbol displays. If connection is lost for 20 minutes, the Reader alarms the user if the alarm is turned
on. If connection is lost between the Sensor and the Reader, up to 8 hours of glucose results can be
retrieved by performing a scan with the Reader. The Reader is designed to only accept radio frequency (RF)
communications from recognized and paired Sensors.
Rapid-Acting Insulin Calculator Specifications
Parameter Unit Range or Value
Correction target mmol/L 3.9 to 10.0
Carbohydrate ratio
1 unit per X grams
of carbs
1 to 50
Carb portion ratio
Units of insulin per
carb portion
0.5 to 15
Carb portions denition Grams of carbs 10 to 15
Mealtime insulin doses
(breakfast, lunch, dinner)
Units of insulin 0 to 50
Correction factor
1 unit per X
mmol/L
0.1 to 5.5
Insulin duration
(duration of insulin action)
Hours
Easy: 4
Advanced: 3 to 8
Dose increments Units of insulin 0.5 or 1
Maximum insulin dose Units of insulin 50
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