Replacing the heart rate monitor battery.
Garmin 520 speed sensor battery.
Locate the circular battery cover on the back of the sensor.
Place and hold the speed sensor on top of the wheel hub.
Caring for the heart rate monitor.
Pull the strap around the wheel hub and attach it to the hook on the sensor.
Speed sensor and cadence sensor specifications.
Cadence data from the cadence sensor is always recorded.
Replacing the speed sensor or cadence sensor battery.
Locate the circular battery cover on the back of the sensor.
Cadence is your rate of pedaling or spinning measured by the number of revolutions of the crank arm per minute rpm.
Replacing the speed sensor or cadence sensor battery.
If no speed and cadence sensors are paired with the device gps data is used to calculate the speed and distance.
Speed sensor and cadence sensor specifications.
Replacing the speed sensor or cadence sensor battery the led flashes red to indicate a low battery level after two revolutions.
Caring for the heart rate monitor.
Garmin recommends you secure your bike on a stand while installing the sensor.
Replacing the speed sensor or cadence sensor battery the led flashes red to indicate a low battery level after two revolutions.
A walkthrough of how to change the battery on a garmin speed sensor.