SUUNTO SMART SENSOR - Manual (Page 12)

a belt. If you keep your arms behind your back or put your mobile
device in a fanny pack, for instance, the transmission signal from
Suunto Smart Sensor may be interrupted.
If the Suunto Smart Sensor does not seem to be sending heart rate
data even without obstructions, try any of the following:
1. Ensure the belt contact areas (electrodes) are wet.
2. Adjust the belt so that it fits tighter against your chest.
3. If your skin tends to remain dry during a workout, use electrode
gel.
4. Check that Bluetooth is on in the device your belt is paired with.
5. Change the battery in the sensor and re-pair with your sports
watch or mobile device.
If the Suunto Smart Sensor seems to send incorrect data, try any of
the following:
1. Ensure that the sensor is attached correctly to the belt with both
snaps snugly fitted.
2. Pair the belt again with your Bluetooth-enabled device.
5.3 Battery
The Suunto Smart Sensor uses a 3-Volt lithium cell (CR 2025). With
Suunto Movescount App, you can check the battery status from the
device information when Suunto Smart Sensor is paired.
To replace the battery:
1. Remove the sensor from the belt.
2. Open the battery cover.
3. Replace the battery.
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