To use a sports watch as a heart rate monitor, it must be made visible in the settings. With the Polar M430, this is done as follows. Other Polar watches will have a similar process.
1. Scroll to settings
2. Select 'Sports Profiles
3. Choose ' Cycling'
4. Choose 'heart-rate settings'
5. Scroll to 'Heart rate visible to other devices'
6. Select 'on'
Now start a bike workout on the watch, and the watch will be visible on your TrueKinetix device as a heart rate monitor.