Troubleshooting Speed Signal Reception  If your Polar sensor is
not working as it should, try troubleshooting before contacting
your closest Polar Service.  CS speed sensor W.I.N.D. 1) Have
you taught the sensor to the training computer? See how to do
this with CS500, CS600X / CS600 , RCX5 or with RS800CX. 2) Does
a light flash in the sensor when the speed magnet passes it? The
light indicates that the speed sensor is positioned correctly
and that the sensor is alive. For more on positioning, see CS
speed sensor W.I.N.D. user manual or installation video. CS
speed sensor W.I.N.D. transmission range is approx. 10m / 32ft.
CS speed sensor 1) Is the sensor installed according to
instructions? See User Manual for CS Speed Sensor. 2) Is the
training computer positioned appropriately? For more, see here.
3) Does your bicycle have carbon fibre frame / handlebar / stem?
This may reduce transmission range. Try reducing distance
between training computer and sensor.  CS speed sensor
transmission range is max. 50 cm/19