Garmin Edge 605 - Manual (Page 9)

not enough room between the
sensor arm and the spoke. The
magnet must be aligned with
the sensor arm indication line.
4. Loosen the screw on the sensor
arm and move it to within 5 mm of
the spoke magnet. You can also
tilt the GSC 10 closer to either
magnet for improved alignment.
5. Press the Reset button on the
GSC 10. The LED turns red,
then green. Pedal to test the
sensor alignment. The red LED
blinks each time the crank arm
passes the sensor, and the green
LED blinks each time the wheel
magnet passes the sensor arm.
note: The LED blinks
for the first 60 passes after
a reset. Press reset again
if you require additional
passes.
GSC 10 and magnet alignment
Spoke magnet
Sensor arm
indication line
Pedal magnet
GSC 10