Precor C842i Owner's Manual page 71

Level the recumbent cycle. Before allowing users on the recumbent
cycle, make sure it does not wobble from side to side.
Height adjusters
To remove any side-to-side movement, ask your assistant to tip the unit
on its side so that you can locate the two height adjusters on the rear
crossbar.
Turn the height adjusters until the unit does not wobble or rock from side
to side.
Important: If the unit is placed on a slightly uneven surface, rotating
the height adjusters can help, but will not compensate for extremely
uneven surfaces.
When you are finished making adjustments, ask your assistant to gently
lower the unit to the floor.
C846i/C842i Recumbent Cycle Assembly Guide
Verify that the C846i heart rate display is operational.
1. Sit on the cycle. When you are comfortably situated, begin
pedaling. Pedaling above 20 revolutions per minute (RPM) must
be maintained for several seconds.
2. Grasp both touch-sensitive grips on the seat handlebars.
3. Look at the Heart Rate display. The letters Hr should be blinking.
After a few seconds, a number appears indicating your heart rate.
Note: If the display remains blank, refer to the Product Owner's Manual
for troubleshooting tips. Instructions regarding the chest strap are also
found in the Product Owner's Manual.
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