Troubleshooting guide
Monark 831 E
17
Electronic calibration
Calibration is necessary to match the mechanics of
the ergometer to the electronics of the computer.
The following steps are required to recalibrate the
electronics to the pendulum scale.
Check at the bottom of the flywheel that the brake 1.
belt is loose. If not move the pendulum to 4 kp
and hold it for a few seconds. Move the pendulum
to the zero position again. Check that the brake
belt is loose.
Align the force scale with zero marker 2.
on the pendulum. Refer to section
”Zero adjustment of meter panel” for details.
Press key ‘5’ in the main menu (Calibration) and 3.
follow the display instructions. Hold the pendulum
at 0-position and wait for one beep.
Hold the pendulum at 2 kp-position and wait for 4.
one beep. Hold the pendulum at 4 kp-position and
wait for one beep. Move the pendulum to the 6 kp
position as told in the display. Hold it in position
and wait for two beeps shortly after each other.
Lower the pendulum to the resting position 5.
(0-marking). Calibration is done.
The calibration coefficient which has been calculated
by the computer is stored in the continuous memory.
Whenever power is applied to the ergometer, the latest
calibration value is restored to maintain memory. A
new calibration replaces previous values.
Generally, it is not necessary to recalibrate the
ergometer often. The coefficient is maintained even
when power is removed and the physical orientation
of the frame, within the limits of normal using, has
no effect on the electrical calibration. Recalibration
should be performed following any service, component
replacement, or transport of the unit or after setting
to default in the service menu (‘99’).
A daily validation of the pendulum force sensor
should be performed. If the procedure reveals an
error, recalibration may be necessary.
Check of the electronic calibration can be done
as follows: From main menu go to any of the test
windows showing Newtons (N). Move the pendulum
to 4 kp (39N). This position shall now be read in the
display. If not perform a new calibration.
NOTE!
After this check the brake belt will be loose, which
means that the first time the ergometer is used after
calibration it will take a few seconds before normal
workload (5 N) is obtained.