Monark 839 E, Manual

Page: 11 / 40

Monark Ergomedic 839 E
11
5.3 Calibration electronics
Calibration is necessary to match the mechanics
of the ergometer to the electronics of the com-
puter. The following steps are required to recali-
brate the electronics to the pendulum scale.
1. Check at the bottom of the flywheel that the
brake belt is loose. If not move the pendulum up
to 3 kp and hold it for a few seconds. Move the
pendulum to the zero position again. Check that
the brake belt is loose.
2. Align the force scale with zero mar-
ker on the pendulum. Refer to section
”Zero adjustment of meter panel” for details.
3. Press key 5 in the main menu (Calibration) and
follow the display instructions. Hold the pendu-
lum at 0-position and wait for one “beep”.
4. Hold the pendulum at 2 kp-position and wait
for one “beep”. Hold the pendulum at 4 kp-po-
sition and wait for one “beep”. Move the pen-
dulum to the 6 kp position as told in the display.
Hold it in position and wait for two “beeps”
shortly after each other.
5. Lower the pendulum to the resting position
(0-marking). Calibration is done.
The calibration coefficient which has been cal-
culated by the computer is stored in the continu-
ous 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 er-
gometer often. The coefficient is maintained even
when power is removed and the physical orien-
tation of the frame, within the limits of normal
riding, has no effect on the electrical calibration.
Recalibration should be preformed 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 preformed. 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 displays
shoeing 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 it will take a few seconds
before normal workload is obtained.
5.4 Power on crank or flywheel
839 Ergometer adapted to ECG-work tests is set
to measure the power on the crank.
839 Ergometer adapted to fitness tests is set to
measure the power on the flywheel.
A sticker, placed on the head tube, see fig: EKG-
sticker , informs that the ergometer is set to me-
asure the power on the crank.
Calibration
Fig: EKG-sticker