Troubleshooting guide

1
Monark 839 E
12
Calibration
The 839 E is a mechanically weighted and braked
ergometer, making performance validation a simple
procedure. Calibration is necessary to match the
mechanics of the ergometer to the electronics of the
computer. The work performed on the ergometer is
the product of the weight lifted times the numbers
of revolutions (factored). Validation includes both
mechanical and electronic procedures. For more
information, see Manual terminal (art. No: 7950-
302) or the manual of the software. If the ergometer
fails to pass any section of the validation, proceed to
the calibration and/or service menu (‘99’ in the main
menu).
Inspection of all mechanical components is suggested
after any repair, or component service. The following
validation should be performed annually:
Remove the cover from the flywheel.1.
Loosen the brake belt at the balancing spring.2.
Wait until the flywheel is no longer moving.3.
The pendulum weight index should be aligned 4.
with “0“ on the scale.
Attach the calibration weight where the balancing 5.
spring was placed, see fig: Calibration weight
The known weight should match the value on the 6.
scale. If not see section “Calibration of Pendulum
Weight “.
Reattach the tension belt.7.
Reassemble the cover.8.
Proceed to the “Daily check” to complete, which is
also included in the yearly check.
Fig: Calibration weight
Daily check
The following procedure will assure the user that the
ergometer is performing properly on a daily basis.
Check of pulse function, see section. •
Check of work load, see section.•
Move the pedals round and make sure that it •
obtained a reasonable rpm - check against a clock.
Check so the pedals are smooth and nice. Listen
for unusual sounds. Fix.
Check / adjust the handlebar and saddle and check •
that they are tighten.
Check that the support tubes are properly attached •
by wobble the bike. Tighten if necessary.
If you found something strange at the daily validation
that you cannot fix by your own, please contact the
service at Monark Exercise.
Checking of the pulse function
While a patient is at rest and has been prepared for
chest belt electrodes or an ear sensor, the pulse indicator
flashes once per pulse beat. The displayed heart rate,
should agree with the manually detected pulse rate. If
not, check the patient electrode connection and skin
preparation prior to requesting service. If not, check
the patient electrode connection and skin preparation
prior to requesting service.
Fig: Placement of the chest belt
Fig: Electrodes on the back of the chest belt (1)