Monark 839 E, Руководство пользователя

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Monark Ergomedic 839 E
10
Calibration
5 Calibration
The 839 E is a mechanically weighted and braked
ergometer, making performance validation a
simple procedure. The work performed on the er-
gometer is the product of the weight lifted times
the numbers of revolutions (factored). Validation
includes both mechanical and electronic proce-
dures. 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 sug-
gested after any repair, or component service.
Once per year, the following validation should be
performed.
Remove the cover from the flywheel. 1.
Loosen the brake belt at the balancing spring. 2.
Wait until the flywheel is not moving any long- 3.
er.
The pendulum weight index should be aligned 4.
with “0“ on the scale.
Attach the calibration weight to the point at 5.
which the spring was attached.
The known weight should match the value 6.
on the scale. If not see section “Calibration of
Pendulum Weight “.
Reattach the tension belt. 7.
Reassemble the cover. 8.
Proceed to the validation to complete.
5.1 Validation
The following procedure will assure the user that
the ergometer is performing properly on a daily
basis. The test exercises the mechanical braking,
pedaling and speed detecting systems as well as
the computer regulation and sensing capability of
the mechanical system.
Additionally, if a calibrated ECG simulator is
available, it may be used to verify the heart rate
measuring system. Whether the simulator is used
or not, the heart rate system may be validated by
simply taking a pulse point rate measurement at
the neck for example. 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 rate, should agree with
5.2 Force
From main menu go to any start display with
newtons (N).
With the pendulum at zero, the display should 1.
read “ 0“.
Move the pendulum weight to the 4 kp posi- 2.
tion and the display should read “39“ New-
tons.
Decrease the position of the weight by steps of 3.
1 kp. The display should read correctly at all
positions.
NB: After this check the brake belt will be so-
mewhat loose and because of this it will take a
few seconds before normal workload is obtained
the first time the ergometer is used.
Power:
Power calculation
1 rpm = 6 m on the flywheel brake surface.
50 rpm = 300 m
2 kp force makes 2 x 300 = 600 kpm/min
100 rpm= 600 m
1 kp force makes 1 x 600 = 600 kpm/min
(watt = RPM x kp)
the manually detected pulse rate. If not, check
the patient electrode connection and skin prepa-
ration prior to requesting service.