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Zip: 4250574, PO Box: 8306
DO-15-01-12
BalanceTutor service manual 211102.doc
Limit value <
0.3 Ω
4.3.3 Isolation resistance (R
ISO
) measurement
Resistance betwe
en „bridged“
L+N and
Protective Earth connection.
Make sure that all isolations that are under stress
of the mains voltage, are considered. All
switches and contactors need to be connected.
The measurement need to be performed with
measuring devices for the isolation resistance
measurement according to VDE 0701/0702
(sports and fitness machines) or VDE 0751/IEC
60601-1 (medical devices).
Limit value
> 2.0 MΩ
4.3.4 Equivalent (alternative) leakage current (I
EDL
) measurement
Impedance measurement, indicating the current
in the protective earth cable
The measurement is to be performed by a
measuring device for leakage current measuring
according to VDE 0701/0702 (sports and fitness
machines) or VDE 0751/IEC 60601-1 (medical
devices).
The measurement is equivalent to the single
fault earth leakage current based on IEC 60601.
Limit value < 0.5 mA
4.3.5 Control and tightening of the running belt
The belt may loosen after a while or it where adjusted wrongly. In this case, a backlash occurs
between the driving shaft and the belt, i.e. when weight is applied to the belt by stepping on it, the
belt slows down. The belt tension should be checked as follows:
Visually inspect the surface for cracks. In case of a crack replace running belt immediately.
Start the system and move to manual mode and select a speed of 1 to 1.5 km/h.
Hold on to the side handrails, place one foot on the stationary plate and with the second foot
try to block the rotation of the running belt by stemming yourself against the belt with your
feet.
Try to block the movement of the running belt for max. 3 seconds. The driving shaft and the
motor shaft should not be turning during that time. Otherwise the running belt has to be
tightened (or the driving belt).
