maintenance and safety inspections
file: n:\article\cos14310m5-v1_07hpc-en\20130207_cos14310m5-v1.07hpc-en_h-p-cosmos_treadmill_manual.doc
© 2013 h/p/cosmos sports & medical gmbh author: fh email@h-p-cosmos.com created 07.02.2013 printed 04.03.2013 page: 111 of 197
8.3.5
Leakage current measurement
direct method: measurement in PE - line
Differential current method: supply/return line
N
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).
N
The leakage current of the equipment is to be measured
under operating conditions if - despite closed switching -
not all isolations are considered
N
Measurements must be made on both poles.
N
The unit to be tested must be isolated against earth
potential.
N
The measurement is equivalent to the earth leakage
current with grounded applied parts based on
IEC 60601.
N
During the direct method, the device being
tested is temporarily without PE-connection. Especially
devices without potential isolation transformer (sports
devices) temporarily have a voltage of approx. 120 volts
on the metal housing and frame parts. Do not touch the
device being tested during this measurement!
8.3.6
Electric safety tester and measurements
Picture: example for electric safety tester based on IEC 60601-1.
For all measurements read operation manuals of the measurement
devices carefully and verify the values and intervals with the local
guidelines and laws. An appropriate inspection record for all
measurements and instructions is available at the manufacturers. See
also detailed instructions and special protocol [cos11690xx]. Upon first
installation at the customer’s site and before first commissioning of the
running machine, the “first measured values“ have to be determined
and recorded on the special protocol and marked as “first measured
values“.
During each preventive maintenance and/or regular maintenance and/or after each repair of the device (even if it
was only mechanical repair work!), all above-mentioned electric safety measurements and checks (see protocol
[cos11690xx]) are to be performed again. All values have to be compared with the “first measured values“ and
permissible range of tolerance specified in VDE 0701/0702 (sports and fitness machines) or VDE 0751 / IEC
60601-1 (medical devices).
In case the measured values are not within the permissible range of tolerance specified in VDE 0701/0702 (sports
and fitness machines) or VDE 0751 / IEC 60601-1 (medical devices), the device must be repaired until the values
are within the specified range of tolerance. In the event that the device cannot be repaired accordingly and
immediately, it must be marked and secured against further operation. Inform the supplier and authorized service
personnel in writing immediately.
