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Electromagnetic interference (EMI)
Important:
You must be aware of the effect of electromagnetic interference
(EMI) regarding your LEVO
combi
. Please study the following facts carefully.
Electromagnetical interference of transmitter and radio wavelength
Powered wheelchairs might be influenced by strong electromagnetic interference. This
interference is caused by radio and TV stations, amateur radio sets (walkie-talkie),
two-way radios and mobile phones. Interference (especially of radio stations) might
have an influence on the brakes of a powered wheelchair so that they get released and
so the chair runs away. It could also happen that the wheelchair starts driving in a
none desired direction or the stand-up function could operate non-requested. Constant
damages could occur to the steering system of the powered wheelchair.
The intensity of power is measured in volt per meter (vpm). All powered wheelchairs
are able to resist to a certain amount of electromagnetic interference. This is called
“level of disruptive strength”. The security depends on the level of disruptive strength;
the higher the level the better the protection. Thanks to modern technology the
capability of disruptive strength is up to 20 vpm.
The
LEVO
combi
standard version (no further measures) is supplied with a disruptive
strength level of 20 vpm.
The
LEVO
combi
is constructed to resist to a regular level of interference as it occurs in
a household. Besides that there exists a certain number of sources of relatively strong
magnetic fields to which you should stay in a safe distance. Some of these magnetic
fields are obvious and easy to avoid. Some other are not easy to be realized and it is
hard to stay off at times. Please take knowledge of the following list of sources of
interference and avoid getting close to these disruptive factors. The EMI-risk is reduced
to the minimum when you follow these instructions.
The sources of radiated EMI is put in three categories:
Portable sender and receiver on which an aerial is directly mounted. Examples: CB-
radio, walkie-talkie, sender and receiver of alarming systems, fire alarm, police,
radio equipment, mobile phone and various private communication systems.
Please notice: Some mobile phones and similar objects transmit signals as soon as
they are switched on even if they are not in use at the moment.
There have not been any known incidents caused by mobile phones to date.
Mobile sender and receiver of intermediate range, as they are installed in police
cars, fire engines, ambulances and cubs. The aerial is normally fixed on the outside
of the vehicle.
Sender and receiver of a huge range, as radio and TV stations and amateur radio
sets.
Be aware that wireless phones, lap tops, AM/FM-radios, TVs, CD players, recorders as
well as gadgets like razors, hair dryers and so on are only small sources of
electromagnetical interference. These objects don’t cause any problems regarding the
functionality of the
LEVO
combi.
