Levo C3 User Manual

23
7. Electromagnetic interference (EMI)
Important: You must be aware of the effect of electromagnetic
interference (EMI) regarding your LEVO C
3
. 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) may 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 unwanted direction or the stand-up function could
operate with request. There could be damage 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 a certain amount of electromagnetic interference.
This is called the "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 C
3
standard version (no extra protective measures) is supplied with a
disruptive strength level of 20 vpm.
The LEVO C
3
is constructed to resist to a regular level of interference as it occurs
in a household. Beside that there exist a certain number of sources of relatively
strong magnetic fields from which you should stay at a safe distance. Some of
these magnetic fields are obvious and easy to avoid. Some other are not easy to
recognise and can be hard to avoid. Please be aware 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 are put in three categories:
• Portable sender and receiver on which an aerial is directly mounted.
Examples: CB-radio, walkie-talkie, sender and receiver of alarm 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 are no known incidents caused by mobile phones to date.
• Mobile sender and receiver of intermediate range as installed in police cars,
fire engines, ambulances and cabs. The aerial is normally fixed on the outside
of the vehicle.
• Long-range senders and receivers such as radio and TV stations and amateur
radio sets.

Levo C3 Specifications

General

Brand	Levo
Model	C3
Category	Wheelchair
Language	English