Important Information About Electromagnetic Interference (Emi) - Permobil C350 Owner's Manual

Owner´s Manual Permobil C350
WARNING
It is very important that you read this information regarding the possible
effects of Electromagnetic Interference on your powered wheelchair.
Electromagnetic Interference (EMI) From Radio Wave Sources
Powered wheelchairs and motorized scooters (in this text, both will be referred
to as powered wheelchairs) may be susceptible to electromagnetic interference
(EMI), which is interfering electromagnetic energy (EM) emitted from sources
such as radio stations, TV stations, amateur radio (HAM) transmitters, twoway
radios, and cellular phones.
The interference (from radio wave sources) can cause the powered wheelchair
to release its parking brakes, move by itself, or move in unintended directions. It
can also permanently damage the powered wheelchair's control system. The
intensity of the interfering EM energy can be measured in volts per meter (V/m).
Each powered wheelchair can resist EMI up to a certain intensity. This is called
its "immunity level". The higher the immunity level, the greater the protection.
The immunity level of this powered wheelchair model as shipped, with no further
modification, is 20V/m in the range of 26 MHz to 1000 MHz.
There are a number of sources of relatively intense electromagnetic fields in the
everyday environment. Some of these sources are obvious and easy to avoid.
Others are not apparent and exposure is unavoidable. However, we believe that
by following the warnings listed below, your risk to EMI will be minimized.
The sources of radiated EMI can be broadly classified into three types:
1.
HAND-HELD PORTABLE TRANSCEIVERS
mounted directly on the transmitting unit. Examples includes: citizens band
(CB) radios, "walkie talkie", security, fire, and police transceivers, cellular
telephones, and other personal communication devices.
NOTE! Some cellular telephones and similar devices transmit signals while
they are ON, even when not being used.
2.
MEDIUM-RANGE MOBILE TRANSCEIVERS
trucks, ambulances, and taxis. These usually have the antenna mounted on
the outside of the vehicle.
3.
LONG-RANGE TRANSMITTERS AND TRANSCEIVERS
cast transmitter (radio and TV broadcast antenna tower) and amateur (HAM)
radios.
(transmitters-receivers) with the antenna
such as those used in police cars, fire
such as commercial broad-
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Electromagnetic Interference