Instruction Booklet: Safety lnfomation on Electronic Interference (EMI)
CAUTION: It is very important that you read this information regarding the possible effects
of Electromagnetic Interference on your motorized scooter.
Powered wheelchairs and motorized scooters may be susceptible to electromagnetic interference
(EMI), which is interfering electromagnetic energy (EM) emitted from sources such a radio
stations, TV stations, amateur radio (HAM) transmitters, two-way radios, and cellular phones. The
interference (from radio wave sources) can cause the motorized scooter to release its brakes,
move by itself, or move in unintended directions. It can also permanently damage the motorized
scooter control system. The intensity of the interfering EM energy can be measured in volts
per meter (V/m). Each motorized scooter can resist EMI up to certain intensity. This is called its
"immunity level." The higher the immunity level, the greater the protection. At this time, current
technology is capable of achieving at least a 20 V/m immunity level, which would provide useful
protection from the more common sources of radiated EMI. This immunity level of this motorized
scooter model is 20 V/m.
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.
Tiller Angle Adjustment:.
• Hand-held portable transceivers (transmitters-receivers) with the antenna mounted directly on
the transmitting unit. Examples include: citizens band (CB) radios, "walkie talkie," security, fire,
and police transceivers, cellular telephones, and other personal communication devices;
CAUTION: Some cellular telephones and similar devices transmit signals while they are ON,
even when not being used.
• Medium-range mobile transceivers, such as those used in police cars, fire trucks, ambulances,
and taxis. These usually have the antenna mounted on the outside of the vehicle; and
• Long-range transmitters and transceivers such as commercial broadcast transmitters (radio
and TV broadcast antenna towers) and amateur (HAM) radios.
CAUTION: Other types of hand-held devices, such as cordless phones, laptop computers,
AM/FM radios, TV sets, CD players, and cassette players, and small appliances, such as
electric shavers and hair dryers, so far as we know, are not likely to cause EMI problems to
your motorized scooter.
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