2. IMPORTANT PRECAUTIONS
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2.6 ELECTROMAGNETIC INTERFERENCE AND WARNINGS
Mobility 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 mobile phones. The interference (from radio
wave sources) can cause the mobility scooter to release its brakes, move by itself, or move in
unintended directions. It can also permanently damage the mobility scooter control system.
The intensity of the interfering EM energy can be measured in volts per meter (V/m). Each
mobility 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. The immunity level of this mobility scooter model is not
known.
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 (transmitters-receivers) with the antenna mounted directly
on the transmitting unit. Examples include: citizens band (CB) radios, “walkie talkie,” security,
fire, and police transceivers, mobile phones, and other personal communication devices.
2. 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
3. Long-range transmitters and transceivers such as commercial broadcast transmitters (radio
and TV broadcast antenna towers) and amateur (HAM) radios.
• It is very important that you read this information regarding the possible
effects of Electromagnetic Interference on your mobility scooter.
• Some mobile phones and similar devices transmit signals while they are ON,
even when not being used
