CareCo AirLite X, User Manual

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PAGE 6
Electromagnetic Interference (Emi) From Radio Wave Sources
Powered scooters 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, two-way radios, and mobile phones. The
interference (from radio wave sources) can cause the powered scooter to release its
brakes, move by itself, or move in unintended directions. It can also permanently
damage the powered scooter’s control system. The intensity of the interfering EM
energy can be measured in volts per meter (V/m). Each powered scooter can resist EMI
up to a certain intensity 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 powered scooter model as shipped, with no further modification, has an immunity
level of 20 V/m without any accessories.
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 warning 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 ( transmitter-receivers with the antenna mounted
directly on the transmitting unit). Examples include: citizens band (CB) or hand held
radios,(security, fire, and police transceivers), mobile telephones and other personal
communication devices.
2. Medium-range mobile transceivers, such as those used in police cars, fire trucks,
ambulances and taxis usually have the antenna mounted on the outside of
the scooter.
3. Long-range transmitters and transceivers, such as commercial broadcast
transmitters (radio and TV broadcast antenna towers) and amateur (HAM) radios.
NOTE: some mobile telephones transmit a signal while they are ON, even though
they are not being used.
NOTE: Other types of hand-held devices, such as cordless phones, laptop computers, AM/
FM radios, TV sets, CD player, and cassette players, and small appliances, such as electric
shavers and hair dryers, are not likely to cause EMI problems to your powered scooter.
3 EMI