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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.
Note: Other types of hand-held devices, such as cordless phones, laptop
computers, AM/FM radios, TV sets, CD players, 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 powered wheelchair.
Powered Scooter Electromagnetic Interference (EMI)
Because EM energy rapidly becomes more intense as one moves closer to the
transmitting antenna (source), the EM fields from Hand-held radio wave sources
(transceivers) are of special concern. It is possible to unintentionally bring high
levels of EM energy very close to the powered scooter’s control system while
using these devices. This can affect powered scooter movement and braking.
Therefore, the warnings listed below are recommended to prevent possible
interference with the control system of the powered scooter.
WARNINGS
Electromagnetic interference (EMI) from sources such as radio and TV stations,
amateur radio (HAM) transmitters, two-way radios, and mobile phones can affect
powered scooter and motorized scooters. Following the warnings listed below
should reduce the chance of unintended brake release or powered scooter
movement, which could result in serious injury.
1) Do not operate hand-held transceivers (transmitters-receivers), such as
citizens band (CB) radios, or turn ON personal communication devices, such as
mobile phones, while the powered scooter is turned ON.
2) Be aware of nearby transmitters, such as radio or TV stations, and try to avoid
coming close to them;
3) If unintended movement or brake release occurs, turn the powered scooter
OFF as soon as it is safe.
4) Be aware that adding accessories or components, or modifying the powered
scooter, may make it more susceptible to EMI (Note: There is no easy way to
evaluate their effect on the overall immunity of the powered scooter.
5) Report all incidents of unintended movement or brake release to the powered
scooter manufacturer, and note whether there is a source of EMI nearby.
If unintended motion or brake release occurs, turn the power OFF as soon as it is
safe.
The following warning label is attached to your scooter in order to make users
always aware that a possibility of electromagnetic interference exists.
