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BOSS HD Equalizer Tilt System
Powered Wheelchair Electromagnetic Interference (EMI)
Because EM energy rapidly becomes more intense as one moves closer to the transmitting antenna
(source), the EM fi elds 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 wheelchair's control
system while using these devices. This can affect powered wheelchair movement and braking. Therefore,
the warnings listed below are recommended to prevent possible interference with the control system of
the powered wheelchair.
WARNINGS:
Electromagnetic interference (EMI) from sources such as radio and TV stations, amateur radio (HAM)
transmitters, two-way radios, and cellular phones can affect powered wheelchairs and motorized scooters.
Following the warnings listed below should reduce the chance of unintended brake release or powered
wheelchair 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 communications devices, such as cellular phones, while
the powered wheelchair 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 wheelchair OFF as
soon as it is safe;
4) Be aware that adding accessories or components, or modifying the powered
wheelchair, may make it more susceptible to EMI (Note: There is no easy way to
evaluate their effect on the overall immunity of the powered wheelchair);
5) Report all incidents of unintended movement or brake release to the powered
wheelchair manufacturer, and note whether there is a source of EMI nearby.
Important Information
1) 20 volts per meter (v/m) is a generally achievable and useful immunity level against EMI
(as of May 1994) (the higher the level, the greater the protection).
2) Because of the large variance in positions, adjustments and different seating
combinations which each affect the EMI immunity, it is not possible to test specifi c
immunity level.
Modifi cation of any kind to the electronics of this wheelchair as manufactured by
Leisure-Lift may adversely affect the EMI immunity levels.
The immunity level of this model of wheelchair is unknown.
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