36 BOSS 4.5, RF, P3 & P4 OWNERS MANUAL
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 unintention-
ally 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) transmit-
ters, 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); and
5) Report all incidents of unintended movement or brake release to the powered wheelchair manufac-
turer, 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)
This model of PaceSaver Scout power wheelchair has an immunity level of
20 volts per
meter
(20
v/m).
The immunity level of this model of PaceSaver Scout power wheelchair is unknown.
Electromagnetic Interference
