3/13/2008
4
Figure 1
EMI WARNING
Electromagnetic Interference (EMI) from Radio Wave Sources
Powered electric chairs may be susceptible to electromagnetic
interference, which is a kind of interfering electromagnetic energy
(EM) emitted from sources such as radio stations, TV stations,
amateur radio (HAM) transmitters, two-way radios and cellular
phones. The interference (from radio wave sources) can cause the
power chairs to release its brakes, move by itself or move in
unintended directions. It can also permanently damage the powered
chair’s control system.