EMI
36
This portion of the content will provide the user with
basic information about the problems with EMI
(electromagnetic interference), protective measures can
be used to either lessen the possibility of exposure or to
minimize the degree of exposure; this section also
shows some conditions that unexpected or erratic
movements may cause.
It is very important that you read this
information regarding the possible effects of
electromagnetic interference on your electric KYMCO
WHEELCHAIR.
ELECTROMAGNETIC INTERFERENCE (EMI) FROM
RADIO WAVE SOURCES
Powered wheelchairs 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 cellular phones. The
interference (from radio wave sources) can cause the
powered wheelchair to release its brakes, move by itself,
or move in unintended directions. It can also
permanently damage the powered wheelchair’s control
system. The intensity of the interfering EM energy can
be measured in volts per meter (V/m). Each powered
wheelchair 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 wheelchair model as shipped,
with no further modification, has an immunity level of
20 V/m without any accessories.
