6
to make a direct calculation how radio waves will influence the vehicle).
If the vehicle moves abnormally or the brake system fails after turning on the
power source under normal operating conditions, notify the manufacturer
immediately.
3. EMI/RFI
This section provides the user with basic information about the problems with EMI, known
sources of EMI and protective measures either to reduce the possibility of exposure or to
minimize the degree of exposure. This section also shows some conditions in which unexpected
or erratic scooter movements may occur.
CAUTION
It is very important that you read this information regarding the possible effects of
electromagnetic interference on your electric KARMA Scooter.
Electromagnetic Interference From Radio Wave Sources
Powered vehicles 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 vehicle to release its brakes, move by itself, or move in
unintended directions. It can also permanently damage the powered vehicle's control system. The
intensity of the interfering EM energy can be measured in volts per meter (V/m). Each powered
vehicle can resist EMI up to a certain intensity. This amount of resistance is called its immunity
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 vehicle model, with no further
modification, has an immunity level of 20 V/m without any accessories.
There are a number of sources of relatively intense electromagnetic fields in our everyday
environment. Some of these sources are obvious and easy to avoid. Others are not apparent and
exposure could be unavoidable. However, we believe that by following the warnings listed below,
your risk to EMI can be greatly minimized.
The sources of radiated EMI can be broadly classified into three types:
1. Hand-held portable transceivers (transmitter-receivers) with the antenna
mounted directly on the transmitting unit, such as citizens band (CB) radios,
walkie-talkies, security and fire or police transceivers, cellular telephones and
other personal communication devices;
NOTE:
Some cellular telephones or similar devices transmit signals while they are ON, even
though they are not in use.
