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Active Mobility | xtaga Impala | User Manual
Safety
Notice
2.4 EMI
This portion of the content will provide the user with basic information that describes
the problems with EMI, known sources of EMI, protective measures either to lessen
the possibility of exposure or to minimize the degree of exposure, and suggested
action should unexpected or erratic movement occur.
Caution
It is very important that you read this information regarding
the possible effects of electromagnetic interference on your
electric scooter.
Electromagnetic Interference (EMI) from Radio Wave Sources
Powered vehicle 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 is called its “immunity level”. The
higher the immunity level, the greater the protection. At this time, current technology
can achieve 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 as
shipped, 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 the
everyday environment. Some of these sources are obvious and easy to avoid.
Others are not apparent and exposure is unavoidable. However, we believe that by
following the warning listed below, your risk to EMI will be 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. Examples include: citizens band (CB)
radios, “walkie talkie”, security, fire, and police transceivers, cellular telephones
and other personal communication devices.
2. Medium-range mobile transceivers, such as those used in police cars, fire trucks,
ambulances and taxis. These usually have the antenna mounted on the outside
of the Vehicle,
3. Long-range transmitters and transceivers, such as commercial broadcast
transmitter (radio and TV broadcast antenna towers) and amateur (HAM) radios;