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2. SAFETY NOTICE
EMI
ELECTROMAGNETIC INTERFERENCE (EMI) FROM RADIO WAVE SOURCES
The product and/or battery charger meet the requirements of ISO 7176-21 : 2009.
This part of the content covers EMI issues, known sources of EMI, protective measures
to reduce the potential for exposure or minimize the level of exposure, and what to do
if unexpected or erratic movement occurs.
Electrical scooter 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 Electrical scooter to release
its brakes, move by itself, or move in unintended directions. It can also permanently
damage the Electrical scooter’s control system. The intensity of the interfering EM
energy can be measured in volts per meter (V/m). Each Electrical scooter 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 Electrical scooter model as shipped, with no further
modification, has an immunity level of 20 V/m without any accessories.
There are several 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 Scooter.
3. Long-range transmitters and transceivers, such as commercial broadcast
transmitter (radio and TV broadcast antenna towers) and amateur (HAM) radios.
CAUTION It is very important to read this information on the possible
effects of electromagnetic interference with the scooter.