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MM-01 / 02 Owner's Manual MM-01 / 02 Owner's Manual
3. EMI
This chapter of the manual 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.
ELECTROMAGNETIC INTERFERENCE (EMI) FROM RADIO WAVE
SOURCES
Powered scooters 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 scooter to release its brakes, move by itself, or move in unintended
directions. It can also permanently damage the powered scooter’s control
system. The intensity of the interfering EM energy can be measured in volts per
meter (V/m). Each powered scooter 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
an immunity level of 20 V/m without any accessories.
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.
es:
1.
Hand-held portable transceivers (transmitter-receivers with the antenna
mounted
directly on the transmitting unit). Examples include: citizens band (CB) or hand
and
other personal communication devices.
NOTE: Some mobile phones transmit a signal while they are ON but not being used.
◊Caution
It is very important that you read this information regarding the possible effects
of electromagnetic interference on your electric MM-01/02 Scooter
3. Long-range transceivers,such as commercial broadcast transmitters (radio and
TV broadcast antenna towers) and amateur (HAM) radios.
NOTE: Other types of hand-held devices, such as cordless phones, laptop
computers, AM/FM radios, TV sets, CD player, and cassette players, and small
appliances, such as electric shavers and hair dryers, are not likely to cause
EMI problems to your powered scooter.
POWERED SCOOTER ELECTROMAGNETIC INTERFERENCE(EMI)
EM energy rapidly becomes more intense as one moves closer to a transmitting
antenna (source). The EM fields from hand-held radio wave sources (transceivers)
are of special concern. It is possible to unintentionally bring high levels of EM
energy very close to the powered scooter’s control system while using these
devices; this can affect your scooters movement and braking. Therefore, the
warnings listed below are recommended to prevent possible interference
with the control system of a powered scooter.
Despite compliance with all applicable EMC directives and standards, it is possible
that the scooter may affect or be affected by other electrical devices that emit
electromagnetic fields (e.g. mobile phones, alarm systems at shops, or automatic
doors). Meanwhile, the driving performance could be influenced by electromagnetic
fields. If you are aware of any such interference, either turn off the other device or
turn off your scooter and move it outside the range of the interference.
Warning!
Electromagnetic interference (EMI) from sources such as radio and TV stations,
amateur radio (HAM) transmitters, two-way radios, and mobile phones can
affect motorized scooters. Following the warnings listed below should reduce
the chance of unintended brake release or powered scooter movement which
could result in serious injuries.
1. Do not operate hand-held transceivers-receivers, such as citizens band
(CB) radios, or turn ON personal communication devices, such as mobile
phones, while the powered scooter is turned ON.
2. Be aware of nearby transmitters, such as radio or TV stations, and try to
avoid getting close to them.
3. If unintended movement or brake release occurs, turn the powered scooter
OFF as soon as it is safe.
4. Be aware that adding accessories or components, or modifying the powered
scooter, may make it more susceptible to EMI.
5. Report all incidents of unintended movement or brake release to the scooter
manufacturer, and note whether there were sources of EMI nearby.
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2. Medium-range mobile transceivers, such as those used in police care, fire trucks,
ambulances and taxis usually have the antenna mounted on the outside of the device.