Emi - Electromagnetic Interference - Mercury M48 GT Owner's Handbook Manual

2.4 EMI
This section will provide the user with basic information that describes the problems with EMI, known
sources of EMI, protective measures either to lessen the possibility or 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 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 metre (V/m). Each powered vehicle can resist EMI up to a certain
intensity. This is called it's '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 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 warnings 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 talkies', security / fire /
police transceivers, and mobile telephones.
Note: Some mobile telephones and similar equipment transmit signal while they are ON, even
when not being used.
2. Medium-range mobile transceivers, such as those used in police cars, fire engines, ambulances
and taxis. These usually have antennae mounted on the outside of the vehicle.
3. Long-range transmitters and transceivers, such as commercial broadcast transmitters (radio and
TV broadcast towers) and amateur (HAM) radios.
Note: Other types of hand-held devices, such as cordless phones, laptop computers, AM/FM radios, TV
sets, CD and DVD players, and small appliances such as electric shavers and hair dryers, so far as we
know are not likely to cause EMI problems to your powered vehicle.
POWERED VEHICLE ELECTROMAGNETIC INTERFERENCE (EMI)
Because EM energy rapidly becomes more intense as one moves closer to the 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 vehicle's control system while using these devices.
This can affect vehicle movement and braking. The warnings listed below are recommended to prevent
possible interference with the control system of the vehicle:
Wheeltech M48 GT electric scooter
Owner's Handbook
Part Code: Z40962-00
Page 6 of 6