CareCo Minimus MS01097, User Manual

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2. SAFETY NOTICE
EMI
ELECTROMAGNETIC INTERFERENCE (EMI) FROM RADIO WAVE SOURCES
The wheelchair and/or battery charger meet the requirements of ISO 7176-21 : 2009.
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
or exposure or to minimize the degree of exposure, and suggested action should unexpected or
erratic movement occur.
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 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 Electrical scooter 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
CAUTION It is very important that you read this information regarding the
possible effects of electromagnetic interference on your electric scooter.
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;