Handicare Fotress 1700 - Manual (Page 17)

17
CAUTION:
IT IS VERY IMPORTANT THAT YOU READ THIS INFORMATION REGARDING THE
POSSIBLE EFFECTS OF ELECTROMAGNETIC INTERFERENCE ON YOUR POWERED
SCOOTER.
ELECTROMAGNETIC INTERFERENCE (EMI) FROM RADIO WAVE SOURCES
Motorized scooters may be susceptible to electromagnetic interference (EMI), 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 powered scooters to release their brakes, or move by itself. It can also permanently damage a powered
scooter's electronic 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. 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 20V /m immunity
level, which should provide useful protection from the more common sources of radiated EMI.
THE IMMUNITY LEVEL OF THIS SCOOTER IS 20 V/m (Volts/meter).
There are a number of sources of relatively intense electromagnetic fields in the every day 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 of exposure to EMI will be minimized. The sources of radiated EMI can be
broadly classified into three types:
1) Hand-held Portable Transceivers
Transmitters or receivers with the antenna mounted directly on the transmitting unit. Examples include: citizen band (CB)
radios; walkie talkies; security, fire and police transceivers; cellular telephones; and other personal communication devices.
NOTE: Some cellular telephones and similar devices transmit signals while they are ON, even when not being
used.
2) Medium-range Mobile Transceivers
Transmitters or receivers 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
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 players, Cassette 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 scooter.
Also, the scooter is itself a source of EMI and could disturb the performance of electromagnetic fields such as security alarm
systems.
EMI CONSIDERATIONS