Shoprider PROWLER 888WNLL, Operating Instructions Manual

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EMI Warning
Electromagnetic Interface (EMI) From Radio Wave Sources
Powered motorized Powerchairs 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 a powered Powerchair to release its brakes, move by itself or move in
unintended directions. It also can permanently damage the powered Powerchair's
control system.
The sources of radiated EMI can be classified broadly into three types:
1. Hand-held portable transceivers (transmitters-receivers) with an antenna
mounted directly on the transmitting unit. Examples include: citizens band (CB)
radios, "walkie-talkies", 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 , such as those 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 , such as commercial broadcast
transmitters (radio and TV antenna towers) and amateur (HAM) radios. **NOTE:
So far as we know, 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, are not likely to
cause problems to your powered Powerchair.
Powered Powerchair Electromagnetic Interference (EMI)
Because EM energy rapidly becomes more intense as one moves closer to the
transmitting antenna (source), the EM fields from hand-held radio sources
(transceivers) are of special concern. It is possible, unintentionally, to bring high
levels of EM energy very close to the powered Powerchair's control system while
using these devices. This can affect powered Powerchair movement and braking.
Therefore, the warnings listed below are recommended to prevent possible
interference with the control system of the powered Powerchair.
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