EMI Warning
SHOPRIDER® scooters as with all electric braked scooters may be susceptible to electromagnetic interference (EMI), which
is a kind of interfering electromagnetic energy (EM) emitted from sources such as radio stations, TV stations, amateur radio
(HAM) transmitters, two-way radio, and cellular phones. The interference (from radio wave sources) can cause the scooter
to release its brakes, move by itself, or move in unintended directions. (Forward or Reverse) It can also permanently damage
the scooter's control system but this would likely be at levels exceeding the Australian standard.
The intensity of the interfering EMI energy can be measured in volts per meter (V/M). Each SHOPRIDER® scooter can resist
up to a certain intensity. This is called “immunity level” the higher the immunity the greater the protection. At this time
current technology is capable of achieving 20V/M immunity level which will provide useful protection from the more common
sources of radiated EMI.
The sources of radiated EMI can be broadly classified into three types:
1.
Hand-held portable transceivers (transmitters-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.
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 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, and cassette players, and small appliances, such as electric shavers and hair dryers, so
far as we know, are not likely to cause problems to the scooter.
Scooter 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 to unintentionally bring high levels of EM energy very
close to the scooter's control system while using these devices. This can affect scooter movement and braking. Therefore, the
warnings listed below are recommended to prevent possible interference with the control system of the scooter.
WARNINGS
1.
Do not operate hand-held transceivers (transmitters-receivers), such as citizens band (CB) radios, or turn ON
personal communication devices, such as cellular phones, while the scooter is turned ON.
2.
Be aware of nearby transmitters, such as radio or TV stations, and try to avoid coming close to them.
3.
If unintended movement or brake release occurs, turn the scooter OFF as soon as it is safe.
4.
Be aware that adding accessories or components, or modifying the scooter may make it more susceptible.
Report all incidents of unintended movement or braking to your Shoprider® provider, and note whether there
are sources of EMI nearby. If your scooter does unexpectedly stop then turn the key off, Wait for a few seconds
and turn the key back on.
WARNING: Shoprider® Mobility Products is not responsible for damage or injury incurred due to improper and
unsafe use of our scooter.
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