Karma KS-242, Owner'S Manual, Page: 18 / 72

9
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Powered Vehicle 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 wave sources
(transceivers) are of special concern. It is possible to unintentionally bring high levels
of EM energy too close to the powered vehicle's control system while using these
devices. This can affect your powered vehicle's movement and braking. Therefore,
the warnings listed below are recommended to prevent possible interference with the
control system of the powered vehicle.
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Warnings
Electromagnetic interference (EMI) from sources such as radio and TV stations,
amateur radio (HAM) transmitters, two-way radios and cellular phones can affect
powered vehicles and motorized scooters. Following the warnings listed below should
reduce the chance of unintended brake release or powered vehicle movement, which
could result in serious injury.
1. Do not operate hand-held transceivers-receivers such as citizens band (CB)
radios or turn ON personal communication devices such as cellular phones, while
the powered vehicle is turned ON.
2. Be aware of nearby transmitters, such as radio or TV stations, and try to stay
away from them.
3. If unintended movement or brake release occurs, turn the powered vehicle OFF
as soon as it is safe.
4. Be aware that adding accessories/components or modifying the powered vehicle
may make it more susceptible to EMI. There is no easy way to evaluate their
effect on the overall immunity of the powered vehicle.
5. Report all incidents of unintended movement or brake release to your powered
vehicle dealer or KARMA, and note whether there was a source of EMI nearby.
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Important Information
1. 20 Volts per meter (V/m) is a generally achievable and useful immunity level
NOTE:
Other types of hand-held devices (cordless phones, laptop computers, AM/FM
radios, TV sets, CD players, cassette players, and small appliances such as electric
shavers and hair dryers, et cetera) so far as we know, are not likely to cause EMI
problems.