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Everest Lite Owner's Manual
GF0600055RevA06, October 006
pOWEREd WHEELCHAIR ELECtROMAGnEtIC IntERFEREnCE (EMI)
Because EM energy rapidly becomes more intense as one moves closer to the transmit-
ting 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
very close to the powered wheelchair's control system while using these devices. This
can affect powered wheelchair movement and braking. Therefore, the warnings that fol-
low are recommended to prevent possible interference with the control system of the
powered wheelchair.
EMI WARnInGs
Electromagnetic interference (EMI) from sources such as radio and TV stations, amateur
radio (HAM) transmitters, two-way radios, and cellular telephones can affect powered
wheelchairs. Following the warnings listed below should reduce the chance of unintend-
ed brake release or powered wheelchair movement which could result in serious injury.
WARNING: Do not operate hand-held transceivers (transmitters-receivers), such as
citizens band (CB) radios, or turn on personal communication devices,
such as cellular telephones, while the powered wheelchair is turned on.
WARNING: Be aware of nearby transmitters, such as radio or TV stations, and try to
avoid coming close to them.
WARNING: If unintended movement or brake release occurs, turn the powered
wheelchair off as soon as it is safe.
WARNING: Be aware that adding accessories or components, or modifying the pow-
ered wheelchair, may make it more susceptible to EMI (Note: There is no
easy way to evaluate their effect on the overall immunity of the pow-
ered wheelchair).
WARNING: Report all incidence of unintended movement or brake release to Gra-
ham-Field Health Products, and note whether there is a source of EMI
nearby.
IMpORtAnt InFORMAtIOn
1) 20 volts per meter (V/m) is a generally achievable and useful immunity level against
EMI (as of May 1994) (the higher the level, the greater the protection);
2) This powered wheelchair model has an immunity level of 20 V/m.
Be aware that using different components, adding accessories, or modifying the powered
wheelchair may change the immunity level.
