Operation Manual

POWER SEATING OWNERS MANUAL

Powered Wheelchair 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 very close to the powered wheelchair’s control system while using these

devices. This can affect powered wheelchair movement and braking. Therefore, the

warnings listed are recommended to prevent possible interference with the control system

of the powered wheelchair.

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

wheelchairs and motorized scooters. Following the warnings listed below should reduce

the chance of unintended brake release or powered wheelchair movement which could

result in serious injury.

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 powered wheelchair 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 powered wheelchair OFF as

soon as it is safe;

4) Be aware that adding accessories or components, or modifying the powered

wheelchair, may make it more susceptible to EMI (Note: There is no easy way to

evaluate their effect on the overall immunity of the powered wheelchair); and

5) Report all incidents of unintended movement or brake release to the powered

wheelchair manufacturer, 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) The immunity level of this product is not known.

EMC Part: 19254300 ● Rev. 03 ● 07/28/06