E&J GF0600059REVB06 manual Powered Wheelchair Electromagnetic Interference EMI, EMI Warnings

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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 brak- ing. Therefore, the warnings that follow 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. Fol- lowing the warnings listed below should reduce the chance of unintended 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 cel- lular 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 wheel- chair 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 powered wheelchair).

Warning: Report all incidence of unintended movement or brake release to Graham- Field, 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 powered wheelchair model is listed on page 7.

Be aware that using different components, adding accessories, or modifying the powered wheelchair may change the immunity level.

 

 

 



GF0600059RevB06, November 2006

Metro Power III Owner’s Manual

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Contents Metro Power Contents Introduction II Safety Precautions MaintenanceGF0600059RevB06, November GF0600059RevB06, November Electromagnetic interference EMI from radio wave sources Important Information Powered Wheelchair Electromagnetic Interference EMIEMI Warnings III Handling Tips BalanceRamps and Inclines Reaching / bending forward or sidewardReaching / bending backward Ascent DescentIV Getting Started Power Drive System Motor and battery cablesIntegral controller JoystickON/OFF switch Battery gaugeMaximum speed / profile indicator Horn buttonOperating Instructions BatteriesVI Adjustments Arms Flip arm backAttach footrest Adjust footrest lengthFootrest-detachable, swingaway Remove footrest Adjust legrest elevation Attach elevating legrestAdjust elevating legrest footplate extension length Adjust elevating legrest pad position up or downAdjust wheel locks Guidelines to extending battery life VII BatteriesBattery Charger Battery Charger Features Battery Charger Interface Battery charger back panelAC voltage switch Line connectorAC connector Battery charger front panelBattery Charger Safety Charging the Batteries Remove and Install Batteries Remove Batteries Install Batteries Metro Power Battery connectionsBattery maintenance Clean batteries Clean battery terminalsViii Maintenance Do-it-yourself MaintenanceController Maintenance General List of ToolsCharge batteries Control system daily check JoystickConnectors Joystick bootCables MountingClean & check upholstery Clean wheelchairCheck tires Check wheel lock engagementInspect motor brushes Check bearingsIX Troubleshooting Troubleshooting, Power DriveTroubleshooting, integral controller General diagnostic guideBattery gauge diagnostic guide Battery gauge diagnostic guide tableBattery System Gauge Check / Action Lights Troubleshooting, battery charger Front output fuse panelSYMPTOMCHECK-ACTION Transporting the Metro Power ReassemblyXI Limited Warranty Warranty PeriodsGF0600059RevB06, November XII Index GF0600059RevB06, November

GF0600059REVB06 specifications

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