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GENERAL GUIDELINES | PROCEDURE 1 |
WARNING
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
Electromagnetic interference (EMI) from sources such as radio and TV stations, amateur radio (HAM) transmitters,
1)Do not operate
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 MCC MKIV controller for this application has an unknown immunity level.
Modification of any kind to the electronics of this wheelchair as manufactured by Invacare may adversely affect the RFI immunity levels.
G E N E R A L
G U I D E L I N E S
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