Shoprider PHFW-1120 manual EMI Warning, Electromagnetic Interference EMI from Radio Wave Sources

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EMI WARNING

Electromagnetic Interference (EMI) from Radio Wave Sources

Powered electric chairs may be susceptible to electromagnetic interference, which is a kind of interfering electromagnetic energy (EMI) emitted from sources such as radio stations, TV stations, amateur radio (HAM) transmitters, two-way radios and cellular phones. The interference (from radio wave sources) can cause the power chairs to release its brakes, move by itself or move in unintended directions. It can also permanently damage the powered chair’s control system.

The sources of radiated EMI can be broadly classified into three types:

1.Hand-held portable transceivers (transmitters-receivers) with the antenna mounted directly on the transmitting unit. Examples include: citizens band (CB) radios, “walkie talkies”, security, fire and police transceivers, cellular telephones and other personal communication devices

NOTE: Some cellular telephones and similar devices transmit signals while they are ON, even when not being used.

2.Medium-Range mobile transceivers, such as those used in police cars, fire trucks, ambulances and taxis. These usually have the antenna mounted on the outside of the vehicle.

3.Long-Range transmitters and transceivers, such as commercial broadcast transmitters (radio and TV broadcast antenna towers) and amateur (HAM) radios.

NOTE: Other types of hand-held devices, such as cordless phones, laptop computers, AM/FM radios, TV sets, CD players, cassette players and small appliances such as electric shavers and hair dryers, so far, as we know, are not likely to cause problems to your power chair.

6/25/2004

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Contents Folding Power Chair Table of Contents Introduction EMI Warning Electromagnetic Interference EMI from Radio Wave SourcesPowered Chair Electromagnetic Interference EMI Safety Instructions Important Notes Feature Guide Using the Shoprider Folding Power Chair Getting To Know The Joystick Controller VSIDrive/Freewheel Mechanism Transferring Folding the Wheelchair Armrests Swing-Away, Detachable Leg RestsNegotiating Obstacles Ramps, Slopes and CambersLooking After Your Power Chair Lubrication and General MaintenanceTires UpholsteryBatteries & Battery Charging Battery Charging ProcedureTroubleshooting Possible Fault25/2004 Specification Quarterly Inspection FPC-11 Battery Installation PHFW-1118/PHFW-1120 25/2004 25/2004 Disclaimer