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©2006 Sunrise Medical
INTRODUCTION
Remove personal items of jewelry, such as rings, watches, chains etc. •
before working on batteries. Such items could cause short circuits resulting
in serious burns.
Batteries are constructed of heavy materials. Therefore moving batteries •
requires appropriate lifting techniques. Safety footwear should also be worn.
In addition, disposal of old batteries requires correct procedures. Contact
your local authority for their recommendations.
Remember battery chargers are connected to household current.•
Always observe all guidelines and laws relating to electrical equipment.•
Never operate the battery charger in wet or damp conditions.•
If you think that the charger has been exposed to water or excessive •
dampness, do not use it. Return the unit to the dealer/supplier for inspection/
replacement.
If you think the battery charger is defective or is visibly damaged, return the •
unit to the dealer/supplier for inspection.
EMI means electromagnetic (EM) interference (I). EMI comes from radio •
wave sources, such as radio transmitters and transceivers. A “transceiver” is
a device that both sends and receives radio wave signals.)
There are a number of sources of intense EMI in our daily environment. •
Some of these are obvious and easy to avoid. Others are not, and we may
not be able to avoid them.
Powered wheelchairs, although tested in accordance with EMC guidelines, •
may be susceptible to electromagnetic interference (EMI) emitted from
sources such as, radio stations, TV stations, amateur radio (HAM) transmitters,
two-way radios, and cellular phones.
EMI can also be produced by conducted sources or electro-static discharge •
(ESD).
What effect can EMI have?
1. EMI, without warning, can cause a power chair to:
• Release its electronic brakes
• Move by itself
• Move in unintended directions.
• If any of these occur, severe injury could result.
2. EMI can damage the control system of a power chair, resulting in a safety
hazard and/or costly repairs.
Battery Chargers
EMI Warnings
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