Battery Chargers; Emi Warnings - Quickie QM-7 Series Service Manual

Health and Safety (cont.)
•
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
compliance to state laws. Contact your local authority for their
recommendations.

Battery Chargers

•
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 Warnings

•
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 the user 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 can, 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.
SUNRISE MEDICAL
Section 1
QM-7 SERIES SERVICE MANUAL JANUARY 2012
PAGE 1.5