B. WHAT EFFECT CAN EMI HAVE?
WARNING
1. EMI can cause your chair, without warning, to:
• Release its brakes
• Move by itself
• Move in unintended directions
If any of these occurs, it could result in severe injury to you
or others.
2. EMI can damage the control system of your chair. This could
create a safety hazard, and lead to costly repairs.
C. SOURCES OF EMI
WARNING
The sources of EMI fall into three broad types:
1. Hand-Held Transceivers:
The antenna is usually mounted directly on the unit. These include:
• Citizens band (CB) radios
• “Walkie-talkies”
• Security, fire and police radios
• Cellular phones
• Lap-top computers with phone or fax
• Other personal communication devices
Q-NOTE- These devices can transmit signals while they are on,
even if not in use.
2
. Medium-Range Mobile Transceivers:
These include two-way radios used in police cars, fire trucks,
ambulances and taxi cabs. The antenna is usually mounted on the
outside of the vehicle.
3.Long-Range Transceivers:
These include commercial radio and TV broadcast antenna towers
and amateur (HAM) radios.
NOTE-
The following are not likely to cause EMI problems: Lap-
top computers (without phone or fax), Cordless phones, TV sets
or AM/FM radios, CD or tape players.
D.DISTANCE FROM THE SOURCE
WARNING
EM energy rapidly becomes more intense as you get closer to the
source. For this reason, EMI from hand-held devices is of special
concern.
(See C.1 above)
A person using one of these devices can
bring high levels of EM energy very close to your chair without
you knowing it.
E. IMMUNITY LEVEL
WARNING
1. The level of EM is measured in volts per meter (V/m). Every
power wheelchair can resist EMI up to a certain level. This is
called its “immunity level”.
2. The higher the immunity level, the less the risk of EMI. It is
believed that a 20 V/m immunity level will protect the power
wheelchair user from the more common sources of radio
waves.
3. The configuration tested and found to be immune to at least
20 V/m is: Quickie Xplore power wheelchair with a right-
hand mounted P & G remote joystick system, 18" seat
width, 18" seat depth, dual post height adjustable armrests,
fixed tapered legrests with one piece solid footplate, and Gp
24 gel cell batteries.
4. The following specialty input devices have an unknown effect on
the immunity level because they have not been tested with the
Quickie Xplore and P & G control system:
• Breath Control
• Star Board
• Proportional Head
• Proximity Head Array
Control
• Wafer Board
• Tri-Switch Head Array
• Zero Touch Switch
• Proportional Mini-
• Penta Switch
Joystick/Chin Control
• 4-Zero Touch Switch
• Heavy Duty Switched
• Plate Switch
Joystick
• 5-Zero Touch Switch
• Buddy Button
• Soft Switch
• Treadle Switch
• Disc Switch
• Micro Light
• Grasp Switch
• Ribbon Switch
• Wobble Switch
WARNING
Individuals with physical limitations requiring the use of
a specialty control input device known not to be
immune to 20V/m, or not known, should exercise extra
care around known sources of EMI.
WARNING
There is no way to know the effect on EMI if you add
accessories or modify this chair. Any change to your
chair may increase the risk of EMI. Parts not specifically
tested or parts from other suppliers have unknown EMI
properties.
F. REPORT ALL SUSPECTED EMI INCIDENTS
WARNING
You should promptly report any unintended movement or
brake release. Be sure to indicate whether there was a radio
wave source near your chair at the time. Contact: Sunrise
Medical, Customer Service Department at (800) 263-3390
G.EMI FROM CHAIR
WARNING
The chair itself can disturb the performance of electro-
magnetic fields such as emitted by alarm systems of shops.
Quickie
Xplore
Owner’s
Manual
Rev.
B
6.
