932213 Rev. C
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E N G L I S H
V.
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 configurations tested and found to be immune to at least
20 V/m are:
a. Zippie Z-Bop power wheelchair with a right-hand
mounted Quickie controller, highback seat, flip-back arm-
rests, solid flip-up footplate and U1 gel cell batteries.
b. Zippie Z-Bop power wheelchair with a right-hand
mounted Quickie controller, highback seat, flip-back arm-
rests, solid flip-up footplate and 40Amh gel cell batteries.
4. The following specialty import devices have an unknown
effect on the immunity level because they have not been
tested on the Zippie Z-Bop with the Quickie controller:
•
Breath Control
•
Ribbon Switch
•
Disc Switch
•
Proportional Head Control
•
Proportional Mini-Joystick/Chin Control
•
Buddy Button
•
Micro Light
•
Penta Switch
•
Wobble Switch
•
ASL Head Array
•
HMC Mini-Joystick
•
Egg Switch
•
Switch-It head Array
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 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) 333-4000.
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) 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 energy 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”.
