AMYPOWER ALLTRACK R3 & R SERIES - Owner’s Manual (Rev. A)
6
WARNING
B. WHAT EFFECT CAN EMI HAVE?
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.
WARNING
C. SOURCES OF EMI
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
2. Medium-Range Mobile Transceivers:
NOTE: These devices can transmit signals while they are
on, even if they are not in use.
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:
Laptop computers (without phone or fax),
Cordless phones, TV sets or AM/FM radios, CD or tape
players.
WARNING
D.DISTANCE FROM THE SOURCE
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.
WARNING
E. IMMUNITY LEVEL
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 was found to be immune to at
least 20 V/m is: Amypower Alltrack 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 Group 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 Amypower Alltrack
and PG Drives 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.
WARNING
F. REPORT ALL SUSPECTED EMI INCIDENTS
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:
Amypower’s Customer Service Department at
(888) 453-0311
WARNING
G.EMI FROM CHAIR
The chair itself can disturb the performance of electro-
magnetic fields such as emitted by alarm systems of shops.
