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CAUTION!
Electromagnetic radio waves become more intense as you get closer to the source. For
this reason, extra caution should be exercised around portable hand-held devices. A person using one
of these devices can unintentionally bring high levels of EM energy close to your wheelchair’s control
system, which can affect powered wheelchair movement and braking.
Modification of any kind to the electronics of the modular power positioning system as manufactured by
Motion Concepts may adversely affect the radio frequency interference immunity (RFI) levels.
Motion Concepts does not provide a Battery Charger with our modular power positioning systems.
Use only the approved and tested battery charger provided by the wheelchair base manufacturer with
your Motion Concepts modular power positioning system.
Adding additional input devices, such as specialty controls (e.g.; sip ’n puff, head arrays), proportional
controls, and/or switch controls to your powered wheelchair system can affect the immunity level of the
powered wheelchair. Parts not specifically tested or parts from other suppliers may increase the risk
of EMI. Please refer to the EMI prevention recommendations and warnings provided in
section 9.1.5
IMPORTANT!
The intensity of the interfering EM energy is measured in volts per meter (V/m). Each
powered wheelchair system can resist EMI up to a certain intensity. This is called its "immunity level". At this
time, an immunity level of 20 V/m is recognized as a generally achievable and useful immunity level to protect
against most common sources of radiated EMI. The higher the immunity level, the greater the protection.
9.0
9.0
ELECTRO-MAGNETIC INTERFERENCE (EMI) INFORMATION
ELECTRO-MAGNETIC INTERFERENCE (EMI) INFORMATION
iii.
Long Range Transmitters and Transceivers-
such as commercial broadcast transmitters (radio
and TV broadcast antenna towers) and amateur (HAM) radios.
NOTE: The following devices are not likely to cause EMI problems to your powered wheelchair:
Cordless phones, laptop computers (without phone/fax), AM/FM radios, TV sets, CD players, and small
appliances, such as electric shavers and hair dryers.
9.1.3 What are the sources of EMI?
(...cont’d)
9.1.4 Immunity Levels
WARNING! Increased Risk of EMI/RFI
The following Motion Concepts MPPS configuration was tested and found to be immune to at least 20 V/m:
18” Seat Width, 18” Seat Depth, with tilt, elevate, recline and power LNX center mount legrest with a one
piece footplate. The power positioning system was configured with a multi-function M-Series (M610R) Seat
Control, M270 Remote Attendant Control and 8-Way Switch control, in combination with an RNET base
controller, right-hand mounted RNET LED remote joystick and GP 34 gel cell batteries.
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WARNING! EMI from the Wheelchair
Operation of your powered wheelchair and/or power positioning system can potentially disturb the performance
other electro-magnetic fields, such as those emitted by the alarm systems of shops.
WARNING! Risk of Serious Personal Injury and Damage.
The following warnings are recommended to prevent the risk of serious personal injury and to
prevent possible interference with the control system of the powered wheelchair
.
9.1.5 Recommendations to reduce the risk of EM interference with your powered wheelchair
Do not turn on personal communications devices, such as mobile phones, or operate hand held
transceivers (transmitters- receivers), such as citizens band (CB) radios, while the powered wheelchair
is turned ON.
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Summary of Contents for ULTRA-LOW MAXX UPFRONT MPPS
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