
Liberator Owner’s Manual – Model # SM8500 L Revised 08/26/2016
9
EMI/RFI
The rapid development of electronics, especially in the area of communications, has
saturated our environment with electromagnetic (radio) waves that are emitted by
television transmitters, cellular phones, citizen’s band radios (CBs), amateur radios (ham
radios), wireless computer links, microwave transmitters, paging transmitters,
etc. These
electromagnetic (EM) waves are invisible and increase in strength the closer
one gets to
the source of transmission. When these energy waves act upon electrical
devices and
cause them to malfunction or to function in an erratic or uncontrolled manner, they are
referred to as Electromagnetic Interference (EMI) or Radio Frequency Interference (RFI).
EMI/RFI AND YOUR Liberator™ with Solar Companion
All electrically powered vehicles, including power chairs are susceptible to EMI/RFI.
This
interference could result in abnormal, unintended movement of a power
wheelchair.
The FDA has determined that each make and model of power chair can resist EMI/RFI to
a certain level. The higher the level of immunity, the greater the degree of protection
from
EMI/RFI measured in volts per meter (V/m). The FDA has also determined that current
technology is capable of providing 20 V/m of immunity to EMI/RFI, which
would provide
useful protection against common sources of interference.
Based on that determination, the FDA has written to the manufacturers of power
wheelchairs and asked them to test their new products to be certain that they provide a
reasonable degree of immunity to EMI/RFI. The FDA suggests that power chairs should
have an immunity level of 20 V/m.
The immunity level of the Liberator™ with Solar Companion is 20 V/m.
EMI/RFI RECOMMENDATIONS
Do not turn on or use hand-held personal electronic communication devices such as
cellular phones, walkie-talkies, and CB radios while your power chair is turned on.
Be aware of any nearby transmitters (radio, television, microwave, etc.) on your in-
tended route and avoid operating your chair close to any of those transmitters.
Turn off the power if your Liberator™ is going to be in a stationary position for any
length of time.
Be aware that adding accessories or components or modifying your power chair
may
make it more susceptible to EMI/RFI.
If unintended movement or brake release occurs, turn your power chair off as soon as
it is safe to do so.
Report all incidents of unintended movement or brake failure to your Liberator
representative or to Solar Mobility LLC at (509) 851-3611.
Turn off your power chair as soon as it is safely possible if
unintended or uncontrollable motion occurs or if unintended brake release
occurs.