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III. EMI/RFI
Electromagnetic and Radio Frequency Interference (EMI/RFI)
Laboratory tests have shown that electromagnetic and radio frequency waves can have an adverse affect on the
performance of electrically-powered mobility vehicles. The interference can come from sources such as cellular
phones, mobile two-way radios (such as walkie-talkies), radio stations, TV stations, amateur radio (HAM) trans-
mitters, wireless computer links, microwave signals, paging transmitters, and medium-range mobile transceivers
used by emergency vehicles. In some cases, these waves can cause unintended movement or damage to the
control system. Every electrically-powered mobility vehicle has an immunity (or resistance) to EMI. The higher the
immunity level, the greater the protection against EMI. Currently, the highest achievable immunity level to EMI is
20 V/m (volts per meter).
PROHIBITED! To prevent unintended movement, turn off the power to the electrically-
powered mobility vehicle before using a cell phone, two-way radio, lap-top, or any other
type of radio transmitter. Avoid coming into close proximity of radio or TV stations.
WARNING! The addition of accessories or components to the electrically-powered mobility
vehicle can increase the susceptibility of the vehicle to EMI. Do not modify the PMV in any
way not authorized by Pride.
WARNING! The electrically-powered mobility vehicle itself can disturb the performance
of other electrical devices located nearby, such as alarm systems.
NOTE: This product has been tested and has passed at an immunity level of 20 V/m.
NOTE: For further information on EMI/RFI, go to www.pridemobility.com. If unintended motion or
brake release occurs, turn the PMV off as soon as it is safe to do so. Call Pride at 800-424-8205 to report
the incident.