Sterling Power Products Pearl - Manual (Page 12)

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CAUTION: IT IS VERY IMPORTANT THAT YOU READ THIS
INFORMATION REGARDING THE POSSIBLE EFFECTS
OF ELECTRO MAGNETIC CONTAMINATION, (EMC) ON
YOUR MOBILITY SCOOTER. SOMETIMES THIS EFFECT
IS ALSO KNOWN AS ELECTRO MAGNETIC
INTERFERENCE, (EMI).
EMC, (EMI), FROM RADIO-WAVE SOURCES.
Mobility scooters may be susceptible to EMC, which is interference from
electromagnetic energy, (EM), emitted from sources such as radio
stations, TV stations, amateur (HAM) radio transmitters, two way radios
and mobile phones. The interference, (from radio sources), can cause the
mobility scooter to release it’s brakes, move by itself, or move in an
unintended way. Permanent damage can also be done to the mobility
scooters control system.
The intensity of the interfering EM energy can be measured in volts per
meter, (V/m.).
Each mobility scooter can resist EMC up to a certain intensity.
This is known as the scooters “immunity level”.
The higher the immunity level, the greater the protection.
Current technology offers useful protection of at least 20 V/m. which
provides protection from the more common sources of radiated EMC.
There are a number of relatively strong electromagnetic fields present in
the everyday environment. Most of these sources are obvious and easy
to avoid, others are not so obvious and can be unavoidable.
By following the warnings listed, your risk of exposure to EMC will be
minimised.
EMC sources can be broadly classified into three types;
1. Hand-held portable transceivers, (transmitter-receivers with on-board
antenna). Examples are Walkie-Talkie, CB Radio, security, emergency
services, Mobile phones. Note that some cellular phones can transmit
signals while they are switched on but not being used.
2. Medium range mobile transmitters such as those used on emergency
services vehicles, taxis etc. These usually have antennas mounted on
the outside of the vehicle.
EMC (EMI) WARNINGS