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Invacare® Carroll CS Series™
3.2 EMI Information
CAUTION!
Risk of Damage
To avoid product damage from electromagnetic
interference:
– It is very important that you read this
information regarding the possible effects of
electromagnetic interference on this product.
This product may be susceptible to electromagnetic
interference (EMI), which is interfering electromagnetic
energy (EM) emitted from sources such as radio stations, TV
stations, amateur radio (HAM) transmitters, two way radios,
and cellular phones. The interference (from radio wave
sources) can cause the powered bed to release its brakes,
move by itself, or move in unintended directions. It can also
permanently damage the powered bed's control system.
The intensity of the interfering EM energy can be measured
in volts per meter (V/m). Each powered bed can resist EMI
up to a certain intensity. This is called its “immunity level.”
The higher the immunity level, the greater the protection.
At this time, current technology is capable of achieving at
least a 20 V/m immunity level, which would provide useful
protection from the more common sources of radiated EMI.
There are a number of sources of relatively intense
electromagnetic fields in the everyday environment. Some
of these sources are obvious and easy to avoid. Others are
not apparent and exposure is unavoidable. However, we
believe that by following the warnings listed below, your
risk to EMI will be minimized.
The sources of radiated EMI can be broadly classified into
three types:
1.
Handheld Portable transceivers (transmittersreceivers
with the antenna mounted directly on the transmitting
unit. Examples include: citizens band (CB) radios,
“walkie talkie”, security, fire and police transceivers,
cellular telephones, and other personal communication
devices).
Some cellular telephones and similar devices
transmit signals while they are ON, even when
not being used.
2.
Medium range mobile transceivers, such as those used
in police cars, fire trucks, ambulances and taxis. These
usually have the antenna mounted on the outside of
the vehicle; and
3.
Long range transmitters and transceivers, such as
commercial broadcast transmitters (radio and TV
broadcast antenna towers) and amateur (HAM) radios.
Other types of handheld devices, such as
cordless phones, laptop computers, AM/FM
radios, TV sets, CD players, cassette players, and
small appliances, such as electric shavers and
hair dryers, so far as we know, are not likely to
cause EMI problems to this product.
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