Z100080
ZX-
1 Operator’s Manual
Spinergy/SMP
Page 30
ELECTROMAGNETIC AND RADIO FREQUENCY INTERFERENCE
EMI AND RFI FACTORS
All electrically powered vehicles, including
the ZX-1 are susceptible to Electromagnetic
Interference/Radio Frequency Interference
(EMI/RFI). This interference could result in
abnormal, unintended ZX-1 movement.
There are a number of sources of relatively
intense electromagnetic fields in the
everyday environment. Some of these
sources are obvi- ous and easy to avoid.
Others are not apparent and exposure is
unavoidable. The sources of radiated EMI
can be broadly classified into three types:
1.
Hand-held portable transceivers
(transmit- ters-receivers) with the
antenna mounted directly on the
transmitting unit. Examples include:
citizens band (CB) radios,
“walkie
talkie,”
security, fire and police
transceiv- ers, cellular telephones and
other personal communication devices.
NOTE
•
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,
ambu- lance and taxis. These usually
have the antenna mounted on the outside
of the vehicles.
3.
Long-range transmitters and
transceivers such as commercial
broadcast transmitters (radio and TV
broadcast antennas towers) and amateur
(HAM) radios.
NOTE
•
Other types of hand-held devices, such
as cordless phones, laptop computers,
AM/FM radios, TV sets, CD players,
cassette players
and small appliances, such as electric
shav- ers and hair dryers (so far as we
know) are not likely to cause EMI
problems to your ZX-1. Every power
wheelchair or power- assist device can
resist EMI up to a certain level, also
known as its
“immunity
level”.
The
higher the immunity level, the less the
device is at risk of interference. An
immu- nity level of 20V/m is understood
to provide sufficient protection from the
sources encountered on a daily
basis.”
In some cases, these waves can cause unin-
tended movement or damage to the control
system. Every ZX-1 has a built-in
immunity (or resistance) to EMI. The
higher the immu- nity level, the greater the
protection against EMI. The ZX-1 has an
immunity level of 20 V/m.
WARNING
•
Avoid close proximity to EMI-prone
radio and TV stations. Failure to
comply could cause injury to operator
during inad- vertent movement.
•
Do not modify ZX-1 without express
authorization from Spinergy. Failure to
comply can cause injury to operator and
increase susceptibility of the ZX-1 to
EMI.
•
Do not situate ZX-1 in a position of
dan- ger where possible EMI could
cause unin- tended movement. Failure
to comply could cause injury to
operator or damage to equipment
during unintended movement or brake
release.
