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2.0 SAFETY
2.4 Safety: Electromagnetic radiation
WARNING!
Heed all warnings to reduce the risk of unintended movement:
1.
Beware of the danger from hand-held transceivers. Never turn on or use a
hand-held transceiver while power to the device is on. Use extra care if such
a device may be in use near the R20.
2.
Be aware of nearby radio or TV stations, and avoid coming close to them.
3.
If unintended movement occurs, turn the device off as soon as it is safe to
do so.
2.4.1. What is EMI?
WARNING!
1.
EMI means: electromagnetic (EM) interference (I). EMI comes from radio
wave sources such as radio transmitters and transceivers.
(A "transceiver" is a device that both sends and receives radio wave signals).
2.
There are a number of sources of intense EMI in one's daily environment.
Some of these are obvious and easy to avoid. Others are not, and may be
unavoidable.
3.
The device may be susceptible to Electromagnetic interference (EMI)
emitted from sources such as radio stations, TV stations, amateur radio
(HAM) transmitters, two way radios, and cellular phones.
4.
EMI can also be produced by conducted sources or electrostatic
discharge (ESD).
2.4.2. What eff ect can EMI have?
WARNING!
1.
EMI can cause the device, without warning, to:
a.
Move by itself.
If this occurs, it could result in severe injury to the attendant, the wheelchair
user, or others.
2.
EMI can damage the device. This could create a safety hazard, and lead to
costly repairs.
2.4.3. Sources of EMI
WARNING!
The sources of EMI fall into three broad types:
1.
Hand-Held Transceivers
The antenna is usually mounted directly on the unit. These include:
a.
Citizens band (CB) radios
b.
"Walkie-talkies"
c.
Security, fi re, and police radios
d.
Mobile phones
e.
Lap-top computers with phone or fax
f.
Other personal communication devices
g.
Electronic article surveillance systems
NOTE: These devices can transmit signals while they are on, even if not
in use.
2.
Medium-Range Mobile Transceivers
These include two-way radios used in police cars, fi re trucks, ambulances,
and taxi cabs. The antenna is usually mounted on the outside of the vehicle.
3.
Long-Range Transceivers
These include commercial radio and TV broadcast antenna towers and
amateur (HAM) radios.
NOTE - The following are not likely to cause EMI problems: Lap-top
computers (without phone or fax), Cordless phones, TV sets or AM/FM
radios, CD or tape players.
2.4.4. Distance from the source
WARNING!
Electro-magnetic energy rapidly becomes more intense as one gets closer to
the source. For this reason, EMI from hand-held devices is of special concern. A
person using one of these devices can bring high levels of EM energy very close to
the device without notice.
2.4.5 Immunity level
1.
The level of EM is measured in volts per meter (V/m). Every power assist
device can resist EMI up to a certain level. This is called its "immunity level".
2.
The higher the immunity level, the less the risk of EMI. It is believed that a 20
V/m immunity level will protect the device attendant and the wheelchair user
from the more common sources of radio waves.
3.
The common confi guration tested and found to be immune to at least 20
V/m is: Empulse R20 mounted to a Manual Wheelchair using lithium ion
batteries.
If there is any doubt that the device is not immune to 20V/m, extra care should be
taken around known sources of EMI.
There is no way to know the eff ect on EMI if accessories are added or if
modifi cations are made to the chair the device is mounted to. Any change to the
chair may increase the risk of EMI. Parts not specifi cally tested or parts from other
suppliers have unknown EMI properties.
2.4.6 Report all suspected EMI incidents
Promptly report any unintended movement. Ensure it is indicated whether there
was a radio wave source near the device at the time. Contact:
Sunrise Medical, Customer Service Department at (800) 333-4000.
2.4.7 EMI from device
The device itself can disturb the performance of electromagnetic fi elds such as
emitted by commercial and/or residential alarm systems.
2.5 Safety: Choking hazard
This mobility aid uses small parts which under certain circumstances may present a
choking hazard to young children.
2.6 Safety: Battery
Remove the battery only when the wheelchair or the device are on fl at, level
ground. This will help prevent either the wheelchair or the device from tipping.
Do not remove the batteries while the chair is on a lift table or on any other
elevated surface.
2.7 Safety: Lifting the device
Lift the device using the handle. Lifting the device from other parts may damage
the device or cause injury to the attendant and/or wheelchair user. (Fig 2.4)
5
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™
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Empulse
Empulse
R20
R20
General Manual
General Manual
WARNING!
WARNING!
WARNING!
WARNING!
WARNING!
DANGER!
DANGER!
WARNING!
Fig. 2.4
254717 Rev. A
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