34
GUIDELINES AND MANUFACTURER' S STATEMENT-ELECTROMAGNETIC IMMUNITY
d=
P1.2
d=
P1.2
d=
P2.3
d=
P0.2
d=
P0.4
a
b
0.01 0.12 0.12 0.23 0.02 0.04
0.1 0 .38 0.38 0.73 0.06 0.13
1 1.2 1.2 2.3 0.2 0.4
10
3.8 3.8 7.3 0.63 1.26
100 12 12 23 2 4
Isolation distance corresponding to different freq uencies of
transmitter/m
Rated
maximum
output
power of
transmit-
ter/W
150 kHz
～ 80
MHz－
80MHz ～ 800
MH（Charger）
800 MHz ～ 2.5
GHz（Charger）
26MHz ～ 800
MHz
（Wheelchair）
800 MHz ～
2.5 GHz
（Wheelchair）
If the fixed transmitting airport is strong, such as the base station of wireless (cellular
/ cordless) telephone and ground mobile radio, amateur radio, am (amplitude modu
lation) and FM (frequency modulation) radio broadcast and television broadcast, and
the field strength of the place where NPL001
wheelchairs are located is higher than the RF coincidence level of the above applica
tion, then the electric wheelchair should be observed to verify It can operate normal
ly. If abnormal performance is observed, supplementary measures may be neces
sary, such as reorientation or repositioning of the electric wheelchair.
is expected to be used in an electromagnetic environment
where radiated RF disturbances are controlled. According to the maximum output
power of communication equipment, the buyer or user of electric wheelchair can pre
vent electromagnetic interference by maintaining the minimum distance between por
table and mobile RF communication equipment (transmitter) and electric wheelchair.
For the rated maximum output power of the transmitter not listed in the above table, the
recommended isolation distance D, in meters (m), can be determined by the formula in
the corresponding transmitter frequency column, where P is the maximum output rated
power of the transmitter provided by the transmitter manufacturer, in watt (W).
Note 1: At 80 MHz and 800 MHz frequencies, the formula for the higher frequency
Note 2: These guidelines may not be suitable for all cases where electromagnetic prop
agation is affected by absorption and reflection of buildings, objects and human bodies.
Recommended separation distance between portable and mobile RF communication
equipment and electric wheelchair.
The field strength should be less than 3 V / m in the whole frequency range of 150
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