33
GUIDELINES AND MANUFACTURER' S STATEMENT-ELECTROMAGNETIC IMMUNITY
Anti-interference
measurement
IEC60601
Test Level
RFconduction
RF radiation
(charger)
RF radiation
(wheelchair)
3 Vrms
3 Vrms
150 kHz to
80 MHz
3 V/m
3 V/m
80 MHz to
1.0 GHz
20 V/m
20 V/m
26 MHz to
2.5 GHz
Recommended isolation distance
80 MHz to 800 MHz
800 MHz to 1.0GHz
d=
P0.2
d=
P0.4
d=
P1.2
d=
P1.2
d=
P2.3
26 MHz to 800 MHz
800 MHz to 2.5 GHz
Coincidence
level
Electromagnetic
environment-Guidelines
ISO7176
IEC60601
ISO7176
IEC60601
ISO7176
IEC60601
is expected to be used in the following specified electromag
netic environment, and the purchasers or users of NPL001
electric wheelchairs shall ensure that it is used in this electromagnetic environment
Note 1: at the frequency of 80MHz and 800MHz, the formula of higher frequency band
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.
Portable and mobile RF communi
cation equipment shall not be used
closer to any part of the electric
wheelchair, including cables, than
the recommended isolation dis
tance. The distance shall be calcu
lated by the formula corresponding
to the transmitter frequency.
Where P is the maximum output
rated power of the transmitter pro
vided by the transmitter manufactur
er, in watts (W), and d is the recom
mended isolation distance in meters
The field strength of the fixed RF
transmitter is determined by survey
ing the electromagnetic field A. in
each frequency range, B should be
lower than the coincidence level.
Interference may occur near equip
ment marked with the following
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