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
GUIDELINES AND MANUFACTURER'S STATEMENT-ELECTROMAGNETIC IMMUNITY
Coincidence
level
Electromagnetic
environment-Guidelines
ISO7176
IEC60601
ISO7176
IEC60601
ISO7176
IEC60601
D09/ D09B/ D09C/ D09D/ D09E Power Wheelchair is expected to be used in the fol-
lowing specified electromagnetic environment, and the purchasers or users of
NPL001、NPL002、NPL003 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
is adopted.
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
(m).
B
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
symbols.
36
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