72
73
Table 3
Guidance and manufacturer’s declaration – electromagnetic immunity
The device is intended for use in the electromagnetic environment specified below. The customer or the user of
the device should assure that it is used in such an environment.
Immunity
test
EC
60601
Test
level
Compliance
level
Electromagnetic environment - guidance
Conducted
RF IEC
61000-4-6
150
kHz to
80 MHz:
3 Vrms
6Vrms (in
ISM and
amateur
radio
bands)
80% Am
at 1kHz
150 kHz to
80 MHz:
3 Vrms
6Vrms (in
ISM and
amateur
radio bands)
80% Am at
1kHz
Portable and mobile RF communications equipment should be
used no closer to any part of the device, including cables, than the
recommended separation distance calculated from the equation
appropriate for the frequency of the transmitter.
Recommended separation distances:
d=0.35
P
;
d=1.2
P
Radiated RF
IEC 61000-
4-3
10V/m,
80% Am
at 1kHz
10V/m, 80%
Am
at 1kHz
80 MHz to 800
MHz: d=1.2
P
800 MHz to 2.7
GHz: d=2.3
P
where,
“P”
is the maximum output power
rating of the transmitter in watts (W)
according to the transmitter manufacturer,
d
is the recommended separation distance
in meters (m). Field strengths from fixed
RF transmitters, as determined by an
electromagnetic site survey,
“a”
should
be less than the compliance level in each
frequency range.
“b”
Interference may occur in the vicinity
of equipment marked with the following
symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption
and reflection from structures, objects and people.
“a”
- Field strengths from fixed transmitters, such as base stations for radio (cellular / cordless) telephones and
land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically
with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site
survey should be considered. If the measured field strength in the location in which the device is used exceeds
the applicable RF compliance level above, the device should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relocating the device.
“b”
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3V/m.
