Revision 15.00 / LB-0028
–
Cerebus Instructions for Use
26
Appendix 2
Electromagnetic Immunity
The Cerebus System is intended for use in the electromagnetic environment specified below. The
customer or the user of the Cerebus system should assure that it is used in such an environment.
Guidance and manufacturer’s declaration –
electromagnetic immunity
–
for all EQUIPMENT and SYSTEMS
that are not LIFE-SUPPORTING (refer to 60601-1-2 Table 204).
Immunity test
IEC 60601 test
level
Compliance
level
Electromagnetic environment guidance
Conducted RF
IEC61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80
MHz
3 V/m
80 MHz to 2,5
GHz
3 Vrms
3 V/m
Portable and mobile RF communications equipment should be used
no closer to any part of the Cerebus system, including cables, than
the recommended separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2.5 GHz
where P is the maximum output power rating of the transmitter
in watts (W) according to the transmitter manufacturer and 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 Cerebus system is used exceeds the applicable RF compliance level above, the
Cerebus system should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as re-orienting or relocating the Cerebus system.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3V/m.
P
d
2
.
1
P
d
2
.
1
P
d
3
.
2
