47
Table 3
Guidance and manufacturer’s declaration – electromagnetic immunity-for EQUIPMENT and SYSTEM
that are not LIFE-SUPPORTING
Vital Signs Monitor is intended for use in the electromagnetic environment specified below. The customer or
the user of Vital Signs Monitor should assure that it is used in such an electromagnetic environment
IMMUNITY test
IEC 60601 test
level
Compliance
level
Electromagnetic environment -
guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz
to 80 MHz
3 V/m
80 MHz
to 2.5 GHz
3V
3 V/m
Portable and mobile RF communications
equipment should be used no closer to
any part of Vital Signs Monitor, including
cables, than the recommended separation
distance calculated from the equation ap-
plicable to the frequency of the transmitter.
Recommended separation distance
d
= 1.2
√P
d
= 1.2
√P
80MHz to 800MHz
d
= 2.3
√P
800MHz to 2.5GHz
Where
P
is the maximum output power ra-
ting of the transmitter in watts (W) accor-
ding to the transmitter manufacturer and d
is the recommended separation distance
in metres (m).
a
Field strengths from fixed RF transmitters,
as determined by an electromagnetic site
survey ,a should be less than the com-
pliance 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 ab-
sorption 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, and
electromagnetic site survey should be considered. If the measured field strength in the location in which Vital
Signs Monitor is used exceeds the applicable RF compliance level above, Vital Signs Monitor should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be ne-
cessary, such as re-orienting or relocating Vital Signs Monitor.
b:
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3V/m.