Issue date
：
2020/3/16
－
25
－
Electromagnetic immunity for non-life-supporting ME equipment and ME systems
Guidance and manufacturer’s declaration – electromagnetic immunity
The microscope is intended for use in the electromagnetic environment specified below. The
customer or the user of the microscope should assure that it is used in such an environment.
IMMUNITY
test
IEC 60601
test level
Compliance
level
Electromagnetic environment
–
guidance
Conducted
RF
EN
61000-4-6
Radiated
RF
IEC
61000-4-3
3 Vrms
150 kHz~80 MHz
3 V/m
80 MHz~2.5 GHz
3 Vrms
3V/m
Portable
and mobile RF
communications
equipment
should be used no closer to any part of the
microscope, including cables, than
the
recommended
separation
distance
calculated
from the equation applicable to the frequency of
the transmitter.
Recommended separation distance
d
=1.2
P
d
=1.2
P
80 MHz~800 MHz
d
=2.3
P
800 MHz~2.5 GHz
where P is the output power rating of the
transmitter in watts (W) according to the
transmitter manufacturer's specifications and
d is the recommended safety distance in meters
(m).
Field strengths from stationary RF transmitters,
as determined by a site survey
a
, should
be less than the compliance level in all frequency
ranges.
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 of stationary transmitters such as base stations for mobile telephones and mobile
land radio equipment, amateur radio stations, AM and FM radio broadcast and TV broadcast
transmitters cannot be theoretically predicted accurately. To assess the electromagnetic
environment with respect to stationary RF transmitters, a site study of the electromagnetic
phenomena should be considered. If the measured field strength in the location where the device is
used exceeds the compliance levels indicated above, the device should be monitored to verify
normal operation. If abnormal performance is observed, additional measures may be necessary,
such as re-orienting or relocating the ME equipment or ME system.
b Field strengths should be less than 3 V/m over the frequency range from 150 kHz to 80 MHz.
