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Siemens AG Healthcare Sector 11/12 Guidance and manufacturer’s declaration EMC
Guidance and manufacturer’s declaration — electromagnetic
immunity
The MR system is intended for use in the electromagnetic environment specified below.
The customer or the user of the MR system should assure that it is used in such an environ-
ment.
Immunity tests
IEC 60601 test
level Compliance
level
Electromagnetic environment — guidance
Conducted RF inter-
ference
IEC 61000-4-6 3 V
rms
150 kHz to 80 MHz
3 V
rms
The MR system must be used only in a
shielded location with a minimum RF shield-
ing effectiveness and, for each cable that
enters the shielded location, a minimum RF fil-
ter attenuation of 80 dB from 10 MHz to
20 MHz, 100 dB from 20 MHz to 80 MHz and
80 dB from 80 MHz to 100 MHz. (The mini-
mum at 20 MHz is 100 dB and the minimum at
80 MHz is 80 dB.)
Field strengths outside the shielded location
from fixed RF transmitters, as determined by
an electromagnetic site survey, should be less
than 3 V/m
1
.
Interference may occur in the vicinity of equip-
ment marked with the following symbol:
Radiated RF inter-
ference
IEC 61000-4-3 3 V/m
80 MHz to 2.5 GHz 3 V/m
Note 1: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
Note 2: It is essential that the actual shielding effectiveness and filter attenuation of the shielded loca-
tion be verified to assure that they meet the minimum specification.
1. 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 mea-
sured field strength outside the shielded location in which the MR system is used exceeds 3 V/m, the MR system should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as
relocating the MR system or using a shielded location with a higher RF shielding effectiveness and filter attenuation.