Immunity test
standard
IEC 60601
test level
Compliance
level
Electromagnetic environment – guidance
Power frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
3 A/m
3 A/m
Power frequency magnetic fields should be at levels
characteristic of a typical location in a typical commer-
cial or hospital environment.
Immunity test
standard
IEC 60601
test level
Compliance
level
Recommended separation distance c
Portable and mobile RF communications equipment
should be used no closer to any part of the Veterinary Line
product, including cables, than the recommended
separation distance calculated from the equation applicable
to the frequency of the transmitter.
Recommended separation distance
.
Conducted RF
IEC 61000-4-6W
3 V
rms
150 kHz to 80 MHz
3 V
rms
150 kHz to 80 MHz
d = 1.2
P
150 kHz to 80 MHz
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2.5 GHz
3 V/m
80 MHz to 2.7 GHz
d = 1.2
P
80 MHz to 800 MHz
d = 2.3
P
800 MHz bis 2.5 GHz
Where
P
is the maximum output power rating of the trans-
mitter in watts (W) according to the transmitter manufacturer
and
d
is the recommended separation distance in metres (m).
Field strengths from fixed RF transmitters, as determined by
an electromagnetic site survey:
should be less than the compliance level in each
frequency range.
a
Interference may occur in the vicinity of equipment
marked with the following symbol:
b
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 Veterinary Line product is
used exceeds the applicable RF compliance level above, the BEMER Veterinary Line product should
be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the Veterinary Line product.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Use of the BEMER Veterinary Line devices near HF surgical equipment, trains, boats, planes, short wave
therapy equipment or inside the RF shielded room of MRI systems may cause degradation or loss of device
functionality due to EM disturbances.
188
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