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EMC information
Immunity tests
IEC 60601
test level
Compliance
level
Electromagnetic Environmental
guidelines
recommended
safety distance
Portable and mobile radio devices
should never be used at less than the
recommended safety distance from the
boso blood pressure measuring device,
including wiring. The safety distance
is calculated according to the relevant
equation for the transmitter frequency.
d = 1.2 P
HF conducted interference
in accordance with
IEC 61000-4-6
3 V
eff
150 kHz - 80 MHz
3 V
eff
HF radiated interference
in accordance with
IEC 61000-4-3
3 V /m
80 kHz - 2.5 GHz
3 V /m
d = 1.2 P for 80 MHz - 800 MHz
d = 2.3 P for 800 MHz - 2.5 GHz
Guidelines and manufacturer's declaration - electromagnetic emission
The boso blood pressure measuring device is intended to be operated in the electromagnetic environment indicated below.
The customer or user of the boso blood pressure measuring device should ensure that it is used in such an environment..
COMMENT 1: The higher value applies at 80 MHz and 800 MHz.
COMMENT 2: These guidelines may not be applicable in all situations. Electromagnetic waves are affected by absorption and reflection
from buildings, objects and people.
a The field strength of stationary transmitters, such as the base stations of mobile and cordless phones, amateur radio sets, AM and
FM radio and television transmitters cannot in theory be precisely determined in advance. A site investigation is recommended in order
to ascertain the electromagnetic environment arising from stationary HF transmitters. If the field strength determined at the site of the
boso blood pressure measuring device exceeds the compliance level referred to above, the boso blood pressure measuring device must
be monitored at each use site to ensure that it is working properly. If abnormal performance is observed, it may be necessary to take
additional steps such as reorienting or moving the boso blood pressure measuring device. b Field strength is less than 3 V/m over the
150 kHz to 80 MHz frequency range.
Recommended safety distances
between portable and mobile HF communication devices and the boso blood pressure measuring device. The boso blood pressure
measuring device is intended to be operated in an electromagnetic environment in which radiated HF interference is controlled. The
client or user of the boso blood pressure measuring device can help prevent electromagnetic interference by complying with the
minimum distances between portable and mobile HF communication devices (transmitters) and the boso blood pressure measuring
device as indicated below according to the maximum output of the communication device.
For transmitters whose nominal output is not stated in the table above, the distance can be determined by using the equation for the
relevant column, where P is the nominal output of the transmitter in watts (W) according to the manufacturer of the transmitter.
COMMENT 1: An additional factor of 10/3 was used to calculate the recommended safety distance of transmitters in the 80 MHz to
2.5 GHz frequency range in order to reduce the likelihood of a mobile/portable communication device accidentally brought close to the
patient leading to interference.
COMMENT 2: These guidelines may not be applicable in all situations. Electromagnetic waves are affected by absorption and
reflection from buildings, objects and people.
Nominal output of the transmitter
Safety distance according to transmission frequency m
W
150 kHz to 80 MHz
d = 1.2 P
80 MHz to 800 MHz
d = 1.2 P
800 MHz to 2.5 GHz
d = 2.3 P
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
Where P is the nominal output of the transmitter in watts (W) according to information provided by the manufacturer of the
transmitter and d is the recommended safety distance in metres (m). At all frequencies, the field strength of stationary radio
transmitters is less than the compliance levelb according to on-site testinga. Interference is possible in the vicinity of devices
with this symbol.
