HINGMED DBP-01P - Page 20

Shenzhen Hingmed Medical instrument Co.,Ltd. (Enterprise Edition) 2020-11-18
Shenzhen Hingmed Medical instrument Co.,Ltd.
range b.
Interference may occur
near the devices marked
with the following
symbols.
Note 1: The formula for higher frequency should be used for frequencies between 80MHz and
800MHz.
Note 2: The guidelines may not be suitable for all cases and electromagnetic transmission is
affected by absorption and reflection of buildings, objects and human bodies.
a Field intensity of stationary transmitter cannot be foreseen theoretically, such as: base station
of radio telephone (cellular/wireless) and ground mobile radio, amateur radio, amplitude-
modulation and frequency-modulation radio broadcast, etc. To estimate the electromagnetic
environment of stationary RF transmitters, it is required to conduct the survey of
electromagnetic field. If measured field intensity of site where the instrument is placed is higher
than the above applicable RF conforming level, the instrument should be observed to verify that
it can be operated normally. If abnormal performance is found, supplemental measures may be
necessary, for example, orientation or position of the instrument should be re-adjusted.
b The field intensity should be less than 3 V/m in frequency range of 150kHz~80MHz.
Recommended isolation distance between portable and mobile RF communication device and
the instrument.
The instrument is intended to use in an electromagnetic environment where the radiation RF
disturbance is controlled. According to maximum rated output power of communication device,
the purchaser and the user can prevent electromagnetic interference through the following
recommended minimum distance between portable and mobile RF communication device
(transmitter) and the instrument.
Maximum rated
output power W of
transmitter
Isolation distance/m corresponding to transmitter in different
frequency
150kHz~80MHz
d =1.2
�
80MHz~800MHz
d =1.2
�
800MHz~2.5GHz
d =2.3
�
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
For the maximum rated output power of transmitters not listed in the above table, the
recommended isolated distance d in meter (m) can be determined by the formula in the column
of corresponding transmitter frequency. Wherein, P refers to the maximum rated output power
of transmitters provided by the transmitter manufacturer in watt (W).
Note 1: Formula for higher frequency should be used on frequency between 80MHz and
800MHz.
Note 2: The guidelines may not be suitable for all cases and electromagnetic transmission is
affected by absorption and reflection of buildings, objects and human bodies.