Yisunf AXD-808 Manual De Instrucciones página 13

Guidelines and Manufacturer's Declaration - Electromagnetic Immunity
Arm-type electronic blood pressure monitor is expected to be used in the following
specified electromagnetic environment, and the purchaser or user should ensure that
it is used in this electromagnetic environment:
IEC 60601
Immunity Test
Test Levels
RF conduction 3 V (RMS)
GB/T 17626.6 150kHz～80MHz
radio frequency
radiation 3V/m
GB/T 17626.3 80MHz～2.5GHz
Note 1: At 80MHz and 800MHz, the formula for the higher frequency band is used.
NOTE 2 These guidelines may not be suitable for all situations. Electromagnetic
propagation is affected by absorption and reflection from buildings, objects and people.
a. Fixed transmitters, such as base stations for wireless (cellular/cordless) telephones
and land mobile radios, amateur radio, AM and FM radio broadcasts, and TV
broadcasts, have field strengths that cannot theoretically be accurately predicted.
Electromagnetic
Match Level
Environment – A Guide
Portable and mobile RF
communication equipment
should not be used closer to
any part of the blood pressure
monitor, including cables, than
the recommended separation
distance. This distance is
calculated by a formula
corresponding to the frequency
3V (RMS)
of the transmitter.
Recommended isolation
distance
d =1.2
√p
d =1.2 80MHz～800MHz
√p
d = 2.3 800 MHz to 2.5 GHz
√p
where:
P — Transmitter maximum
according to transmitter
manufacturer Rated output
3V/m power in watts (W);
d — Recommended separation
distance, in meters (m).
Field strengths from fixed
radio frequency transmitters are
determined by a survey of the
electromagnetic field a and shall
be lower than the compliance
level in each frequency range b .
Interference may occur near
equipment marked with the
following symbols.
22
To assess the electromagnetic environment of fixed RF transmitters, an
electromagnetic site survey should be considered. If the measured field strength in
the location where the blood pressure monitor is located is higher than the applicable
RF compliance level above, the blood pressure monitor should be observed to verify
normal operation. If abnormal performance is observed, supplemental measures may
be necessary, such as reorienting or relocating the blood pressure monitor.
b.In the entire frequency range from 150kHz to 80MHz, the field strength should be
lower than 3V/m.
Recommended separation distance between portable and mobile radio frequency
communication equipment and arm-mounted electronic blood pressure monitor
Arm-mounted electronic blood pressure monitor is intended for use in electromagnetic
environments where radio frequency radiation disturbances are controlled. The purchaser
or user can prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile radio frequency communication equipment (transmitters) and
the electronic arm blood pressure monitor as recommended below, according to the
maximum rated output power of the communication equipment.
Isolation distance corresponding to different frequencies of the
Transmitter
transmitter/m
rated maximum
150kHz to 80MHz
output power
W d =
0.01 0.12
0.1 0.38
1 1.2
10 3.8
100 12
For the maximum rated output power of the transmitter not listed in the table above, the
recommended isolation distance d , in meters (m), can be determined by the formula in the
corresponding transmitter frequency column, where P is the transmission distance provided
by the transmitter manufacturer The maximum rated output power of the machine in
watts (W).
Note 1: At the 80MHz and 800MHz frequency points, the formula for the higher frequency
band is used.
Note 2: These guidelines may not be suitable for all situations. Electromagnetic propagation
is affected by absorption and reflection from buildings, objects and people.
80MHz to 800MHz 800MHz to 2.5GHz
d = d =
0.12 0.23
0.38 0.73
1.2 2.3
3.8 7.3
12 twenty three
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