User's Manual

- 20 -
Guidelines and Manufacturer's Statement - Electromagnetic Immunity
The device is expected to be used in the following specified electromagnetic environment, and the purchaser or user of the
device shall ensure that it is used in such electromagnetic environment.
Immunity test
IEC 60601 test level
Conformity level
Electromagnetic Environment-Guide
Radio Frequency
Conduction
GB/T 17626.6
3 V( rms)
150 kHz ~ 80 MHz
3 V( rms)
Portable and mobile RF communications
equipment should not be used closer to
any part of the (equipment or system),
including cables, than the recommended
isolation distance. This distance is
calculated by the formula corresponding
to the transmitter frequency.
Recommended isolation distance
d = 1.2 �
Radio Frequency
Radiation
GB/T 17626.3
3V/m
80 MHz ~ 2.5 GHz
3V/m
d = 1.2 � 80 MHz ~ 800 MHz
d = 2.3 � 800 MHz ~ 2.5 GHz
where :
P - the maximum rated output power of the
transmitter, in watts (W), according to the
transmitter manufacturer.
d - The recommended isolation distance in
meters (m)
b
.
The field strength of the fixed RF transmitter
is determined by the electromagnetic field
house of Survey
a
to determine, in each
frequency range
b
should be lower than the
compliance level. Interference may occur
in the vicinity of equipment marked with the
following symbols.
Note 1: At 80 MHz and 800 MHz frequencies, the formula for the higher band is used.
Note 2: These guidelines may not be appropriate in all cases. Electromagnetic propagation is influenced by absorption and
reflection from buildings, objects and the human body.
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 device is used exceeds the applicable RF compliance level above, the device should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the device.
b. Over the frequency range 150 kHz to 80MHz, field strengths should be less than 3V/m.
c. The ISM (industrial, scientific and medical) bands between 0,15 MHz and 80 MHz are 6,765 MHz to 6,795 MHz; 13,553 MHz to
13,567 MHz; 26,957 MHz to 27,283 MHz; and 40,66 MHz to 40,70 MHz. The amateur radio bands between 0,15 MHz and 80 MHz