Copy Right. Hunan Accurate Bio-Medical Technology Co., Ltd
Page 26 / Total 29
Guidance and Declaration - Electromagnetic Immunity
The device is suitable for use in the electromagnetic environment specified below. The customer or the user of the device should assure
that it is used in such an environment.
Immunity tests
IEC 60601 test level
Compliance level
Conduced RF IEC
61000-4-6
3 Vrms 150 kHz to 80
MHz
6 Vrms 150 kHz to 80
MHz outside ISM bandsa
3 Vrms 150 kHz to 80 MHz
6 Vrms 150 kHz to 80 MHz outside
ISM bandsa
Radiated RF IEC
61000-4-3
10 V/m
80M to 2.7GHz
10 V/m
Electromagnetic environment - guidance
Portable and mobile RF communications equipment should be used no closer to any part of the
device, including cables, than the recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended Separation Distance:
where P is the maximum output power rating of the transmitter in watts (W) according to the
transmitter manufacturer and d is the recommended separation distance in meters (m).
Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey ,
should be less than the compliance level in each frequency rang b.
Interference may occur in the vicinity of equipment marked with the symbol
Note 1: From 80 MHz to 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 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 from 150kHz to 80MHz, field strengths should be less than 3V/m.
Recommended Separation Distances between Portable and Mobile RF
Communications Equipment and The device
The device is suitable for use in an electromagnetic environment in which radiated RF
disturbance are controlled. The customer or the user of the device can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile
RF communications equipment (transmitters) and the device as recommended below,
according to the maximum output power of the communication equipment.
Rated Maximum
Output power of
Transmitter (W)
Separation Distance (m) Corresponding to Frequency of
Transmitter
150k to 80MHz
80M to 800MHz
800M to 2.7GHz
0.01
0.12
0.04
0.07
0.1
0.37
0.12
0.23
