79
Guidance and manufacturer’s declaration – electromagnetic immunity
The device is intended 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 test
IEC 60601- test
level
Compliance
level
Electromagnetic environment – guidance
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz Not applicable
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
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2,5 GHz
3 V/m
80 MHz to 800 MHz
800 MHz to 2,5 GHz
where is the maximum output power rating of the transmitter in
watts (W) according to the transmitter manufacturer and is the
recommended separation distance in metres (m).
Field strengths from fixed RF transmitters, as determined by an
electromagnetic site survey,
a
should be less than the compliance level in
each frequency range.
b
Interference may occur in the vicinity of equipment marked with the
following symbol:
NOTE 1 At 80 MHz and 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 re-orienting or relocating the device.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than
V/m.
Recommended separation distances between portable and mobile RF communications equipment
and the device
The device is intended for use in an electromagnetic environment in which radiated RF disturbances
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
communications equipment.
IMMUNITY test
IEC 60601- test level
Compliance level
Electromagnetic
environment – guidance
Rated maximum
output power of
transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2,5 GHz
0,01
0,01
0,01
0,01
0,1
0,1
0,1
0,1
1
1
1
1
10
10
10
10
100
100
100
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance
in metres (m) can be estimated using the equation applicable to the frequency of the transmitter,
where is the maximum output power rating of the transmitter in watts (W) according to the transmitter
manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.
T
able 6 – Recommended separation distances between portable and mobile RF communications equipment
and the ME EQUIPMENT or ME SYSTEM – for ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
Model : TMB-988
