30
Voltage dips,
short
interruptions
and
voltage
variations
on power
supply
input lines
IEC 61000-4-11
<5% U
T
(>95%
dip in U
T
) for
0.5 cycle
40% U
T
(60%
dip in U
T
) for
5 cycles
70% U
T
(30%
dip in U
T
) for
25 cycles
<5% U
T
(>95%
dip in U
T
) for
5 sec
<5% U
T
(>95%
dip in U
T
) for
0.5 cycle
40% U
T
(60%
dip in U
T
) for
5 cycles
70% U
T
(30%
dip in U
T
) for
25 cycles
<5% U
T
(>95%
dip in U
T
) for
5 sec
Mains power quality should be that of a typical
commercial or hospital environment. If the
user of the [ME EQUIPMENT or ME SYSTEM]
requires continued operation during power mains
interruptions, it is recommended that the [ME
EQUIPMENT or ME SYSTEM] be powered from
an uninterrupted power supply or a battery.
Power
frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
3 A/m
3 A/m
Power frequency magnetic fields should be at
levels characteristic of a typical location in a
typical hospital or home environment.
• At 80 MHz and 800 MHz, the higher frequency range applies.
• These guidelines may not apply in all situations. Electromagnetic
propagation is affected by absorption and reflection from
structures, objects, and people.
• UT is the a.c. main voltage prior to application of the test level.
a
: Field strength 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 concentrator is used exceeds the applicable RF compliance level
above, the concentrator should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the TOC.
b
: Over the frequency range 150 kHz to 80 MHz, the field strengths should be less than 3V/m.
Recommended Separation Distances between Portable and Mobile RF
Communications Equipment and This TOC:
This concentrator is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
user of the concentrator can help prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and this concentrator as recommended below, according to the maximum
output power of the communications equipment.
Rated Maximum Power
Output of Transmitter (W)
Separation Distance According to Frequency of Transmitter (M)
150 kHz to 80 MHz
d=1.2√P
80 MHz to 800 MHz
d=1.2√P
800 MHz to 2.5 GHz
d=2.3√P
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 transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can
be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of
the transmitter in watts (W) according to the transmitter manufacturer.
