19.3.2 Electromagnetic Resistance
NOTE U
T
refers to the AC mains voltage before the test level is applied.
Resistance Test Test Level as per IEC
60601
Level of Compliance Electromagnetic Environ-
ment
Electrostatic discharge (ESD)
IEC 61000-4-2
± 6 kV for contact
± 8 kV for air
± 6 kV for contact
± 8 kV for air
Ensure that the following
requirements are met:
Floors: wood, concrete or
ceramic tiles
Relative humidity: >30%
Electrical fast transient
response/ group of impulses
IEC 61000-4-4
± 2 kV in feeder line
± 1 kV in input/out- put line
± 2 kV in feeder line
± 1 kV in input/out- put line
Ensure that mains quality is
suitable for commercial or
hospital environment.
Short-time voltage drop,
short-duration interruptions
and slow voltage changes on
the fee- der input line
IEC 61000-4-11
± 1 kV between lines
± 2 kV between line (lines)
and earth
± 1 kV in differential mode
± 2 kV in co-phasal mode
Ensure that mains quality is
suitable for commercial or
hospital environment.
Fluctuating voltage/Flashing
radiation
EC 61000-3-3
<5 % U
T
(>95 % short-du-
ra- tion drop of U
T
) within
0.5 cycles
40 % U
T
(60 % short-du-
ra- tion drop of U
T
) within
5 cycles
70 % U
T
(30 % short-dura-
tion drop of U
T
) within 25
cycles
<5 % U
T
(>95 % short-du-
ra- tion drop of U
T
) within
5 s
<5 % U
T
(>95 % short-du-
ra- tion drop of U
T
) within
0.5 cycles
40 % U
T
(60 % short-du-
ra- tion drop of U
T
) within
5 cycles
70 % U
T
(30 % short-dura-
tion drop of U
T
) within 25
cycles
<5 % U
T
(>95 % short-du-
ra- tion drop of U
T
) within
5 s
Ensure that mains quality is
suitable for commercial or
hospital environments.
For permanent operation
during a power failure,
connect the bed to a power
generator since the back-up
battery’s capacity is limited.
Magnetic eld of network
frequency (50/60 Hz)
IEC 61000-4-8
3 A/m 3 A/m Ensure that the magnetic
elds of the network fre-
quency conform to the nor-
mal levels of commercial or
hospital environments.
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