30
(95% dip in U
T
)
(95% dip in U
T
)
interruptions, it is
recommended that
the measuring
system be powered
from an
uninterruptible
power supply or a
battery.
Power
frequency
magnetic field
50Hz
IEC 61000-4-8
3A/m
3A/m
Power frequency
magnetic fields
should be at levels
characteristic of a
typical location in a
typical commercial
or hospital
environment.
Note: U
T
is the AC mains voltage prior to application of the test level.
9.3
Electromagnetic immunity
The medical oxygen concentrator is intended for use in the electromagnetic
environment specified below. The customer or the user of the concentrator
should assure that it is used in such an environment. As following:
Immunity test IEC60601
Test level
Compliance
level
Electromagnetic
environment—guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3V effective
value
150kHz -
80MHz
3V/m
80MHz -
2.5GHz
3V
effective value
3V/m
Portable and mobile RF
communications equipment
should be used no closer to any
part of the oxygen concentrator
including cables, than the
recommended separation
distance calculated from the
equation applicable to the
frequency of the transmitter.
Recommended Separation
Distances
d
＝
1.2
P
d
＝
1.2
P
80MHz - 800MHz
d
＝
2.3
P
800MHz - 2.5GHz
Where: