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22. EMC/Technical Description (cont.)
50 50
Voltage dips, short
interruptions and voltage
variations on power
supply input lines
IEC 61000-4-11
Power frequency
(50/60 Hz) magnetic field
IEC 61000-4-8
NOTE U is the a.c. mains voltage prior to application of the test level.
T
0 % UT ; 0,5 cycle
At 0°, 45°, 90°, 135°,
180°, 225°, 270°, and
315°
30 A/m, 50 or 60 Hz
Mains power quality
should be that of a typical
commercial or hospital
environment. If the user of
0 % UT ; 0,5 cycle
the breast pump requires
At 0°, 45°, 90°,
continued operation during
135°, 180°, 225°,
power mains interruptions,
270°, and 315°
it is recommended that the
breast pump be powered
from an uninterruptible
power supply or a battery.
It may be necessary to
position the breast pump
further from sources of
power frequency magnetic
fields or to install magnetic
30 A/m, 50/60 Hz shielding. The power
frequency magnetic field
should be measured in the
intended installation location
to assure that it is sufficiently
low.