SM010-3 Siemens SD 270 Operating & Service Manual Page 39
Immunity test
IEC 60601
test level
Compliance
level
Electromagnetic
environment –
guidance
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 SD 270
Audiometer requires
continued operation
during power mains
interruptions, it is
recommended that
the SD 270
Audiometer be
powered from an
uninterruptible 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 commercial
or hospital
environment.
NOTE U
T
is the a.c. mains voltage prior to the application of the test level