49
D-0126050 rev 1 -
270+ Operating Manual
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 Model 270+ Audiometer
requires continued operation during power
mains interruptions, it is recommended that
the Model 270+ Audiometer be powered
from an uninterruptible power supply or a
battery
Power frequency
(50/60Hz) 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
Summary of Contents for 270+
Page 1: ...270 Operating Manual...
