60
Welch Allyn Home Blood Pressure Monitor
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
< 5% U
T
(>95% dip in
U
T
) for 0.5
cycle
Mains power quality should be that of
a typical commercial or hospital
environment. If the user of the Welch
Allyn Home Blood Pressure Monitor
requires continued operation during
power mains interruptions, it is
recommended that the Welch Allyn
Home Blood Pressure Monitor be
powered from an uninterruptible
power supply or a battery.
40% U
T
(60% dip in U
T
)
for 5 cycles
40% U
T
(60% dip in U
T
)
for 5 cycles
70% U
T
(30% dip in U
T
)
for 25 cycles
70% U
T
(30% dip in U
T
)
for 25 cycles
< 5% U
T
(>95% dip in
U
T
) for 5
seconds
< 5% U
T
(>95% dip in
U
T
) for 5
seconds
Power
frequency
(50Hz)
magnetic field
IEC 61000-4-8
3A/m and
30 A/m
3A/m and
30 A/m
Power frequency magnetic fields
should be at levels characteristic of a
typical location in a typical
commercial or hospital environment.
Note: UT is the AC mains voltage prior to application of the test level.
Electromagnetic immunity