12
Voltage
dips,
short
interruptions
and
voltage
variations
in
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 s
N/A
Mains power quality should be that of a typical
commercial or hospital environment. If the user of
theIT-121 requires continued operation during
power mains interruptions, it is recommended that
theIT-121 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 application of the test level.
Table 7
Guidance and manufacturer ’s declaration-electromagnetic immunity
The IT-121 is intended for use in the electromagnetic environment specified below. The customer or the user
of the IT-901 should assure that it is used in such an environment.
Immunity test
IEC 60601 test level
Compliance
level
Electromagnetic environment-guidance
Conducted RF
IEC 61000-4-6
3Vrms
150kHz to 80MHz
N/A
Portable and mobile RF communications
equipment should be used no closer to any part of
theIT-121
including
cables,
than
the
recommended separation distance calculated from
the equation applicable to the frequency of the
transmitter.
Recommended separation distance
d
=1.2
P
