Operating Instructions
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69
9.2
Interference immunity
The UNIT is intended for operation in the electromagnetic environment
specified below.
The customer or user of the UNIT should make sure that it is used in such
an environment.
Interference
immunity tests
IEC 60601-1-2 test level
Compliance level
Electromagnetic environment –
guidance
Electrostatic
discharge (ESD)
according to IEC
61000-4-2
± 6 KV contact discharge
± 8 KV air discharge
± 6 KV contact
discharge
± 8 KV air discharge
Floors should be wood, concrete, or
ceramic tile. If floors are covered with
synthetic material, the relative
humidity should be at least 30 %.
Electrical fast
transient/burst
according to
IEC 61000-4-4
± 1kV for input and output
lines
± 2 kV for power supply
lines
± 1kV for input and
output lines
± 2 kV for power supply
lines
The quality of the line power supply
should be that of a typical commercial
or hospital environment.
Surge voltages
according to IEC
61000-4-5
± 1 kV differential mode
± 2 kV common mode
voltage
± 1 kV differential mode
± 2 kV common mode
voltage
The quality of the line power supply
should be that of a typical commercial
or hospital environment.
Voltage dips, short
interruptions and
variations of the
power supply
according to IEC
61000-4-11
<5% U
T
for ½ period
(>95% dip of U
T
)
40% U
T
for 5 periods (60%
dip of U
T
)
70 % U
T
for 25 periods
(30% dip of U
T
)
<5% U
T
for 5sec. (>95%
dip of U
T
<5% U
T
for ½ period
(>95% dip of U
T
)
40% U
T
for 5 periods
(60% dip of U
T
)
70 % U
T
for 25 periods
(30% dip of U
T
)
<5% U
T
for 5sec. (>95%
dip of U
T
The quality of the line power supply
should be that of a typical commercial
or hospital environment.
If the user of the UNIT requires it to
continue functioning following
interruptions of the power supply, it is
recommended to have the UNIT
powered by an uninterruptible power
supply or a battery.
Magnetic field of
power frequencies
(50/60 Hz) according
to 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.
Remarks: U
T
is the AC supply voltage prior to application of the test level.
Portable and mobile radio equipment
must not be used within the
recommended working clearance
from the UNIT and its cables, which is
calculated based on the equation
suitable for the relevant transmission
frequency.
Recommended working clearance:
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