Specifications
30 Operator’s Manual
Electromagnetic Immunity
These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects, and people.
Table7.Electromagnetic Immunity Guidelines
Immunity Test
EN 60601-1-2
Test Level
Compliance
Level
Electromagnetic Environment
Guidance
Electrostatic
discharge (ESD)
IEC/EN 61000-4-2
±6 kV contact
±8 kV air
±6 kV contact
±8 kV air
Floor should be wood, concrete, or
ceramic tile. If floors are covered
with synthetic material, the relative
humidity should be at least 30%.
Electric fast
transient/burst
IEC/EN 61000-4-4
± 2 kV for power
supply lines
± 1 kV for input/
output lines
± 2 kV for power
supply lines
± 1 kV for input/
output lines
Mains power quality should be that
of a typical commercial and/or
hospital environment.
Surge
IEC/EN 61000-4-5
± 1 kV
differential mode
± 2 kV common
mode
± 1 kV
differential mode
± 2 kV common
mode
Mains power quality should be that
of a typical commercial and/or
hospital environment.
Voltage dips, short
interruptions and
voltage variations
on power supply
IEC
/EN
61000-4-11
<5% UT
(>95% dip in UT)
for 0.5 cycle
<5% UT
(>95% dip in UT)
for 0.5 cycle
Mains power quality should be that
of a typical commercial and/or
hospital environment.
If the user of the warming system
requires continued operation during
power mains interruption, it is
recommended that the warming
system be powered from an
uninterruptible power supply or
battery.
Note: UT is the AC main’s voltage
prior to application of the test level.
40% UT
(60% dip in UT)
for five cycles
40% UT
(60% dip in UT)
for five cycles
70% UT
(30% dip in UT)
for 25 cycles
70% UT
(30% dip in UT)
for 25 cycles
<5% UT
(95% dip in UT)
for five seconds
<5% UT
(95% dip in UT)
for five seconds
Power frequency
(50/60 Hz)
magnetic field
IEC/EN 61000-4-8
3 A/m 3 A/m It may be necessary to position the
warming system further from the
sources of power frequency
magnetic fields or to install
magnetic shielding. The power
frequency magnetic field should be
measured in the intended
installation location to assure that it
is sufficiently low.
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