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Information on potential electromagnetic interference and advice on
how to avoid or minimize such interference (IEC/EN 60601-1-2:2007)
Guidance and manufacturer's declaration – electromagnetic immunity
The model HIT-W121 is intended for use in the electromagnetic environment specified below. The customer or the user of
the model HIT-W121 should assure that it is used in such an environment.
Immunity test
Electrostatic
6 kV contact
discharge (ESD)
IEC 61000-4-2
8 kV air
Electrical fast
2 kV for power
transient/burst
supply lines
IEC 61000-4-4
1 kV for input/output
lines
Surge
1 kV line(s) to line(s)
IEC 61000-4-5
2 kV line(s) to earth
interruptions and
<5 % UT
voltage variations
(>95 % dip in UT)
on power supply
for 0,5 cycle
input lines
40 % UT
IEC 61000-4-11
(60 % dip in UT)
for 5 cycles
70 % UT
(30 % dip in UT)
for 25 cycles
<5 % UT
(>95 % dip in UT)
for 5 sec
Power frequency
3 A/m
(50/60 Hz)
magnetic field
IEC 61000-4-8
NOTE UT is the a.c. mains voltage prior to application of the test level.
IEC 60601
Compliance level
test level
6 kV contact
8 kV air
2 kV for power
supply lines
1 kV for input/output
lines
1 kV line(s) to line(s)
2 kV line(s) to earth
<5 % UT
(>95 % dip in UT)
for 0,5 cycle
40 % UT
(60 % dip in UT)
for 5 cycles
70 % UT
(30 % dip in UT)
for 25 cycles
<5 % UT
(>95 % dip in UT)
for 5 sec
3 A/m
Electromagnetic environment –
guidance
Floors should be wood, concrete
or ceramic tile. If floors are
covered with synthetic material,
the relative humidity should be at
least 30 %.
Mains power quality should be
that of a typical commercial or
hospital environment.
Mains power quality should be
that of a typical commercial or
hospital environment.
Mains power quality should be
that of a typical commercial or
hospital environment. If the user
of the model HIT-W121 requires
continued operation during power
mains
interruptions,
it
recommended that the model
HIT-W121 be powered from an
uninterruptible power supply or a
battery.
Power frequency magnetic fields
should be at levels characteristic
of a typical location in a typical
commercial
or
hospital
environment.
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