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MWA-M / MWA-PM-BA-e-1614
8.3 Electromagnetic noise immunity
Guidelines and manufacturer’s declaration - electromagnetic noise immunity
The multi-function balances MWA are intended for operation in the kind of electromagnetic
environment stated below. The customer or user of the multi-function balances MWA should ensure
that they are operated in this kind of environment.
Noise immunity tests
IEC 60601 test level
Conformity
Electromagnetic
environment - guideline
Discharge static
electricity (DSE)
acc. to IEC 61000-4-2
± 6 kV contact discharge
± 8 kV air discharge
± 6 kV
± 8 kV
Floors should be made of
wood or concrete or tiled with
ceramic tiles. If floors are
covered with synthetic
material, relative air humidity
must be at least 30%.
Fast transient electrical
disturbances / bursts
acc. to IEC 61000-4-4
± 2 kV for power lines
+ 1 kV for input and
output lines
± 2 kV
+ 1 kV
The quality of the supply
voltage should match that of
the typical business or
hospital environment.
Impulse voltages /
surges
acc. to IEC 61000-4-5
± 1 kV voltage
Live wire - live wire
± 2 kV voltage
Live wire - earth
± 1 kV
Inapplicable
The quality of the supply
voltage should match that of
the typical business or
hospital environment.
Voltage dips, short-term
disruptions and
fluctuations in supply
voltage
acc. to IEC 61000-4-11
< 5 %
(> 95 % dip of
)
for ½ period
40 %
(> 60 % dip of
)
for 5 periods
70 %
(> 30 % dip of
)
for 25 periods
< 5 %
(> 95 % dip of
)
for 5 s
Compliance
with
requirements
under all
postulated
conditions
Controlled
switch off
Return to
undisturbed
situation
after user
intervention.
The quality of the supply
voltage should match that of
the typical business or
hospital environment. If the
user demands continued
functioning of multi-function
balances MWA even after the
occurrence of a power failure,
we recommend using
uninterruptible means of
power supply or batteries for
the multi-function balances
MWA.
Magnetic field for supply
frequency
(50/60 Hz)
acc. to IEC 61000-4-8
3 A/m
3 A/m
50/60 Hz
Magnetic fields for the supply
frequency should match the
typical values found in the
particular business or hospital
environment.
NOTE equals AC line voltage prior to application of test level.