marsden M-225, User Manual, Page: 14 / 20

Guidance and manufacturer’s declaration – electromagnetic immunity.
This scale is intended for use in the electromagnetic environment specified below. The customer or the user
of the scale should ensure that it is used in such an environment.
Immunity Test IEC 60601 test
level Compliance level Electromagnetic environment-
guidance
Voltage Dips, short
interruptions and voltage
variations on power
supply input lines IEC
61000-4-11 <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 s <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 s Mains power quality should be that of a
typical commercial or hospital
environment. If the M-225 requires
continued operation during power mains
interruptions, it is recommended that the
M-225 be powered from an uninterruptible
power supply or a battery.
Power frequency(50/60
Hz) magnetic field IEC
61000-4-8 3 A/m 3 A/m The M-225 power frequency magnetic
fields should be at levels characteristic of a
typical location in a typical commercial or
hospital environment.
NOTE UT is the AC mains voltage prior to application of the test level.
Guidance and manufacturer’s declaration-electromagnetic immunity.
The M-225 is intended for use in the electromagnetic environment specified below. The customer or the user
of the scale should assure that is used in such an environment.
Immunity test IEC 60601 test level
Compliance
level
Electromagnetic
environment-guidance
Conducted RF
IEC 61000-4-6
Radiated RF IEC
61000-4-3
3 Vrms
150 KHz to 80 MHz
3 V/m 80MHz to 2,5 GHz 3 Vrms
3 V/m
Portable and mobile RF
communications equipment should be
used no closer to any part of the
M-
225
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
d = 1,2 √ P 80MHz to 800 MHz
d = 2,3 √ P 800MHz to 2,5 GHz
Where P is the maximum output power
rating of the transmitter in watts (W)
according to the transmitter
manufacturer and
d is the
recommended separation distance in
metres (m).
Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey
a
, should be
less than the compliance level in each
frequency range
b
.
Interference may occur in the vicinity of
equipment marked with the following
symbol:
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