biodex 950-440 - Page 117

Balance System SD (with v4.X software) 117
Immunity test
IEC 60601 Test
level
IEC 60601-1-2
Compliance level
Electromagnetic environment –
guidance
Voltage dips, short
interruptions and voltage
variations on power
supply input lines
IEC 61000-4-11
< 5% UT (>
95% of dip in
UT) for 1/2 cycle
40% UT
(60% of dip
in UT) for 5
cycle
70% UT
(30% of dip
in UT) for 25
cycle
< 5% UT (> 95%
of dip in UT) for
5 sec
< 5% UT (> 95%
of dip in UT) for
1/2 cycle
40% UT (60%
of dip in UT)
for 5 cycle
70% UT (30%
of dip in UT)
for 25 cycle
< 5% UT (>
95% of dip
in UT) for 5
sec
Mains power quality should be that of a
typical commercial or hospital
environment. If a better mains power
quality is required, it is recommended
that the
Balance System SD is powered
from an uninterruptible power supply.
Power frequency (50/60
Hz) magnetic field
IEC 61000-4-8
3 A/m
3 A/m
If image distortion occurs, it may be
necessary to position the Balance
System SD display further from
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.
Conducted RF IEC
61000-4-6
3 Vrms,
150 KHz to 80
MHz
3 Vrms,
150 KHz
to 80 MHz
Portable and mobile RF communications
equipment should be used no closer to any
part of the Balance System SD, 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 150 KHz to 80 MHz
d = 1.2√ P 80 MHz to 800 MHz
d = 2.3√ P 800 MHz to 2.5 GHz
Where P is the maximum output power
rating of the transmitter in watt (W)
according to the transmitter manufacturer,
and d is the recommended separation
distance in meters (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:
Radiated RF IEC 61000-
4-3
3 Vrms,
80 MHz to 2.5
GHz
3 V/m,
80 MHz to 2.5
GHz