88
Visionix EyeRefract User Guide
88
Appendices
Electromagnetic Immunity
The EyeRefract is intended for use in the electromagnetic environment specified below. The
customer or the user of the EyeRefract should assure that it is used in such an environment.
Electromagnetic environment –
guidance
Electrostatic
discharge
(ESD)
IEC 61000-
4-2
8 kV contact
2, 4, 8, 15kV air
8 kV contact
2, 4, 8, 15kV air
Floors should be wood, concrete or
ceramic tile. If floors are covered
with synthetic material, the relative
humidity should be at least 30%.
Electrical
fast
transient/
burst
IEC 61000-
4-4
2 kV for power
supply lines
1 kV for input/
output lines
2 kV for power
supply lines
2 kV for power
supply lines
Mains power quality should be that
of a typical commercial or hospital
environment.
1 kV line(s) to
line(s)
2 kV line(s) to
earth
2 kV Signal input/
output) to earth
1 kV line(s) to
line(s)
2 kV for line(s)
to earth
N/A
2 kV for power
supply lines
Mains power quality should be that
of a typical commercial or hospital
environment.
Voltage
dips, short
interruptions
and voltage
variations on
power
supply input
lines
IEC 61000-
4-11
0% UT; 0.5cycle
at 0°, 45°, 90°,
135°,180°, 225°,
270° and 315°
0% UT; 1cycle
and 70% UT;
25/30 cycles
Single phase at
0° 0% UT;
250/300 cycle
0% UT;
0.5cycle at 0°,
45°, 90°, 135°
,180°, 225°,
270° and 315°
0% UT; 1cycle
and 70% UT;
25/30 cycles
Single phase at
0° 0% UT;
250/300 cycle
Mains power quality should that of a
typical commercial or hospital
environment. If the user of the
EyeRefract requires continued
operation during power mains
interruptions, it is recommended
that the EyeRefract be powered
from an uninterruptible power
supply or a battery.
Power
frequency
(50/60
hertz)
magnetic
field
IEC 61000-
4-8
Power magnetic fields should be at
levels characteristic of a typical
location in a typical commercial or
hospital environment.
Note: UT is the a.c. mains voltage prior to application of the test level.
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