Welch Allyn SureSight Autorefractor - User Manual - Manual (Page 31)

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Electromagnetic Immunity
The SureSight is intended for use in the electromagnetic environment specified below. The
customer or the user of the SureSight should assure that it is used in such an environment.
Immunity test
IEC 60601
test level Compliance level Electromagnetic
environment – guidance
Electrostatic
discharge (ESD)
IEC 61000-4-2
±6 kV contact
±8 kV air
±6 kV contact
±8 kV 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
NA* Mains power quality
should be that of a typical
commercial or hospital
environment.
Surge
IEC 61000-4-5
±1 kV differential
mode
±2 kV common mode
NA* 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 >95% dip in 0.5 cycle
60% dip in 5 cycles
30% dip for 25 cycles
>95% dip in 5
seconds
NA* Mains power quality
should be that of a typical
commercial or hospital
environment. If the user of
the SureSight requires
continued operation during
power mains interruptions,
it is recommended that the
SureSight 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 Power frequency magnetic
fields should be at levels
characteristic of a typical
location in a typical
commercial or hospital
environment.