15. Specifications and electrical ratings
Guidance and manufacturer’s declaration – electromagnetic immunity
The Keeler Portable Slit Lamp is intended for use in the electromagnetic environment specified below. The customer or user should assure
that it is used in such an environment.
Immunity test
IEC 60601 Test level
Compliance level
Electromagnetic environment - guidance
Electrostatic
± 6 kV contact
± 6 kV contact
Floors should be wood, concrete or ceramic tile.
discharge (ESD).
If floors are covered with synthetic material, the
IEC 6100-4-2
± 8 kV air
± 8 kV air
relative humidity should be at least 30%.
Electrical fast
± 2 kV for power supply lines
± 2 kV for power supply lines
Mains power quality should be that of a typical
transient/burst.
± 1 kV for power supply lines
± 1 kV for input/output lines
commercial or hospital environment.
IEC 61000-4-4
Surge.
± 1 kV line(s) to line(s)
± 1 kV line(s) to line(s)
Mains power quality should be that of a typical
IEC 61000-4-5
± 1 kV line(s) for input/
± 1 kV line(s) for input/
commercial or hospital environment.
output line(s)
output line(s)
Voltage dips, short
<5%
U
T
(> 95% dip in
U
T
)
<5%
U
T
(> 95% dip in
U
T
)
Mains power quality should be that of a
interruptions and
40%
U
T
40%
U
T
typical commercial or hospital environment.
voltage variations on
If the user of the Keeler Portable Slit Lamp
(60% dip in
U
T
) for 5 cycles
(60% dip in
U
T
) for 5 cycles
power supply input
requires continued operation during power
70%
U
T
70%
U
T
lines.
mains interruptions, it is recommended that the
IEC 61000-4-11
(30% dip in
U
T
) for 25 cycles
(30% dip in
U
T
) for 25 cycles
instrument be powered from an uninterruptible
<5%
U
T
<5%
U
T
power supply.
(>95% dip in
U
T
) for 5 s
(>95% dip in
U
T
) for 5 s
Power frequency
3 A/m
3A/m
Power frequency magnetic fields should be at
(50/60 Hz) magnetic
a level characteristic of a typical location in a
field. IEC 61000-4-8
typical commercial or hospital environment.
Note
U
T
is the a. c. mains voltage prior to application of the test level.
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