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.
Electromagnetic environment - guidance
Floors should be wood, concrete or ceramic tile.
If floors are covered with synthetic material, the
relative humidity should be at least 30%.
± 2 kV for power supply lines
± 2 kV for power supply lines
Mains power quality should be that of a typical
± 1 kV for power supply lines
± 1 kV for input/output lines
commercial or hospital environment.
± 1 kV line(s) to line(s)
± 1 kV line(s) to line(s)
Mains power quality should be that of a typical
± 1 kV line(s) for input/
± 1 kV line(s) for input/
commercial or hospital environment.
Mains power quality should be that of a
typical commercial or hospital environment.
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
requires continued operation during power
mains interruptions, it is recommended that the
(30% dip in U
T
) for 25 cycles
(30% dip in U
T
) for 25 cycles
instrument be powered from an uninterruptible
(>95% dip in U
T
) for 5 s
Power frequency magnetic fields should be at
a level 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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