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IEC 61000-4-5
±0.5 kV, ±1 kV line-
line
±0.5 kV, ±1 kV, ±2 k
V line(s) - earth
±0.5 kV, ±1 kV line-line
±0.5 kV, ±1 kV, ±2 k
V line(s) - earth
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
(100 % dip in UT ) for
0.5 cycle at 0°, 4 5°,
90°, 135°,180°, 22 5°,
270°, and 315°
0 % UT
(100 % dip in UT ) for
1 cycle at 0°
70 % UT
(30 % dip in UT ) for
25/30 cycles at 0°
0 % UT
(100 % dip in UT ) for
250/300 cycle at 0°
0 % UT
(100 % dip in UT ) for
0.5 cycle at 0°, 4 5°,
90°, 135°,180°, 22 5°,
270°, and 315°
0 % UT
(100 % dip in UT )
for 1 cycle at 0°
70 % UT
(30 % dip in UT )
for 25/30 cycles at 0°
0 % UT
(100 % dip in UT ) for
250/300 cycle at 0°
Mains power quality should be that of a
typical commercial
or hospital environment. If the user of the
Model LRK-7000 product name requires
continue d operation during power mains
interruptions, it is recommended that the
Model LRK-7000 be powered from an
uninterruptible power supply or a battery.
Power frequency
(50/60 Hz) magnetic
field IEC 61000-4-8
30 A/m, 50/60Hz
30 A/m, 50/60Hz
Power frequency 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.
Guidance and manufacturer’s declaration –
electromagnetic immunity
The Model LRK-7000 is intended for use in the electromagnetic environment specified below. The c
ustomer or the user of The Model LRK-7000 should assure that it is used in such an environment.
Summary of Contents for LRK-7000
Page 1: ...LRK 7000 Autorefractor Keratometer Operation Manual LRK 7000 ...
Page 20: ...20 5 Name and function of each part 5 1 Key part 1 6 4 5 7 3 2 Front part ...
Page 36: ...36 Too far Location and Focus are correct ...
Page 45: ...45 Example of a printed page ...