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6-6
Measurements are unstable or inappropriate.
The converted acoustic velocity is not set appropriately.
Check the setting of the converted acoustic velocity. A
different converted acoustic velocity can be set for right
and left eyes. Check the setting for both eyes.
The retina waveform gate cursor is not set in an
appropriate position.
Set the retina waveform gate cursor on the immediate
left of the actual retina waveform. Make sure that there
are no unnecessary waveforms between the retina gate
cursor and retina waveform.
Monitoring sound does not go off.
The volume is set to "Mute (Off)" for the AL-4000
measuring unit.
Set the volume to a level other than “Mute (Off)” as
described in the instruction manual for the AL-4000
measuring unit.
Noise interferes with waveforms.
Noise is generated in the peripheral area.
If there is any source of noise (devices such as a motor,
laser surgical equipment, etc.) near the instrument,
move it away from the instrument.
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