Zeiss AT 030, Product Documentation Set

Page: 55 / 88

Instruction for use 8 Troubleshooting
AT 030 ​
319300-9120-000-GA-GB-240320 49 / 60
Fault Eyepiece
image Remedy
Only part of the upper semicircle
and the entire lower semicircle are
visible:
The measuring prism is not
centered with the eye. The eye is
too far left. Move the slit lamp
to the left using the
control lever.
Position too high (too low)
Only part of a semicircle is visible
in the upper (lower) half:
The measuring prism is not
centered with the eye. The eye is
too far up (down). Move the slit lamp
upwards
(downwards) using
the control lever.
Full circle visible in the upper
(lower) half:
The measuring prism is not
centered with the eye. The eye is
too far up (down). Move the slit lamp
upwards
(downwards) using
the control lever.
Almost the whole circle visible at
the top (bottom), part of semicircle
visible at the bottom (top):
The measuring prism is not
centered with the eye. The eye is
too far up (down). Move the slit lamp
upwards
(downwards) using
the control lever.
Two semicircle sections visible,
larger visible at top (bottom):
The measuring prism is not
centered with the eye. The eye is
too far up (down). Move the slit lamp
upwards
(downwards) using
the control lever.
Incorrect pressure
Fluorescein semicircles touch at
the outer boundaries:
Pressure too low. Turn the measuring
drum knob and
increase the
pressure slightly.
The fluorescein semicircles form a
ribbon:
Slightly too little pressure. Turn the measuring
drum knob and
increase the
pressure slightly.
The fluorescein semicircles no
longer touch at the outer bound-
aries:
Much too much pressure. Turn the measuring
drum knob and
lower the pressure
slightly.