Zeiss AT 030, Product Documentation Set

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7 Maintenance Instruction for use
AT 030 7.2 Adjusting the swivel-mounted tonometer holder with square mounting
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Figure 10: Structure on one side of measuring prism
u
Set the magnification of the slit lamp microscope to a high
magnification (e.g. 20x or 25x).
u
Set the illumination using the slit projector from the left to
about 90° so that the front of the measuring prism is illumi-
nated.
u
Check whether the sharp focus of the visible structure on one
side is in the middle of the motion range by carefully swiveling
the measuring prism from the front to the back stop.
u
If the sharp focus position is not correct, loosen the two
clamping screws by approx. ½ turn.
u
Push the swivel arm including tonometer forwards or
backwards in the slot until the sharp focus of the structure
visible on one side is in the middle of the motion range. When
moving the tonometer lift it slightly to avoid it tilting under its
own weight.
u
Retighten the clamping screws alternately. Start with the rear
clamping screw. Make sure that the measuring prism is in the
center of the field of view.
u
Carry out a further check in accordance with step 5.
NOTE! The measuring prism must be visible in the center of
the eyepiece.