Zeiss AT 030, Product Documentation Set

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7 Maintenance Instruction for use
AT 030 7.3 Adjusting the swivel-mounted tonometer holder with round mounting
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If the same eyepiece is always to be used for tonometry, the
adjustment is now finished.
If, however, both eyepieces are to be used alternately, the position
of the AT 030 on the base plate must now be changed:
u
Release the knurled screw and remove the tonometer.
u
Set the tonometer with the centering pin into the other
alignment hole of the base plate.
u
Retighten the knurled screw.
u
Check, whether the measuring prism is also correctly aligned in
this eyepiece. If not, repeat the first four steps.
Setting/checking the correct focus position (image focus C)
u
Set the scale on the tonometer to zero.
u
To assess the focus sharpness apply a visible structure to one
side of the front surface of the measuring prism (e.g. finger-
print, dust, graph paper).
Figure 12: Structure on one side of measuring prism
u
Set the magnification of the slit lamp microscope to 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 only at the front (towards patient),
the swivel arm with tonometer should be moved further
forward:
ð
First loosen the two set screws by approx. ¼ turn.
ð Then loosen the two clamping screws by approx. ½ turn.