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Operating modes: Dry/Immersion
To ensure simple yet safe objective change, the
objectives have to be classified in one of the
following three categories:
1. Dry objectives (D) = all dry objectives with a
short working distance (< = 3 mm).
2. Immersion objectives (I).
3. Combined objectives (C) = dry objectives with
a long free working distance (> 3 mm), ob-
jectives which can be used for scanning
purposes as well through an oil layer.
By pressing the “CHANGE” key, select the
display box for the operating mode.
Now select the valid objective category for the
objective you are using (D, I, C) by turning the
focus handwheel.
Learn mode: Objective data – Operating mode
Now all the objective parameters for the first
objective have been learned, and the other
objectives can be installed.
Ob j e c t i ve 1 :
5xPH
O
E
X
I
T
D
To learn further objectives:
Select objective no. 2 with the upper objective
nosepiece key. Screw the objective with the
next highest magnification into the nosepiece
opening which is now furthest to the right.
By turning the handwheel, select the magnifi-
cation display that matches the objective, as
you did for the first objective. Proceed in the
same way for setting the Phaco display, the IC
prism display and the operating mode. Then
repeat the setting procedures for the other
objectives.
Nosepiece positions that are not occupied by an
objective are given the code “--”. This has the
effect that these positions are not travelled to in
standard mode.
Conclude the Learn mode for the objective
parameters by pressing the “CHANGE” key.
“EXIT” flashes in the display; confirm with the
“LEARN” key.
Before selecting the “Parfocality” option in the
Learn mode, you should take the following
steps:
– If you want to use a specimen holder on your
stage, fit it now.
– Put a specimen on the stage.
– Switch to the highest magnification and focus
the image of the specimen.
– Set the focus position with the
key
(→ Fig. 53b).
You can now begin with learning the parfocality.
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