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8. Operation
Fig. 66 Control panel
1 Variable function keys
(also on the right side of the stand)
2 Aperture diaphragm
3 Transmitted light / incident light
4 Field diaphragm
5 Light intensity
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8.9 Light sources
• Adjust the brightness using the function keys
(66.5). The INT function buttons are always
assigned to the currently active transmitted
light (TL) or incident light (IL) axis.
• For TL and IL:
The setting can be made in coarse and fine
steps. Pressing both INT buttons at the same
time toggles between coarse and fine adjust-
ment. The light intensity in the display chang-
es accordingly.
0-20
Coarse adjustment:
======
0-255
Fine adjustment:
----------
• The intensity is individually adjusted and stored
for each objective and contrast method.
• For fluorescence:
The brightness is adjusted in 5 defined incre-
ments (FIM):
100% / 55% / 35% / 20% / 10%
8.10 Aperture diaphragm and field diaphragm
Both diaphragms have been set to suitable val-
ues for the current objective and contrast meth-
od at the factory.
• The diaphragms can be adjusted at any time
using AP (aperture diaphragm) (66.2) and FD
(field diaphragm) (66.4) function keys.
Caution!
The old values will be overwritten by the current
ones!
• The function keys are assigned to the current-
ly active transmitted light (TL) or incident light
(IL) axis.
Caution!
When the PH or DF is being used, the aperture
diaphragm is opened completely and
cannot be
closed to prevent incorrect operations.