Operation; Basic Settings For Transmitted Light - Leica DMil Mode D'emploi

8. Operation

Caution!
For examinations using acids or other ag-
gressive chemicals, particular caution must
be taken. Avoid direct contact of these sub-
stances with optical and mechanical parts.

8.1 Basic settings for transmitted light

Switching on the transmitted light LED illumina-
tion
• Switch on the power switch.
• Adjust the brightness using the knob.
Note:
Auto-off function
The LED flashes briefly three times to indicate
activation. The LED flashes twice for a longer
time to indicate deactivation. By rotating the
brightness controller once (up to three seconds
after switching on the microscope) from the zero
position to maximum brightness and back, you
Fig. 23 Left side of the Leica DMi1
1 Brightness control
2 Focus drive
2
1
can activate or deactivate the automatic shutoff
of the LED. This means that after two hours, the
LED shuts off automatically and is reenabled only
by turning the brightness controller.
Adjustment specimen
For initial setting of the microscope, we recom-
mend using a specimen that has both high-con-
trast and low-contrast areas.
Focusing the specimen
• Position the desired objective. When doing
this, the objective nosepiece should be low-
ered first. The objective is swung into place by
turning the black knurled ring of the nosepiece.
Be sure that each nosepiece audibly clicks
into place.
• Bring the image into focus using the coarse
and fine adjustment, which adjusts the height
of the objective nosepiece. The level of the
stage remains unchanged. The total adjust-
ment is 9 mm. The focusing range extends (in
air) from 1.0 mm below the stage surface to 8
mm above it.
Caution!
Depending on the objective used, the objec-
tive nosepiece must be lowered before turn-
ing over the objective. Otherwise, there is a
risk that the objective will collide with the
stage.
8. Operation
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