Leica DM2500, Manual

Page: 113 / 311

35
7. Start-up
• Select an objective with moderate magnifica-
tion (10x-20x).
For condensers with movable condenser
heads:
Swing in the condenser top.
(The condenser top is swung out for objective
magnifications < 10x.)
For Leica DM3000:
To swing in the objective, press the corre-
sponding objective key on the front control
panel. If the microscope is equipped with a
motorized condenser, the condenser head is
automatically swung in or out depending upon
the objective magnification.
• Insert the specimen in the stage’s specimen
holder.
• Focus on the specimen using the focus wheel
(32.2).
Fig. 34 Leica DM2500
1 Condenser height adjuster
2 Brightness control
3 Field diaphragm
4 Condenser centering
1 2 3
4
• Set the light intensity using the brightness
control (33.2, 34.2).
• Close the field diaphragm (33.4, 34.3) until the
edge of the diaphragm appears in the speci-
men plane (34a).
• Using the condenser height adjuster (33.3,
34.1), adjust the condenser until the edge of
the field diaphragm appears in sharp relief.
• If the image does not appear in the middle of
the field of view (35c), the condenser must be
moved into the middle of the field of view with
the help of the two centering bolts (34.4). The
tool required for this purpose is magnetically
attached to the underside of the stage.
Fig. 33 Leica DM2500
1 Focus wheel
2 Brightness control
3 Condenser height adjuster
4 Field diaphragm control
5 On/off switch
6 Condenser centering
7 Stage positioning
5 4 2 1 3
7
6