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7. Start-up
7. Start-up
7.1 Switching on the Microscope
• Switch on the microscope with the on/off
switch (24.1)
Caution!
After turning on the gas discharge lamp*,
the burner must be immediately adjusted.
Therefore, do not turn on the power supply*
unit yet. First, work in transmitted light in or-
der to familiarize yourself with the micro-
scope’s controls.
7.2 Köhler Illumination*
The condenser is also pre-adjusted in the
factory.
However, it may be necessary to re-adjust the
condenser in some cases. Therefore, check the
condenser centering.
The following procedure is provided for the
transmitted light brightfield illumination.
• If present click the condenser disk* into the
BF position
• If present pull the light ring slide* out of the
condenser
• Select an objective with moderate
magnification (10x-20x);
for condensers with movable condenser
heads:
Swing in the condenser top
(The condenser top is swung out for objective
magnifications < 10x.)
• Insert the specimen into the stage’s specimen
holder
• Focus on the specimen using the focus wheel
(24.2)
• Set the light intensity using the brightness
control (25.2)
• Close the field diaphragm (25.3) until the edge
of the diaphragm appears in the specimen
plane (26a)
Fig. 24
1 On/Off switch
2 Focus wheel
3 Stage positioning
21 3