3B Scientific Monocular Course Microscope Model 100 (230 V, 50__60 Hz) - Manual (Page 4)

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com
Subject to technical amendments
© Copyright 2007 3B Scientific GmbH
shaft and a converging lens, power supply 115 V
resp. 230 V 50/60 Hz
Condenser: Bright-field condenser N.A. 0.65, iris
diaphragm, filter holder and blue filter
Dimensions: 175 x 135 x 370 mm³ approx.
Weight: 2.9 kg approx.
3. Unpacking and assembly
The microscope is packed in a molded styrofoam
container.
• Take the container out of the carton remove
the tape and carefully lift the top half off the
container. Be careful not to let the optical i-
tems (objectives and eyepieces) drop down.
• To avoid condensation on the optical compo-
nents, leave the microscope in the original pa-
cking to allow it to adjust to room tempera-
ture.
• Using both hands (one around the pillar and
one around the base), lift the microscope from
the container and put it on a stable desk.
• The objectives will be found within individual
protective vials. Install the objectives into the
microscope nosepiece from the lowest magni-
fication to the highest, in a clockwise direction
from the rear.
• Insert the eyepiece into the tube.
4. Operation
4.1 General information
• Set the microscope on a level table.
• Place the object to be observed in the center of
the object plate. Use the clips to fasten it into
place. Make certain that the specimen is cen-
tered over the opening in the stage.
• Connect the mains cable to the net and turn on
the switch to get the object illuminated.
• Make certain that the specimen is centered
over the opening in the stage.
• Adjust the aperture of the iris diaphragm to get
the background brightness suitable for a high
contrast image.
• Rotate the nosepiece until the objective with
the lowest magnification is pointed at the
specimen. There is a definite “click” when each
objective is lined up properly.
NOTE: It is best to begin with the lowest power
objective. This is important to reveal general struc-
tural details with the largest field of view first.
Than you may increase the magnification as nee-
ded to reveal small details.
To determine the magnification at which you are
viewing a specimen, multiply the power of the
eyepiece by the power of the objective.
• Adjust the coarse-focusing-knob which moves
the stage up until the specimen is focused. Be
careful that the objective does not make con-
tact with the slide at any time. This may cause
damage to the objective and/or crack your
slide.
• Adjust the fine-focusing-knob to get the image
more sharp and more clear.
• Colour filters may be inserted into the filter
holder for definition of specimen parts. Swing
the filter holder out and insert colour filters.
4.2 Changing the lamp and fuse
4.2.1 Changing the lamp
• Turn off the power switch, unplug the mains
plug and let the lamp cool down to avoid being
burnt.
• Do not touch the bulb with the bare hand.
• To change the lamp screw the lamp-housing
off the base.
• Press the bulb into the base and remove it by
turning it clockwise.
• Insert the new bulb by lightly pressing it
downwards and secure it by turning it counter-
clockwise.
• Remount the lamp-housing.
4.2.2 Changing the fuse
• Turn off the power switch and unplug the
mains plug.
• Unscrew the fuse holder on the back of the
stand base with a screwdriver.
• Replace the fuse and reinsert the holder in its
socket.
5. Storage and cleaning
• Keep the microscope in a clean, dry and dust
free place.
• When not in use always cover the microscope
with the dust cover.
• Do not expose it to temperatures below 0°C
and above 40°C and a max. relative humidity
of over 85%.
• Always turn off the light immediately after use.
• Use a soft linen cloth and some ethanol to
clean the microscope.
• Use a soft lens tissue to clean the optics.