Gundlach 100 FL Special User manual

Construction of the microscope:
Objectives:
All objectives are produced accor-
ding to DIN-standard. The 40x
objective has a spring mount to
avoid breakage of specimens and
objective. The three-hole objective
revolver makes it easy to change
between the different objectives.
Focusing knobs and stage stop
adjustment:
The two adjustment knobs for coar-
se and fine focussing are placed on
both sides of the microscope. The
biggest knob is used for the coarse
adjustment and the small knob is
used for the fine adjustment.
A vertical finger screw is placed
behind the stage. When the lock
nut is loosened it is possible to turn
the finger screw, and thereby settle
the upper limit of the stage move-
ment. This protects the specimen
from touching and/or damaging the
objectives. The stage stop adjust-
ment (specimen protection) will
also make it easier to focus fast.
The microscope is delivered with a
pre-set stage stop adjustment and
it should therefore not be required
to make further adjustments.
Stage:
The specimen is placed on the
stage by pressing down on the two
stage clips and then placing the
specimen under them. The spe-
cimen can be moved by pushing it
gently with your fingers.
Condenser and iris diaphragm:
The condenser has a built-in iris
diaphragm with a little handle for
adjustment. The adjustment of the
iris diaphragm is important to obta-
in a good image. Closing the iris
diaphragm decreases the light but
increases the contrast and depth of
sharpness of the image. Adjust-
ment of the iris diaphragm might be
necessary when switching between
objectives.
Bulb:
The bulb is placed in the lamp hou-
sing (the black tube). It is a bayonet
bulb 220 V / 20 Watt.
Fuse:
The fuses are mounted at the rear
side of the main microscope body.
Manual for Microscope Model 100 FL Special VE116001
Itemno. 116001 Rev. 24.02.2006
Gundlach A/S Tel. [phone] [email protected]
Silkeborgvej 765 · DK-8220 Brabrand Fax [phone] www.gundlach.dk

Manual for Microscope Model 100 FL Special VE116001
Itemno. 116001 Rev. 24.02.2006
They can be found under the pla-
stic covers labelled “FUSE”.
Connecting the microscope to
mains
The microscope is developed for
the use with 220-240 V / 50-60 Hz.
General use of the microscope:
– Put the microscope on a dry and
clean place.
– Put the mains cord in a socket
and turn on the microscope.
– Adjust the light intensity with the
iris diaphragm.
– Place a specimen on the stage.
– Move the stage up and down
with the coarse focusing knobs
to obtain a clear and sharp
image. Use the fine focusing
knobs to make the last (fine)
adjustment.
– Rotate the objective revolver so
that the preferred objective is
moved into the light path. The
objectives are parfocal. This
means that only a minor adjust-
ment in focus might be necessa-
ry, when changing magnification.
Changing the bulb:
– Pull out the plug from the mains
and let the microscope cool
down for some minutes.
– Warning: The tube and the old
bulb can be very hot, so take
care of your fingers!
– Unscrew the black vertical tube
that holds the lamp.
– Pull out the old bulb by pressing
it down and turning it counter
clockwise. Replace it with a new
bayonet bulb 220 V / 20 Watt.
– It is important that the new bulb
is handled very carefully and is
not touched directly with the fin-
gers. Otherwise the glass sur-
face is damaged by the finger-
prints and the life of the bulb is
significantly reduced. Use a
clean cloth, plastic or a piece of
lens paper between the fingers
and the bulb when handling the
bulb.
– The lamp house is reattached.
Maintenance:
– Put the microscope on a dry and
clean place.
– The objectives are manufactured
according to strict standards
and tested in the factory. Please
never try to disassemble them
yourself.
– The surface of the lenses must
never be touched with fingers or
hard things. If the glass surfaces
are dirty use a clean and previ-
ously unused piece of lens paper
to clean it.
– Remove dust from the glass sur-
face with a clean lens brush or
an air dust cleaner for optics.
– Always use a specialized optical
cleaning agent and wipe the
glass surface gently several
times. Each time with a fresh
piece of lens cleaning paper.
Adjustment of friction:
– The friction in the focussing
adjustment can be altered with
the enclosed special key if the
microscope cannot hold the
focus because it drops down. It
is also used if the focusing knob
is very tight to turn. The tip of the
key is placed in one of the four
holes in the axle inside one of the
focusing knobs. It is then possi-
ble to tighten or loosen the ring
that is placed around the axle,
and with it adjusting the friction.
Caution:
– Never turn the two focussing
knobs against each other. It will
damage them!
– Turn off the microscope when it
is not used, and cover it with the
enclosed dust cover.
– Let the microscope cool down
for some minutes with the lamp
switched off before moving it
from one place to another. This
will minimize the risk of bulb
damage.
Gundlach A/S Tel. [phone] [email protected]
Silkeborgvej 765 · DK-8220 Brabrand Fax [phone] www.gundlach.dk
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