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9. Oil immersion
Directions for observation with oil immersion. Put a drop of
immersion oil (16) onto the upper lens of condenser and raise
the condenser by using the height adjustment (11) until the oil
touches the slide from below. Centre your object, with mid-
dle magnification, and with the light illumination on. Move the
nosepiece with the coarse focusing wheel up high and screw
in the 100x objective. Take a drop of immersion oil and place
it on the preparation. Move the objective down carefully with
the coarse adjustment, until it touches the immersion oil. Look
through the eyepiece and focus with the fine adjustment. Do
not forget to clean the objective, the preparation, and the con-
denser after the observation with some alcohol.
NoTES on cleaning
1. Avoid disassembling the microscope!
Because of being a precise optical instrument, do not disas-
semble the microscope. That may cause serious damage to
its performance. Do not disassemble the objectives.
2. Avoid contamination!
You should make sure that dust or moisture do not come
in contact with your microscope. Avoid putting fingerprints
on any optical surfaces! If dust or dirt nevertheless have
gotten onto your microscope, or the accessories, remove it
as described below.
3. Cleaning non-optical parts:
Disconnect the plug from mains socket before cleaning
non-optical parts of the microscope (e. g. the frame or the
stage). Firstly, remove dust or dirt from your microscope, or
accessories, using a soft brush. Then clean the soiled area
with a soft, lint-free cloth; the cloth may be moistened with
a mild detergent solution. Be sure that the microscope is
dry before using. For cleaning the painted parts or plastic
components, do NOT use organic solvents such as alcohol,
ether, acetone, xylene or other thinner etc.!
4. Cleaning optical parts:
In order to enhance the optical quality, the lenses of eye-
pieces or objectives are coated. They should not be wiped
because dry dirt or dust may scratch the coating. It is best
to remove the parts to be cleaned from the frame prior to
cleaning. Always blow loose dust away first. Use lens tissue
of good quality or soft fabric moistened with a small amount
of pure alcohol (available in the chemist’s shop); wipe the
lens surface clean.
5. Cleaning the oil immersion lens:
After working with oil immersion, the immersion oil should
be removed from the lens of the 100x objective at the end
of each workday. In order to do this, use a lens tissue moi-
stened with a small amount of pure alcohol (available in the
chemist’s shop). Don’t forget to clean the preparation, too.
6. When not in use:
After usage, cover the microscope with the dust cap (made
of plastic) and place it where it is dry and mouldless. In
the case of non-use for a longer time, you should stow the
microscope and the accessories in their correct containers
again. We suggest the storage of all objectives and eyepi-
eces in a closed container with drying agent.
Remember: A well maintained microscope will keep its
optical quality for years and thus maintain its value.
10. Technical data:
Trinocular head
Mechanical desk (with vernier alignment)
Eyepieces:
DIN WF 10x
Objectives:
DIN 4x / 10x / 40x / 100x
Magnification:
40x -1000x
Illumination:
LED
Accessories:
Immersion oil, fuse
11. Aperture:
The numerical aperture (the unit of measurement for the reso-
lution factor of the objectives) is engraved beside the magnifi-
cation sign on the objectives.
12. The magnification for microscopes
It is calculated by the formula:
Eyepiece magnification x objective magnification
= total magnification
Example:
10x-eyepiece x 100x-lens = 1000x total magnification
Disposal
Dispose of the packaging materials properly, accord-
ing to their type (paper, cardboard, etc). Contact your
local waste disposal service or environmental authority for
information on the proper disposal.
Do not dispose of electronic devices in the household garbage!
As per the Directive 2002/96/EC of the European Parliament
on waste electrical and electronic equipment and its adapta-
tion into German law, used electronic devices must be col-
lected separately and recycled in an environmentally friendly
manner. Empty old batteries must be disposed of at battery
collection points by the consumer. You can find out more in-
formation about the disposal of devices or batteries produced
after 01.06.2006 from your local waste disposal service or en-
vironmental authority.
Please take the current legal regulations into account when
disposing of your device. You can get more information on the
proper disposal from your local waste disposal service or en-
vironmental authority.
