Technical Data - kruss MBL2000 Series Operating Manual

3. Operating the microscope / 3.5 Cover glass and object holder
Please proceed as follows:
1. First focus on the sample to be examined with a
low magnifying lens (e.g. 10x).
2. Use the coarse adjustment pre-selection stop as
described in 3.2.
3. Lower the microscope stage by using the coarse
adjustment knob.
4. Apply a drop of immersion oil on the spot where
the sample is to be examined and which is illumi-
nated by the condenser.
5. Swivel the immersion lens into position. Carefully
raise the microscope stage with the coarse adjust-
ment knob as far as it will go (to the pre-selection
stop).
6. If needed, refocus with the fine adjustment knob.
Make sure that there are no air bubbles developing
in the immersion oil.
After use, clean the immersion lens with lens cleaning
paper or a suitable cloth using ether or alcohol).
Important note!
Make sure that during the swivelling of another
object lens, it does not come into contact with the
oil, thus becoming contaminated!
3.5 Cover glass and object holder
The cover glass is placed over the sample. The lenses
provided with an engraving of 0.17 have been correc-
ted for a cover glass density of 0.17 mm, i.e. in case
of dry lenses with a NU (numeric aperture) of 0.7 and
higher, only a cover glass density of 0.17 mm is to be
used as the object lens comes with a cover glass
correction.
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A special cover glass for blood counting chambers of
0.4 mm thickness may be used for the achromatic
40x NA 0.65 object lens or for object lenses with lower
magnifications.
Object holder:
We recommend you use object holders with a thickness
between 0.8 and 1.5 mm.

4. Technical data

Optical head Inclined optical head, symmetrical eye distance adjust
ment (55 – 75 mm), dioptre compensation with scale.
Lens turret Quadruple
Achromatic object lenses 4x 0.10 NA 17.04 mm working distance
10x 0.25 NA 8.05 mm working distance
40x 0.65 NA 0.32 mm working distance
100x 1.25 NA 0.13 mm working distance
Eyepieces 10x, focal length 25 mm
Stand Made of metal with coaxial coarse/fine knob with a
range of 30 mm each.
The right coarse adjustment knob comes with a mobility
adjustment, the left coarse adjustment knob comes with
a quick focusing adjustment.
Microscope stage With 0.1 mm increment memory scale, left-right range
of movement 74 mm, forwards - backwards 30 mm.
Low voltage illumination Integrated, 6 V 20 W (or 30 W) halogen bulb with
brightness control.
Condenser Double lens ABBE Condenser, NA 1.25, with centring,
height adjustment and filter holder.
CE conformity The device complies with
EN 50081-1,IEC 1000-4-2,
IEC 1000-4-4 und IEC 1000-4-5.
4. Technical data
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