5
OPERATION (cont.)
USING THE 5-HOLE DIAPHRAGM
1. To obtain the best contrast for observing, match the hole size to
the objective that is being used to view the specimen.
2. Each hole has a corresponding number from 1 to 5. 1 is the
smallest hole; 5 is the largest hole.
Use the following guidelines to match the hole number to the
objective that you have selected:
40x objective: Use #5 hole
10x objective: Use #4 or #3 hole
4x objective: Use #2 or #1 hole
COARSE KNOB ADJUSTMENT - Model AY11240
1. The coarse adjustment knob has an adjustable heavy-light nut
(See Fig.1).
2. To adjust the knob loosen or tighten the nut.
NOTE: Adjusting the nut too tight will make focusing difficult.
Adjusting the nut too loose will cause the tube to slide.
Heavy-Light
Adjustment Nut
Fig. 1- Coarse Adjustment Knob
7. To clearly see the outline of the
specimen, rotate the coarse
adjustment knob and lower
the barrel to the space limiter.
8. Rotate the fine adjustment knob
until the image is in sharp focus.
When using other objectives, rotate
the fine focus adjustment until the
image is in focus.
6. To clearly see the outline of the
specimen, rotate the coarse
adjustment knob and lower
the barrel to the space limiter.
7. Rotate the fine adjustment knob
until the image is in sharp focus.
When using other objectives, rotate
the fine focus adjustment until the
image is in focus.
Model AY11240
Model AY11238
6
MODEL AY11228/AY11232
MICROSCOPE USAGE
BARSKA Model AY11228 and Model AY11232 are designed for
biological studies such as specimen examination. They can also
be used for examining bacteria and for general clinical and medical
studies. Simple design and use is especially useful for school
classroom instruction.
CONSTRUCTION
BARSKA Model AY11228 is a fixed power stereo microscope. It is
constructed with two optical paths at the same angle. It is
equipped with transmitted illumination and oblique illumination.
By using this instrument, the user can observe and enlarge the
right side stereo image. BARSKA Model AY11232 is a zoom stereo
microscope. The object being viewed is enlarged through two
identical sized sets of right and left eye lenses. The zoom provides
different magnification and features an inversion system which
allows the image to be viewed normally and right side up.
Model AY11228
Model AY11232
Diopter
Adjustment
Diopter
Adjustment
Prism
Cap
Prism
Cap
Eyepiece
Stage
Lens
Stage
Vertical
Pole
Illumination
Controls
Rotary
Case
Illumination
Controls
Spring
Clips
Spring
Clips
Focus
Knob
Focus
Knob
Magnification
Adjustment
Knob
Focus
Knob
Tightening
Knob
Oblique
Illuminator
Oblique
Illuminator
Lens
Housing
Eyepiece
