Operation (cont.), Construction – BARSKA Microscope User Manual

Page 6

OPERATION (cont.)

SELECTING OBJECTIVE

MAGNIFICATION

1. There are two objectives. The lower

magnification objective has a greater

depth of field and view.

2. In order to observe the specimen

easily use the lower magnification

objective first. Then, by rotating the

case, the magnification can be

changed.

CHANGING THE INTERPUPILLARY

DISTANCE

1. The distance between the observer's

pupils is the interpupillary distance.

2. To adjust the interpupillary distance

rotate the prism caps until both eyes

coincide with the image in the

eyepiece.

FOCUSING

1. Remove the lens protective cover.

2. Place the specimen on the working

stage.

3. Focus the specimen with the left eye

first while turning the focus knob until

the image appears clear and sharp.

4. Rotate the right eyepiece ring until the

images in each eyepiece coincide and

are sharp and clear.

CHANGING THE BULB

1. Disconnect the power cord from the

electrical outlet before changing the

bulb.

2. When the bulb is cool, remove the

oblique illuminator cap and remove

the halogen bulb with cap.

3. Replace with a new halogen bulb.

4. Open the window in the base plate and

replace the halogen lamp or

fluorescent lamp of transmitted

illuminator.

FOCUSING

1. Turn the focusing knob away or toward

you until a clear image is viewed.

2. If the image is unclear, adjust the

height of the elevator up or down,

then turn the focusing knob again.

ZOOM MAGNIFICATION

1. Turn the zoom magnification knob to

the desired magnification and field of

view.

2. In most situations, it is recommended

that you focus at the lowest

magnification, then move to a higher

magnification and re-focus as

necessary.

3. If the image is not clear to both eyes

at the same time, the diopter ring may

need adjustment.

DIOPTER RING ADJUSTMENT

1. To adjust the eyepiece for viewing with

or without eyeglasses and for

differences in acuity between the right

and left eyes, follow the following

steps:

a. Observe an image through the left

eyepiece and bring a specific point

into focus using the focus knob.

b. By turning the diopter ring

adjustment for the left eyepiece,

bring the same point into sharp

focus.

c.Then bring the same point into

focus through the right eyepiece

by turning the right diopter ring.

d.With more than one viewer, each

viewer should note their own

diopter ring position for the left

and right eyepieces, then before

viewing set the diopter ring

adjustments to that setting.

CHANGING THE BULB

1. Disconnect the power cord from the

electrical outlet.

2. When the bulb is cool, remove the

oblique illuminator cap and remove

the halogen bulb with cap.

3. Replace with a new halogen bulb.

4. Open the window in the base plate

and replace the halogen lamp or

fluorescent lamp of transmitted

illuminator.

Model AY11228

Model AY11232

MODEL AY11230/AY11234

MICROSCOPE USAGE

BARSKA Model AY11230 and Model AY11234 are trinocular

microscopes 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 and the

vertical tube make them is useful for school classroom instruction.

CONSTRUCTION

BARSKA Model AY11230 is a fixed power trinocular 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 AY11234 is a

zoom trinocular 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 AY11230

Model AY11234

Diopter
Adjustment

Prism
Cap

Eyepiece

Stage

Lens

Stage

Vertical

Tube

Vertical

Tube

Illumination

Controls

Rotary

Case

Spring

Clips

Spring

Clips

Focus

Knob

Magnification

Adjustment

Knob

Focus

Knob

Tightening

Knob

Oblique

Illuminator

Oblique

Illuminator

Lens

Housing

Eyepiece

Illumination

Controls