Adjustment And Operation; Adjusting Binocular Viewing Head - Unitron System 274 Manual

Installing the Eyepieces

ADJUSTMENT AND OPERATION

Adjusting Binocular Viewing Head

UNITRON ®
Fig. 6
Fig. 7
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SYSTEM 274 STEREO MICROSCOPES
1. Remove the dust caps from the eyepiece
tubes.
2. Insert the eyepieces into the eyepiece tube.
Be sure to install the eyepieces all the way
into the tube.
3. Set the eyepiece diopter scale for each
eyepiece to 0.
Adjusting Interpupillary Distance (Fig. 6)
Different users have different interpupillary
distances (this distance is between the centers of
the pupils of each eye). When the operator of the
microscope changes, it will be necessary to
adjust the interpupillary distance.
While looking through the eyepieces, hold the left
and right eyetubes of the viewing head and
adjust the eyetubes by opening or closing them
until the left and right fields of view coincide
completely and you are able to see a complete
circle.
Adjusting Diopter Ring/Focusing (Fig. 7)
Set the diopter rings ② of both eyepieces to "0"
position. (Do this when users change, because
different users will have different diopter
settings.)
Place an easy-to-observe specimen on the stage
plate, i.e., a coin.
Rotate the zoom knob ③ to the highest
magnification, and turn the focusing knob ④ to
focus the specimen.
Rotate the zoom knob ③ to the lowest
magnification, looking only into the left eyepiece,
adjust the diopter ring on left eyepiece to focus
the specimen. Then repeat this procedure for the
right eyepiece.
NOTE: The working distance (the distance
between the microscope objective to the top of the
specimen) of the microscope is 186mm (with 0.5X
objective, included).
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