Gima N-126 Handbuch Seite 23

23
Condenser Adjustment (fig. 16)
Turn the condenser focus knob 1 to move the
condenser up and down. Raise the condenser
when using the high magnification objective,
and descend it when using the low magnifica-
tion one.
1. Focus the specimen with 10x objective.
2. Adjust the condenser focus knob 1 to get a
clear image of the field iris diaphragm.
3. Turn the condenser centering knobs 2 to
center the image of field iris diaphragm in the
field of view.
• The condenser and the objective are coaxial.
It has been adjusted before leaving factory, so
the user needn't to adjust them by self
• The highest position of the condenser has
been adjusted too. It also needn't any user's
operation. (The top surface of the condenser
is 0.03 mm - 0.4 mm lower than the stage top
surface.)
Aperture Iris Diaphragm Adjustment (fig. 17)
Turn the aperture iris diaphragm stick 1 to adjust
the aperture iris diaphragm.
• The aperture iris diaphragm is designed for
the adjustment of the numerical aperture, not
for the brightness.
Generally, setting the aperture iris diaphragm
to 70- 80% of the N.A. of the objective in use
will provide an image with good contrast. If
you want to observe the image of the aperture
iris diaphragm, remove one eyepiece and look
through the tube. You will see a dark circle en-
croaching on the bottom of the tube.
Adjusting the Interpupillary Distance
(fig. 18)
The interpupillary distance range: 47mm-78mm
While looking through the eyepieces, move both
eyepieces round until the left and right fields of
view coincide completely.
ENGLISH
fig. 16
1
fig. 17
fig. 18
2
1