Aperture Diaphragm; Use With Rechargeable Batteries; Battery Replacement; Use Of The Locking Screw - Optika Italy B-60 Serie Manual De Instrucciones

8.7

Aperture diaphragm

• The Numerical Aperture (N.A.) value of the ap-
erture diaphragm affects the image contrast. In-
creasing or reducing this value one can vary res-
olution, contrast and depth of focus of the image.
1. Move the diaphragm lever ① (Fig. 12) toward left
or right to decrease or increase the N.A. value.
• With low contrast specimens set the numerical ap-
erture to about 70%-80% of the objective's N.A. If
necessary, remove on eyepiece and, looking into
empty sleeve, adjust the condenser's diaphragm
in order to obtain an image like the one in Fig. 13.
8.8

Use with rechargeable batteries

• When the microscope is connected to the power
supply the batteries are recharged normally.
• When the microscope is disconnected from the
power supply, the batteries start operating by
powering the microscope.
8.9

Battery replacement

1. Open the battery compartment placed in the low-
er part of the frame. (Fig. 14)
2. Replace batteries, respecting polarity.
3. Close the battery compartment.
8.10

Use of the locking screw

The locking screw prevents the stage from rising
above a certain limit avoiding contact between the
objective and the slide, so as not to damage the lens
and do not break the slide.
The screw is preset at the factory, but to adjust the
position according to your preferences, act like this:
1. Insert the highest magnification objective and fo-
cus the specimen.
2. Unscrew the locking screw ② and raise the stage
until the objective is almost in contact with the
slide. (Fig. 15)
3. Lock the locking screw.
①
APERTURE
DIAPHRAGM
FIELD OF VIEW
Page 12
F ig. 12 F ig. 12
70-80%
30-20%
F ig. 13 F ig. 13
F ig. 14 F ig. 14
②
F ig. 15 F ig. 15