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Instruction manual 50170101
Version 1 April-08
the AC electric current in the base of current 220 V, 50 Hz ±10% provided with earth
wire and the other end to the microscope connector. The tension should be 220 V, 50 Hz ±
10%.
Neither the manufacturer nor the distributor will assume any responsibility for the
damages produced to the equipment during its installation or damages to persons suf-
fered by the improper use of the electric connection. The tension should be 220 V, 50
Hz ±10%.
Setting up
Light controls
The on/off switch
(1.19)
and the light intensity control
(1.18)
are located at the lower
right side of the microscope. The electrical system is protected by fuses; the fuse box is
located near the socket.
Turn the light on
(1.19)
and adjust the light intensity by using the control knob
(1.18).
If
it seems that light does not work please check the adjustment of the light intensity control
(1.18)
.
Focusing
Focusing adjustment is accomplished by using the large coarse adjustment knobs
(1.10)
located comfortably on each side of the frame. Fine adjustment is accomplished using the
smaller knobs
(1.11)
located on the same focus shaft. This coaxial arrangement allows for
easy, precise adjustment without drift or discomfort.
Focus control: using the objective with lesser magnification, raise the stage by using the
coarse adjustment knob until the image of the sample appears. Then, move the fine adjus-
tment knob until the image is focused.
Focus tension adjustment: depending on the observant, the tension of the coarse adjus-
tment knob can be modified, since it is provided with a friction control ring
(2.1)
that is
placed next to the right coarse adjustment knob of the microscope
(figure 2)
. Turning the
friction control ring toward the rear of the microscope increases the tension, and toward
the front of the microscope loosens it. Avoid loosening it excessively since this could pro-
duce the fall of the stage together with problems on focusing accuracy.
Figure 2
2.1 Friction control ring
2.2 Upper focus limit control
2.1
2.2
Version 1 April-08
Instruction manual 50170101
Page 17
Pre-focusing or focus limit control: There is also a device for the control of the upper
focus limit
(2.2)
located next to the left coarse adjustment knob
(figure 2)
. This device
avoids that the plate raises beyond a point, that can be determined once the sample has
been focussed, and this fact can avoid possible accidental collisions during the observa-
tion. This mechanism also allows the possibility of getting a quick focusing, accelerating
the observation process when working with different samples.
After focusing the sample with the low magnification objective, rotation of the lever
toward the front of the microscope will set an upper limit on the coarse adjustment move-
ment. After changing samples or objectives, focusing is easily accomplished by rotating
the coarse adjustment knob to reach the pre-focused position, then making fine adjus-
tments with the fine adjustment knob. The fine adjustment is not affected by using the
upper focus limit control.
Diopter compensation and interpupillary distance adjustment
(Figure 3)
Diopter compensation: a more or less marked dif-
ference in the focusing is appreciated by closing
alternatively one eye, then the other; the dioptre
compensation corrects this effect. The microscope is
provided with a dioptre compensation ring at the left
eyepiece holder
(3.1)
. First of all, adjust the dioptre
ring to zero and looking through the right eyepiece,
focus the sample specimen using the coarse and fine
adjustment knobs. Once the sample is focused, look
through the left eyepiece and adjust the dioptre com-
pensation ring until obtaining a clear, sharp image.
Interpupillary distance: Adjust the interpupillary
distance by separating or joining the eyepieces until
there is a total fusion of the two images.
Note: once the values of interpupillary distance and dioptre compensation are found it
will be very useful to learn them by heart, mostly if the microscope is shared with other
users. This is highly advisable to avoid repeating the adjustment each time the micros-
cope is used.
Mechanical stage controls
The triple layer stage presents the following knobs:
Cross movement knob
(1.20)
Longitudinal movement knob
(1.21)
Stage quick adjustment knob
(1.12)
, to move quickly the stage cross and longitudinally.
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