Olympus CHA-P Manuel d'instruction - Page 10
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V.
OPERATION
1. Adjustment of Minimum
Line Voltage
The minimum voltage required for the light source can be adjusted with the rheostat trim-
mer screw at the microscope base plate in accordance with the line voltage and frequency.
The built-in rheostat incorporates a thyristor in its semi-conductor circuit for the following
advantages:
(a) Extremely fine adjustment of light intensity can be easily achieved.
(b) Flickering of the bulb filament is eliminated and the light intensity is stabilized.
(c)
Increased
life expectancy
of the bulb.
For
adjustment
of the minimum
line voltage, ascertain
that the voltage selector switch
is set to conform
with
the
local
mains
voltage, and the sliding control lever 2)
is
positioned
closest
to
you
(low
voltage),
and
then
activate
the main
switch @).
If the bulb is dimly lit,
the secondary voltage is correct.
If it is not lit at all,
rotate the rheostat trimmer screw @) gradually with a
coin,
until
the bulb
is dimly
lit;
then
push the sliding
control
lever forward
in order to obtain optimum
light
intensity. (Fig.
1)
Fig. 1
2. Interpupillary Distance and Diopter Adjustments
1) Insert the eyepiece @) with cross hairs into the right
eyepiece
tube
of
the
binocular
tube,
aligning
the
©
positioning slot @) and positioning pin ©). (Fig. 2)
* When the eyepiece positioning pin is inserted into the
lower slot on the tube, the cross lines in the eyepiece
coincide with the vibration direction of polarizer and
analyzer at O" settings. When inserted into the other
slot,
the
cross
lines
are
at 45°
to the direction
of
vibration.
(This
is the
same with
the
monocular
tube.)
Fig.2
Then
insert the other eyepiece into the left tube.