Olympus CHA Gebrauchsanweisung - Seite 9

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Fig. 1

OPERATION

•

Summary of Putting the Microscope in Operation

Match the line voltage selector switch to local mains voltage (for CHAI. (See

page 5,)

2. Switch on the light source.

3. Adjust the trimmer screw. (See page 7.1

4. Place a specimen slide on the stage. (See page

7.)

5. Loosen the automatic pre-focusing lever.

6. Coarse focus with a low power objective.

7. Make interpupillary and diopter adjustments. ISee page 8.)

8. Swing in the desired objective.

9. Adjust light intensity.

10.

Fine focus.

11.

Lock the automatic pre-focusing lever. (See page 8.1

12.

Adjust the aperture iris diaphragm. ISee page 9.1

A. Adjustment of Minimum Line Voltage (CHA)

The minimum voltage required for the ligh

source can be adjusted with the rheostat

trimmer 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.

(bl Flickering of the bulb filament is eliminated and the light intensity is stabilized.

Icl 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

is positioned closest to you (low voltage). and then

activate the main switch

CD.

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.

Placing a Specimen Slide on the Stage

NOTE:

1) Cover glass:

Olympus objectives with an engraving "0.17" are corrected for

use with cover glasses of 0.17mm thickness (No. 1%).

2) Specimen slide:

It is recommended to use specimen slides of O.8mm to 1.5mm

thickness.

However, for use with the immersion darkfield condenser

BH-DCW (optionally availablel. a specimen slide between

O.8mm to 1.2m m th ickness is preferable.