Optika Italy B-290 Serie Mode D'emploi page 17

9. Use of the microscope
9.1 Switching on the microscope
1. Operate on the main switch
microscope, moving the selector on "I" (Fig. 22)
• For "LD" models only: there is a three-position switch on the
rear of the stand: position "I" turns on the transmitted light,
position "II" turns on the fluorescence and position "O" turns
off the microscope.
9.2 Light intensity adjustment
1. Operate on the light intensity dial to increase or decrease the
illumination intensity. (Fig. 23)
9.3 Coarse focus tension adjustment
• Adjust the tension using the provided tool.
The coarse knob tension is preset in the factory.
1. To modify the tension according to personal's needs, rotate
the ring using the provided tool (Fig. 24).
• Clockwise rotation increases the tension.
• If the tension is too loose, the stage could go lower by itself or
the focus easily lost after fine adjustment. In this case, rotate
the knob in order to increase the tension.
9.4 Stage
Stage accepts standard slides 26 x 76 mm, thickness 1,2 mm
with coverslide 0,17mm. (Fig. 25)
1. Open the spring arm of the slide holder
from the front on the stage.
2. Gently release the spring arm of the slide holder.
• A sudden release of the spring arm could cause the fall-
ing of the slide.
placed in the rear side of the
①
and place the slide
②
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①
②
F ig. 22 F ig. 22
F ig. 23 F ig. 23
F ig. 24 F ig. 24
F ig. 25 F ig. 25