Optika Italy B-383 Series, Instruction Manual

Page: 12 / 138

Page 12
10.5 Coarse focus tension adjustment
• Adjust the tension using the provided tool.
The tension of the coarse focusing knob is factory preset.
1. To modify the tension according to personal’s needs, rotate
the ring ① . (Fig. 13)
• 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 .
10.6 Coarse upper limit lever
The upper limit knob has two functions: prevent the contact
between slide and objective and acts as “focus memory”.
1. After focusing the specimen, pull the lever
③
toward the
front of the microscope and lock it. (Fig. 14)
• In this way the focus upper limit is set.
2. Now one can lower the stage with coarse focus knob, replace
the specimen and raise again the stage up to the upper limit:
specimen will be in approximate focus and will need a fine
adjustment to get the proper focus.
• Fine focus movement is not affected by the coarse
focus lock.
• To unlock, move the lever in the opposite direction to the
one used for the locking.
10.7 Stage
Stage accepts metallurgical samples with thickness max 15 mm,
placed on a standard support 26 x 76 mm.
1. Open the spring arm of the slide holder
③
and place frontally
the slides on the stage. (Fig. 15)
2. Gently release the spring arm of the slide holder.
• A sudden release of the spring arm could cause the
falling of the slide.
10.7.1 Use of the glass plate
When using embedded metallographic specimens it may be
necessary to use the square glass plate.
1. Open the spring arm of the slide holder
③
and place frontally
the glass plate by aligning the positioning notch
④
so that
the movable arm fits directly into the notch. (Fig. 16)
2. Gently release the spring arm of the slide holder.
• The glass plate has a positioning notch to facilitate
insertion of the movable arm.
• This notch is provided and does not indicate a glass
breakage.
F Fig. 13 ig. 13
①
F Fig. 16 ig. 16
③
F Fig. 14 ig. 14
LOCK
UNLOCK
②
F Fig. 15 ig. 15
③
④