Light Intensity Adjustment; Coarse Focus Tension Adjustment; Coarse Upper Limit Lever - Optika Italy B-510 Serie Manuel D'utilisation

9. Use of the microscope (B-510BF / B-510ERGO / B-510-2-2F-3-5)
9.1

Light intensity adjustment

Operate on the light intensity adjustment knob to turn
ON / OFF the microscope and to increase / decrease
the illumination voltage ①. (Fig. 29)
• For B-510LD1 / B-510LD2 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

Coarse focus tension adjustment

• Adjust the tension using the provided tool.
The coarse knob tension is pre-setted in the factory.
To modify the tension according to personal's needs,
rotate the ring ② using the provided tool. (Fig. 30)
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.
9.3

Coarse upper limit lever

The upper limit knob has two functions: prevent the
contact between slide and objective and acts as
"focus memory".
After focussing the specimen, pull the lever ③ toward
the front of the microscope and lock it. (Fig. 31). In
this way the focus upper limit is set. 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.
Page 28
①
Fig. 29
②
Fig. 30
③
Fig. 31