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3. Changing the batteries.
a. Unplug the charger.
b. Remove the screws from the bottom plate of the
microscope base , and move away the bottom plate
carefully, (as referred to Fig.1)
c. Release the screw from the battery chamber (Fig.4), then
slide off the lid.
d. Insert the batteries to the battery chamber according to
the indications on the chamber (Fig.4).
e. Slide back in the lid carefully and tighten firmly with the
original screw.
f.
Replace back the bottom plate of the microscope and
tighten it with the screws as shown in Fig. 1.
E. Mechanical maintenance.
1.
Adjusting the tension of the coarse focus knob.
The collar to adjust the coarse focus tension (Fig. 5)
is situated between the coarse focus knob (14) and
the arm (12).
The tension of the coarse focus knob comes pre
adjusted by the manufacturer. The optimum tension
point is that which permits fluid movement of the
knobs, without the stage (6) sliding down on its own.
a. To adjust the tension, first loosen the screw
situated in one of the collar holes, with a 2mm
hexagonal key.
b. To tighten the tension of the coarse focus
knobs, turn the collar anti-clockwise; or to
loosen it, turn clockwise.
c. Tighten the hexagonal screw.
2.
Adjusting the rack stop.
The 40X objective uses a retractable security system to avoid damage to the specimen slide or
to the front of the lens, should the two come into contact. Additionally as a security measure, the
microscope includes a rack stop screw that regulates the upward movement of the stage. The
rack stop screw comes pre-adjusted by the factory for standard slides with a 0.17mm thick
cover slip. However, for observing other types of slides adjustment may be necessary.
a.
Loosen the rack stop screw. (13)
b.
Unscrew the knurled screw. (13)
c.
With the fine focus knob at mid-range, focus on specimen slide, using only the coarse
focus knob (12), firstly with the 4X objective (4), then with the 10X.
d.
Tighten the rack stop screw just until the stage (6) can not ascend.
e.
Tighten screw.
Tension
adjustment
collar
-8-
Fig. 4
Fig. 5
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