4. 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.
C. Mechanical Maintenance
1. Adjusting the tension of the focus.
Tension comes pre-adjusted by the factory. The best point of tension is that which permits
the focus knobs to move as loosely as possible, without the head sliding down with its own
weight.
The tension adjustment collar for focussing (Fig.5) is situated between the focussing knob
(13) and the head holder (11).
NB:
In the model ST-37, the tension adjustment collar can be found between the focus knob
(13) and the arm (15).
a. Loosen the screw located in the collar hole with the 2mm hexagonal key.
b. To increase the tension, turn the collar anti-clockwise; to decrease it, turn the collar
clockwise.
c. Re-tighten the hexagonal key.
-9-
Fig. 4
