4. Operating the adjustment BMS INVERTED BIOLOGICAL
4-1 Microscope base
4-1-1 Turning on the lamp
（
fig.16
）
Connect the power, turn on the main
switch
①
(shown on the fig.16)which on the bottom
side of the base to “
－
”(on).
4-1-2 Adjusting the brightness
（
fig.17
）
Turning the brightness adjustment knob
clockwise, the voltage raise, and the brightness
strengthen; whereas turning at the contra direction,
the voltage decline, and the brightness weaken.
◎
Using the lamp in a low voltage
condition, will prolong the service life.
4-1-3 Adjusting the Tension Adjustment
Collar
（
fig.18
）
★
The tight tension of the coarse focus knob
②
had
already adjusted before leaving factory.
◎
How to adjust the tight tension
Turning the tension adjustment collar
①
. while
revolving at the direction which shown by the
arrowhead on the figure, the tight tension of the coarse
focus knob
②
is increasing
；
and if at the contra
direction ,the tight tension will decline.
If the nosepiece dropped automatically, or the
specimen defocused soon even you focus with the
fine focus knob
③
. It means the coarse focus knob
is too loose, you should screw it down at the
direction shown by the arrowhead in the figure18.
10
Figure 16
Figure 18
Figure 17
1
2
1
3
1
