IRB20 Inverted Microscope Operation Instructions
5
Fein
Place the filter (1) inside
the filter holder (2), and
insert into the filter slot on
the condenser.
The tension of the coarse focusing knob can be
adjusted by holding the tension adjustment ring (1)
and rotating it. Turning the adjustment ring clockwise
will increase the focus tension and turning it counter-
clockwise will decrease the tension.
If the stage is drifting (falling) out of focus, tighten the
focus tension ring (clockwise) to create more tension
and keep the stage from drifting.
Do NOT rotate the coarse & fine focus knobs in
opposite directions at the same time!
Adjust the eyetubes to set the interpupillary
distance for your eyes. If multiple people
use the microscope daily, note the number
of your interpupillary setting for ease of
future setup.
Set both eyepieces to “0” scale on the
diopter. Look through the microscope
with only one eye and focus. Now
close the eye you just looked through
and look through the other eyepiece
with the other eye only. If the sample is
out of focus, adjust the diopter on that
eyepiece until it is clearly in focus.
