Olympus BHTU - Page 20

Phenomenon Cause
Remedy
1
el
Resolution problems:
LB
objectives other than
Use Olympus LB series objec-
series are used.
tives.
•
I mage is not sharp.
objectiv8
not
correctly
Click nosepiece into place.
I
IS
•
Insufficient contrast.
positioned in
the light path.
•
Image details lack defi-
nition.
Objective correction collar is
Rotate correction collar, keep-
not adjusted correctly.
ing
specimen in fine
focus
until
optimum resolution
is
obtained.
Dust on objective
front lens
Clean
front lens.
Immersion objective
is not
Use immersion oil.
used with immersion oil.
Bubbles in immersion oil
Remove bubbles
(and
reap-
ply oil).
Immersion
oil designated
by
Use Olympus
immersion oil.
Olympus is not w~ed.
Dirty specimens
Clean.
Dust on condenser
lens
fl
Field
of view is partially
Objective
is
not correctly
Slightly rotate nosepiece until
out of focus, or image is
positioned in the light path. it clicks in place.
partly out of focus.
Specimen
is
not correctly
Place specimen slide correctly
positioned on stage.
on stage, and place
stage clips
open it.
gl
Specimen image
is partial-
Objective
is not correctly
Slightly rotate nosepiece until
Iy out of focus.
positioned in the
light path.
it clicks into place.
Condenser
is not centered.
Center condenser.
h)
Field
of
view becomes
Condenser
is not
correctly Center condenser.
only slightly
brighter by
centered.
increasing voltage.
Condenser
is lowered too
Adjust condenser height.
much.
2.
Electric System
al
Illuminator is too bright
Line
voltage
selector switch
Match
selector switch
to
(or too dark)
even when
is not matched with local
mains voltage.
adjusting
control lever.
mains voltage.
b)
Voltage for illuminator
cannot be raised.
cl
Lamp
goes off and on.
Bulb
filament is
likely
to
Replace bulb.
burn out.
Loose electric connections.
Check all connections.
d)
Bulb burns out frequently.
Line voltage selector switch is
Match selector switch to
not matched with local mains mains voltage.
voltage.
Bulb
is not standard one.
Use standard bu lb.
19