Olympus BHTU Manual de instrucciones - Página 20

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Phenomenon
Cause
Remedy
1
el Resolution problems:
LB
objectives
other
than
Use Olympus LB series objec-
series are used.
tives.
•
Image is not sharp.
o
bjectiv8
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