Olympus BHT Buku Petunjuk - Halaman 21
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Halaman Cetak
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Phenomenon
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Cause
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Remedv
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1
C)
Lamp & o f f
and
on
Bulb filament
is likely t o
/
Replacebulb.
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burn out.
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r
Loose electric connections.
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Check all connections.
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d) Bulb burns out frequently.
Line voltage selector switch is
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Match
selector
switch
to
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not matched with local mains
mains voltage.
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1
3. Coarse and Fine Adjustments
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voltage.
Bulb is not standard one.
a) Coarse adjustment knob is
too tight.
Use standard bulb.
Tension adjustment ring is
tightened too much.
User is trying to raise stage
above the focusing limit im-
posed by the engaged pre-
focusing lever.
Loosen ring properly.
Unlock lever.
b)
Stage drops or specimen
goes out of focus during
observation due to slipping
fine adjustment knobs.
C) Stage cannot be raised to
the upper limit.
Tension adjustment ring is
too loose.
Pre-focusing lever is engaged
in lower than focusing posi-
tion.
Tighten ring properly.
Unlock lever.
d) Stage cannot be lowered
to the lower limit.
e) Objective front lens hits
specimen before coming
into focus.
Stage is mounted too low.
Specimen is placed on stage
upside down.
Raise stage mount with Allen
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wrench.
-
Reverse specimen
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4. Observation Tubes
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Correct the interpupillary dis-
tance.
a) l ncomplete binocular vi-
sion.
1
Diopter adjustment is incom-
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Complete the diopter adjust-
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l nterpupillary distance is not
correctly adjusted.
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plete.
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ment.
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nocular vision.
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nocular observation tube, look
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Right and left eyepieces are
not matched.
User is unaccustomed to bi-
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1
1
at a far away obiect.
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Use a pair of matched eye-
pieces.
Prior to looking into the bi-
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5. Stage
a) l mage easily goes out of
focus when you touch the
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on the east-west traverse.
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sitioned.
1
stage.
b) Specimen stops midway
Stage is not correctly locked.
Clamp stage securely.
Specimen is not correctly po-
Adjust specimen position.