Troubleshooting - VWR isiScope 300 Serie Manual De Instrucciones

11. Troubleshooting

Review the information in the table below to troubleshoot operating problems.
PROBLEM
I. Optical Section:
LED operates, but field of view
remains dark
The edge of the field of view is
vignetted or the brightness is
asymmetric.
Dirt or dust is visible in the field of
view
Visibility is poor.
• Image is not good.
• Contrast is poor.
• Details are indistinct.
• Image glares
One side of the image is out of
focus
II. Mechanical Section:
Coarse focus knob is hard to turn
Focus is unstable
III. Electrical Section:
LED doesn't turn on.
Brightness is not enough
Light blinks
IV. Observation Tube:
Field of view of one eye does not
match that of the other.
V. Microphotography:
Bright spots appear on the image
CAUSE
Power supply is unplugged.
Brightness is too low
The incident illuminator is not
correctly oriented
Dirt/dust on the specimen
Dirt/dust on the eyepieces
The lenses (eyepieces, additional
lens) are dirt
The specimen is out of place
(tilted)
Tension adjustment ring is too
tight
Tension adjustment ring is too
loose
Power supply not connected
Brightness setting is too low
Power supply not well connected
Interpupillary distance is incorrect. Adjust interpupillary distance.
Incorrect diopter adjustment.
Your view is not accustomed to
microscope observation.
Stray light entering in the mi-
croscope through eyepieces or
camera viewfinder
9
SOLUTION
Connect .
Set brightness to a proper level
Change the angle of the incident
illuminator.
Clean the specimen
Clean the eyepieces
Thoroughly clean all the optical
system
Place the specimen flat on the sta-
ge.
Loosen tension adjustment ring
Tighten tension adjustment ring
Check for proper connection
Adjust brightness
Check for proper connection
Adjust diopter.
Upon looking into eyepieces, try lo-
oking at overall field before concen-
trating on specimen range. You may
also find it helpful to look up and into
distance for a moment before loo-
king back into microscope.
Cover eyepieces and viewfinder with
a dark cloth