Optika Italy ECOVISION Serie Mode D'emploi page 13

10. Troubleshooting
Review the information in the table below to troubleshoot operating problems.
PROBLEM
I. Optical Section:
LED operates, but field of view remains
dark.
Dirt or dust is visible in the field of view. Dirt/dust on the specimen
Image looks double
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. Electric Section:
The LED doesn't turn on.
The brightness is not enough
The light blinks
CAUSE
Power supply is unplugged.
Brightness is too low
Batteries discharged
Dirt/dust on the eyepieces
Aperture diaphragm is stopped down
too far
Revolving nosepiece is in an incorrect
position
Aperture diaphragm is too closed or to
open
Dust or dirt on lenses (condenser, ob-
jectives, eyepieces and slide)
For transmitted light observation, the
coverglass thickness must not exceed
0.17mm
Focus is not even
The nosepiece is not in the center of
the light path
The specimen is out of place (tilted)
The optical performance of the sample
cover glass is poor
No power supply
The brightness adjustment is low
The power cord is poorly connected
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SOLUTION
Connect
Set brightness to a proper level
Charge the batteries
Clean the specimen
Clean the eyepieces
Open aperture diaphragm
Move the nosepiece to a click stop
Adjust aperture diaphragm
Clean thoroughly
Use a coverglass with thickness
0.17mm
Slide holder is not flat. Move the speci-
men to a flat position
Turn the nosepiece to a click stop
Place the specimen flat on the stage.
Use a cover glass of better quality
Check the power cord connection
Adjust the brightness
Check the power cord