Chapter 5 Troubleshooting
99
Problem
Cause
Countermeasure
Dirt or dust is seen in the
view-field.
The aperture diaphragm is stopped down too
far.
Open the diaphragm to a suitable size.
(p.42)
Dirt or dust exists on the intermediate
magnification unit.
Clean the components.
(p.102)
Dirt or dust exists on the lens, eyepiece, filter
or sample.
Clean the components.
(p.102)
Dirt or dust exists on the scale slider or grain
scale slider.
Clean the components.
(p.102)
The upper surface of the condenser is not
clean.
Clean the components.
(p.102)
Diascopic microscopy
The condenser position is too low.
Adjust the condenser focus knob to enable the
field diaphragm image focus on the sample
surface. (p.59)
Dirt or dust exists on the lens, eyepiece, filter,
or sample.
Clean the components.
(p.102)
Viewing is poor (too much/little
contrast or poor resolution).
The current objective is not suitable for the
microscopy.
Use a suitable objective.
(p.32)
Dirt exists on the lens for putting the eyepiece
tube or eyepiece tube entrance lens.
Clean the components.
(p.102)
The aperture diaphragm is stopped down too
far.
Open the diaphragm to a suitable size.
(p.42)
Epi-fl microscopy
The current fluorescent unit is not suited for
the sample.
Use a fluorescent unit suited for the sample.
(p.50)
Diascopic microscopy
The condenser position is too low.
Adjust the condenser focus knob so that the
field diaphragm image is focused on the
sample surface.
(p.59)
The revolving nosepiece is not attached
correctly.
Install the revolving nosepiece correctly.
(p.78)
The revolving nosepiece is not placed to a
click-stop position. (The objective is not placed
in the optical path).
Turn the revolving nosepiece to the click-stop
position. (p.39)
The focus is uneven.
The sample holder is slanted.
Attach the sample holder correctly.
(p.80)
The image is elongated; the image
shifts during focus.
The revolving nosepiece is not attached
correctly.
Install the revolving nosepiece correctly. (p.78)
The revolving nosepiece is not placed to a
click-stop position.
Turn the revolving nosepiece to the click-stop
position.
(p.39)
The stage is tilting.
Attach the stage correctly.
(p.80)
The microscope is not installed on a flat
surface.
Install the microscope on a flat and level
surface.
Diascopic microscopy
The condenser has not been centered.
Center the condenser.
(p.58)
The NCB11 filter is not used.
Place the NCB 11 filter into the optical path.
(p.40)
The image is tinged yellow.
The lamp voltage is too low.
Increase the brightness with the brightness
control dial, and adjust the brightness with ND
filters.
(p.30, 40)
The image is too bright.
The lamp voltage is too high.
Adjust the brightness with the brightness
control dial; place an ND filter into the optical
path. (p.30,
40)
Содержание ECLIPSE MA200
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