MEC2 INVERTED METALLURGICAL MICROSCOPE
UNITRON
®
73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com
17
TROUBLESHOOTING
Under certain conditions, performance of this unit may be adversely affected by factors other than
defects. If a problem occurs, please review the following list and take remedial action as needed. If you
cannot solve the problem after checking the entire list, please contact your local dealer for assistance.
OPTICAL
PROBLEM
CAUSE
CORRECTIVE MEASURE
Darkness at the periphery or uneven
brightness in the field of view
Revolving nosepiece not in click
stop position
Turn the nosepiece to click-stop
position so the objective is in the
optical path
Dirt or dust on the viewfield
Dirt or dust on the lens, eyepiece,
condenser, objective, collector lens
or specimen
Clean the lens
Poor image quality
Condenser aperture is closed or
open too much
Condenser is positioned too low
Open or close properly
Position the condenser at the upper
limit
IMAGE PROBLEMS
Image moves while focusing
Specimen rises from stage surface
Revolving nosepiece is not in the
click-stop position
Secure the specimen with the holder
Turn the nosepiece to the click-stop
position
Image tinged yellow
Blue filter not used
Lamp intensity is too low
Use daylight blue filter
Adjust the light intensity by turning
the intensity control dial
Image is too bright
Lamp intensity is too high
Adjust the light intensity by turning
the intensity control dial
Insufficient brightness
Lamp intensity is too low
Aperture diaphragm closed too far
Condenser position is too low
Adjust the light intensity by turning
the intensity control dial
Open to the proper setting
Position the condenser to the upper
limit
Lamp does not light when switched
on
No electrical power
Lamp bulb burnt out
Fuse blown out
Check power cord connection
Replace bulb
Replace fuse
Slippage of focus when using the
coarse focusing knob
Tension adjustment is set too low
Increase the tension on the focusing
knobs
Fine focus is ineffective
Tension adjustment is set too high
Loosen the tension on the focusing
knobs
