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3.
Electrical
Failures
Causes
•
Actions
• No electricity obtained
• Connect the cord to socket
• No lamp bulb attached
• Attaching
• Lamp bulb blown
) Replacement
• Fuse blown
• Replacement
• Input voltage not adjusted to
) Turn the change-over switch on
house current voltage (for European
the microscope bottom
districts only)
• House current voltage fluctuates
• Use transformer or the like
(for adequate voltage)
• Not specified lamp bulb used
I
Use 6V 20W specified lamp bulb:
(Halogen bulb: PH I LIPS 7388)
• Too high voltage of house current
) Use transformer for adjustment
• Condenser not centered ) Centering (Refer to P. 10)
• Condenser aperture too much c1osed---.
Open it properly (Refer to P. 10)
illumination
• Too low position of condenser
• Correct positioning
(Refer to P. 10)
mp bulb used
• Use 6V 20W specified Halogen
bulb (PH I LIPS 7388)
ens (condenser,
• Cleaning
iece, field lens, filter)
• Too low voltage
• Raise the voltage
• Not specified fuse used ) Use 1A (250V) or O.5A (250V)
• Lamp bulb going to be blown
• Replacement
• Lamp bulb not inserted to the limit
• Secure connection
• Fuse holder not firmly fastened
• Firm fastening
• Irregular change of house current
• Use stabilizer
• Lamp bulb insufficiently
inserted
• Positive connection
4.
Photom icrography
Failures
Causes
.
· Actions
• Improper focusing----.
• Viewing into the finder and turning diopter ring,
picture
bring double crosshair into focus. Moving the eye
laterally, rotate fine focus knob, until no parallax
separation appears between the image and double
crosshair .
• At lower magnifications use focusing telescope in
addition.
23
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