3B Scientific Binocular Microscope Model 500 LED with Polarisation Equipment - Manual (Page 3)

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Subject to technical amendments
© Copyright 2013 3B Scientific GmbH
can be tested by rotating the polariser or the
specimen itself.
A birefringent object, when rotated continuously,
shows up brightly after each 90° rotation and is
dark between these positions. In contrast, ob-
jects that are isotropic and not birefringent re-
main dark in all positions.
4.3 Changing the fuse
• Turn off the power switch and unplug the
mains plug.
• Unscrew the fuse holder on the back of the
stand base with a screwdriver.
• Replace the fuse and reinsert the holder in
its socket.
5. Storage, cleaning and disposal
• Keep the microscope in a clean, dry and
dust free place.
• When not in use always cover the micro-
scope with the dust cover.
• Do not expose it to temperatures below 0°C
and above 40°C and a max. relative humid-
ity of over 85%.
• Always unplug the mains plug before clean-
ing or maintenance.
• Do not clean the unit with volatile solvents or
abrasive cleaners.
• Do not disassemble objective or eyepieces
to attempt to clean them.
• Use a soft linen cloth and some ethanol to
clean the microscope.
• Use a soft lens tissue to clean the optics.
• The packaging should be disposed of at
local recycling points.
• Should you need to
dispose of the equip-
ment itself, never throw
it away in normal do-
mestic waste. Local
regulations for the dis-
posal of electrical
equipment will apply.