Labomed Sigma User Manual - page 7
Cleaning procedure:
Place the objectives and/or eyepieces on adust-free surface (e.g. fresh aluminum foil). All other optical components to
be cleaned should be as accessible as possible.
1. Blow all loose dust particles away with a dust blower.
2. Remove all water-soluble dirt with distilled water. If this is unsuccessful repeat using a solution of diluted hand
soap liquid. Remove any remaining residue with a dry cotton swab.
3. To remove oil, use a solution of diluted hand-soap liquid initially. If this does not produce a satisfactory result,
repeat the cleaning using a solvent (Optical Cleaning Solution 85% petroleum ether and 15% isopropanol).
4. Grease must always be removed using a solvent.
5. Cleaning is achieved by using a spiral motion from the center to the rim. Never wipe using zig-zag movements as
this will only spread the dirt. With larger optical surfaces (e.g. tube lenses) the spiral motion starts initially at the rim
before moving to the middle and is only then followed by a center to rim cleaning motion. Normally several spiral
wipes are recommended.
We recommend pure, volatile petroleum ether or Optical Cleaning Solution as explained in point 3 above.
Wipe using a spiral movement. Do not use a zig-zag motion!
2. Cleaning of painted surfaces :
Avoid the use of any organic solvent ( e.g. thinner, xylene, ether, alcohol etc.) for cleaning of painted surfaces of
the instrument. Painted surfaces can be cleaned with a very lightly moistened micro fiber cloth. Loose dust and
other dirt can be removed using a brush of soft hair used exclusively for this purpose.
3. Cleaning of plastic surfaces:
Sigma microscope frame is made up of special grade plastic which can be cleaned with mild soap solution. Do not
use acetone for cleaning stage condenser lens.
Caution:
Do not use aggressive organic solvent such as acetone for cleaning painted surfaces and plastic parts of
the microscope.
4. Never attempt to dismantle :
Never attempt to dismantle the instrument so as to avoid the possibility of impairing its operational efficiency and
accuracy.
5. Periodical checking :
To maintain the performance of the instrument, we recommend customers have their microscopes serviced
periodically by a factory authorized dealer/rep. For details, contact your nearest dealer or Labo America’s main
office in California.
zig-zag motion (X)
spiral motion ( )
!
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Sigma