National DC4-211 Instructions Manual page 8

Cleaning Your Microscope
This microscope was designed to function with minimal maintenance, but certain components should be cleaned
frequently to ensure ease of viewing. The power switch should be turned off or the microscope should be
unplugged when not in use.
Do not disassemble your microscope
Disassembly may significantly affect the performance of the instrument, and may result in electric shock or injury
and will void the terms of the warranty.
Never attempt to dismantle any parts other than the ones described below. If you notice any malfunction, contact
your nearest Swift Optical supplier.
Optics
Keeping the optics of your microscope clean is essential for
obtaining clear images. Choosing the best cleaning method
depends on the nature of the optical surface and type of dirt.
Dirtiness on the image may be caused by the following
variables:

Dirt on the outer or inner eyepiece lens.

Dirt on the front lens of the objective.

Dirt on the upper lens of the condenser.

Dirt on the surface of the sample slide glass.

Dirt on the upper lens of illuminator.

Dirt on other optical components of the microscope such as
mirrors, lamps, filters, intermediate lenses ...
Objectives are the optical component of the microscope that require the most maintenance. Because for their
actual use, they can get dirty easily.
For objectives that work without oil (dry): The first step is to carefully unscrew the objective from the nosepiece.
(1) Proceed by cleaning it using pressurized dry air - or an air gun if available – and, if after this is done we still
observe spots of dust or dirt, (2) Clean with a cotton swab dampened with a low graduation of alcohol 70% or with
a mixture of alcohol and ether (ratio alcohol: 3 to ether: 7). (3) With a spiral movement (starting from the center of
the lens) we will then clean the surface of the lens. (4) Dry its surface by using pressurized dry air and check that
the lens is clean either with the help of a magnifying glass or by screwing the lens back on the revolving nosepiece
of the microscope.
Dirty
9
Clean