7
8
may be used to select self-definition graphics, including the
cross line, coordinates lattice, carrying out simple locating and
measurement.
On the micro-ruler is calibrated with precise graduations of three
kinds, i.e. 0.1mm, 0.01mm and 0.05mm respectively. Prior to the
measurement of the object, select firstly the coordinate or lattice
for the self-definition graph. Then, select a certain graduation of
micro-ruler under the digital LCD microscope. After having clear
focusing, estimate the separation of the coordinate or lattices by
comparing the separation of coordinate or lattice with the
distance of the standard graduation. Under the condition not to
change the power, observe the object inspected. After having
clear focusing, user can estimate the length or size of area for
the object.
3.5 Self-definition graphics
3.6 How to measure
May be used to select among colors of the self definition
graphics, facilitating the clear indication under different color
materials.
Select the standard graduation of 0.05mm under a given power
and move the micro-ruler after having clear focusing so that
the coordinate corresponds with the micro-ruler. The standard
ruler of every 12 graduations correspond to 19 graduations of
the coordinate ruler, then, each graduation of the coordinate
ruler is about 0.03mm
（
12 0.05/19
）
. In this case, user can
carry out the measurement for the object observed under
micro-scope according the distance of coordinate ruler
(requiring re-calibration of the separation of coordinate ruler
each time for a changed power).
Example:
3.7 Selection of function menu
With the help of the
function menu, it is available to carry out the
setting for the whole system. It is available to select the following
functions through right/left key:
